High-yield pineapple planting method

Abstract

The invention provides a high-yield pineapple planting method. According to the method, the biological carbon base fertilizer, the biological rooting agent, the organic water-soluble fertilizer and the calcium-containing flower forcing agent are used in different steps of pineapple planting respectively, and the yield of pineapples is increased through comprehensive action.

Description

Technical Field

[0001] The invention belongs to the technical field of pineapple planting, and particularly relates to a pineapple planting method with high yield. Background Art

[0002] Pineapple, also known as pineapple, is a famous tropical fruit. my country has a history of nearly 400 years of pineapple cultivation. Pineapple has become one of the most distinctive and competitive tropical fruits in southern my country. It has contributed to local economic development and farmers' income growth. my country's pineapple production areas are mainly in Guangdong, Hainan, Guangxi, Yunnan, Fujian and other provinces (regions), especially Guangdong and Hainan, whose production accounts for 61% and 24% of the country respectively. In recent years, my country's pineapple production and research have developed, mainly manifested in the increase in pineapple planting area and stable yield, progress in pineapple cultivation technology and physiological and biochemical research, and new developments in pineapple post-harvest preservation, processing and utilization research. The existing pineapple planting methods are insufficient in the research of base fertilizer, rooting agent, flowering agent, etc., and there are few records of the application of relevant materials to increase the yield of pineapple planting.

[0003] Therefore, how to select suitable base fertilizer, rooting agent, organic water-soluble fertilizer, and calcium-containing flower-inducing agent in different steps of pineapple planting to increase pineapple yield has become a direction that needs to be focused on. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a high-yield pineapple planting method, by using bio-carbon-based fertilizer, bio-rooting agent, organic water-soluble fertilizer and calcium-containing flower-inducing agent in different steps of pineapple planting, the comprehensive effect of which can improve the pineapple yield.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a high-yield pineapple planting method, which is characterized by comprising the following steps:

[0007] Step S1: 3 months before planting, deep plowing is performed on the plantation, ridges are formed for planting, planting furrows are dug in the middle of the furrows along the direction of the furrows, and biocarbon-based fertilizer is applied in the planting furrows;

[0008] Step S2: picking pineapple sucker seedlings with a height of 40 cm in August for planting, soaking the roots of the sucker seedlings with a rooting agent before planting, and planting after the roots are dried;

[0009] Step S3:

[0010] (1) One month after the planting in step S2, the pineapple plants are sprayed with 800 times diluted 50% carbendazim wettable powder and 1000 times diluted seaweed extract;

[0011] (2) After 2 months of planting in step S2, the pineapple plants are sprayed with 500 times diluted organic water-soluble fertilizer, twice a month, for 3 consecutive months;

[0012] (3) Five months after the planting in step S2, the pineapple plants are sprayed with 1000 times of seaweed extract, 500 times of high potassium compound fertilizer and 800 times of 50% carbendazim wettable powder, twice a month;

[0013] Step S4: spraying 200 times the amount of calcium-containing flower-inducing agent on the leaves of the pineapple plants 7 days before the flower-inducing, and spraying 300 times the amount of calcium-containing flower-inducing agent on the leaves of the pineapple plants on the 5th day of the flower-inducing;

[0014] Step S5: spraying 200 times of trace element fertilizer from the small fruit stage to the early stage of expansion, with an interval of 15 days between each application, during which two robust sucking seedlings are retained, and the remaining seedlings are removed, mainly supplying nutrition to the fruit, spraying 800 times of 50% carbendazim wettable powder once in the late stage of expansion, and then bagging the fruits.

[0015] The following are preferred technical solutions of the present invention, but are not intended to limit the technical solutions provided by the present invention. Through the following preferred technical solutions, the objectives and beneficial effects of the present invention can be better achieved and realized.

[0016] As a preferred technical solution of the present invention, the preparation method of the biochar-based fertilizer in step S1 is as follows: 20 parts of potassium dihydrogen phosphate are added to 100 parts of deionized water and mixed evenly to form a modifier solution, 10 parts of corn stalk powder are added to the modifier solution and soaked for 12 hours, and then dried at a temperature of 90°C for 6 hours; after drying, it is placed in a box-type resistance furnace for pre-oxidation, and then carbonized under anaerobic conditions, cooled to room temperature and ground and crushed to obtain biomass carbon; 60 parts of biomass carbon, 10 parts of bentonite, 10 parts of sodium lignin sulfonate, 10 parts of urea, 10 parts of potassium chloride, and 5 parts of ammonium dihydrogen phosphate are mixed evenly, and then 10 parts of wood vinegar and 20 parts of deionized water are added, kneaded to form a soft material, the soft material is extruded into shape and cut into pieces, and treated in an oven at 45°C for 48 hours to obtain biochar-based fertilizer.

[0017] Preferably, the pre-oxidation temperature is 240-250° C., the pre-oxidation time is 1-2 hours, the carbonization treatment temperature is 400-650° C., and the carbonization treatment time is 2-4 hours.

[0018] Preferably, the application amount of the biochar-based fertilizer in step S1 is 1800-2000 kg / mu.

[0019] The rich pore structure and surface hydrophilic functional groups of the biochar in the biochar-based fertilizer allow water to be retained in the soil and inhibit water loss through osmosis. Therefore, the water holding capacity of rough sandy soil is significantly increased after the application of biochar-based fertilizer. In addition, biochar-based fertilizer has a positive effect on the physical and chemical properties and microorganisms of the soil, promotes pineapple growth and nutrient absorption, improves the physiological indicators of pineapples, and thus increases pineapple yields.

[0020] As a preferred technical solution of the present invention, the rooting agent in step S2 is a biological rooting agent; the preparation method of the biological rooting agent is: add 0.8 parts of sodium bicarbonate to 20 parts of deionized water to fully dissolve, then add 300 parts of methanol, stir evenly to obtain an extract; weigh 20 parts of purple cabbage powder, add 40 parts of the extract, shake for 0.5 hours, soak in a 4°C refrigerator overnight, take out and ultrasonically extract for 1 hour, filter and remove the filter residue to obtain the biological rooting agent.

[0021] The biological rooting agent is obtained by extracting purple cabbage, which contains indolebutyric acid and naphthylacetic acid. Indolebutyric acid can improve the photosynthetic efficiency of plants, enhance the activity of antioxidant enzymes, promote the growth and division of plant cells, induce the occurrence of root primordia, and improve the rooting rate of plants; naphthylacetic acid can promote the dedifferentiation of thin-walled cells at the base of cuttings, restore the ability of cells to divide, produce callus tissue, and provide more abundant energy and carbon source for root formation. The biological rooting agent ensures the normal growth of pineapples, thereby increasing subsequent yields.

[0022] As a preferred technical solution of the present invention, the preparation method of the organic water-soluble fertilizer in step S3 is:

[0023] (1) Weigh 100 parts of seaweed powder, wash it and put it into a homogenizer, add 300 parts of deionized water, and shear at high speed to obtain seaweed homogenate; ultrasonically treat the seaweed at 75 kHz for 1 hour, then add 2 parts of cellulase and 3 parts of pectinase, enzymolyze at 30°C for 5 hours, and obtain seaweed extract after centrifugation and filtration;

[0024] (2) crushing and grinding 60 parts of peanut bran, adding 30 parts of acrylic acid and 5 parts of ammonium persulfate, reacting at 60° C. for 4 hours, washing and drying after the reaction is completed, and obtaining modified peanut bran;

[0025] (3) Add 30 parts of modified peanut bran, 20 parts of fulvic acid and 20 parts of urea to 100 parts of seaweed extract, stir and mix, filter, remove undissolved solid residue, and concentrate the filtered solution to obtain an organic water-soluble fertilizer.

[0026] Preferably, the application amount of the organic water-soluble fertilizer in step S3 is 1200-1500 kg / mu.

[0027] Organic water-soluble fertilizer uses a combination of physical and biological methods to fully lyse seaweed cells, release intracellular substances, and use a variety of enzymes to effectively degrade proteins, polysaccharides and other substances into small molecules with simple structures, which are easily absorbed and utilized by pineapples; peanut bran can increase the chlorophyll content and root vitality of pineapples, increase the activity of soil-related enzymes and the number of microorganisms, promote the growth of pineapple plants, and effectively increase yields.

[0028] As a preferred technical solution of the present invention, the preparation method of the calcium-containing flower initiator in step S4 is: adding 200 parts of ethephon and 15 parts of calcium oxide to 500 parts of deionized water, stirring evenly, to obtain the calcium-containing flower initiator.

[0029] The calcium oxide in the calcium-containing flower-inducing agent can not only provide calcium, which is an important structural component of the cell wall of pineapple fruit, playing a key role in maintaining the cell wall structure and stabilizing the cell membrane, thereby improving the disease resistance of pineapple plants, but also regulate the pH, which is beneficial to the release of ethephon, promotes pineapple flowering, ensures a good flower-inducing effect, and increases pineapple yield through synergistic effects.

[0030] Preferably, the application amount of trace element fertilizer in step S5 is 12 kg / mu.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The present invention can inhibit water loss through biochar-based fertilizer, increase the water holding capacity of sandy soil, and have a positive impact on the physical and chemical properties of the soil and microorganisms, thereby promoting the growth and nutrient absorption of pineapples; the bio-rooting agent can improve the photosynthetic efficiency of plants, promote the growth and division of plant cells, and provide a relatively rich carbon source to ensure the normal growth of pineapples.

[0033] (2) The peanut bran in the organic water-soluble fertilizer of the present invention can increase the chlorophyll content and root activity of pineapple, increase the activity of soil-related enzymes and the number of microorganisms, and promote the growth of pineapple plants; the calcium oxide in the calcium-containing flower-inducing agent can not only provide calcium elements, but also adjust the pH, which is beneficial to the release of ethephon, thereby increasing the yield of pineapple through synergistic effects. DETAILED DESCRIPTION

[0034] For the convenience of understanding the present invention, the present invention lists the following embodiments. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0035] The sources of some components in the embodiments and comparative examples are as follows:

[0036] Tainong No. 17 pineapple sucker seedlings come from the Guangxi South Asian Tropical Agricultural Science Research Institute;

[0037] Calcium magnesium phosphate fertilizer (purchased from Fuquan Fuling Phosphate Fertilizer Development Co., Ltd., wherein available phosphorus P2O5 ≥ 12%, soluble silicon SiO2 ≥ 18%, calcium oxide CaO ≥ 30% and potassium oxide K2O ≥ 1%);

[0038] 3-Indolebutyric acid: CAS No. 133-32-4;

[0039] 50% carbendazim wettable powder, purchased from Jiangsu Lanfeng Biochemical Co., Ltd.;

[0040] Seaweed extract was purchased from Lanzhou Waterless Biotechnology Co., Ltd.;

[0041] Wujin Green was purchased from Jiangmen Jieshi Plant Nutrition Co., Ltd.;

[0042] High potassium compound fertilizer was purchased from Wuhan Zhongnong International Trade Co., Ltd.;

[0043] Ethephon: CAS No. 16672-87-0;

[0044] Trace element fertilizer (trade name: Jiaqiang Zhongwei, purchased from Guangzhou Xianyinong Agricultural Technology Co., Ltd., containing 3% calcium, 4% magnesium, 5% zinc, and 4.5% boron).

[0045] Preparation of biochar-based fertilizer: 20 parts of potassium dihydrogen phosphate (CAS No. 7778-77-0) were added to 100 parts of deionized water and mixed evenly to form a modifier solution. 10 parts of corn stalk powder (purchased from Xi'an Jihe Agricultural Technology Co., Ltd.) were added to the modifier solution and soaked for 12 hours, and then dried at 90°C for 6 hours; after drying, it was placed in a box-type resistance furnace for pre-oxidation (pre-oxidation temperature was 250°C, time was 2 hours), and then carbonized under anaerobic conditions (carbonization treatment temperature was 650°C, treatment time was 2 hours), cooled to room temperature, ground and crushed to obtain biochar. Biomass carbon: 60 parts of biomass carbon, 10 parts of bentonite (CAS No. 1302-78-9), 10 parts of sodium lignin sulfonate (CAS No. 8061-51-6), 10 parts of urea (CAS No. 57-13-6), 10 parts of potassium chloride (CAS No. 7447-40-7), and 5 parts of ammonium dihydrogen phosphate (CAS No. 7722-76-1) were mixed evenly, and then 10 parts of wood vinegar (purchased from Jinan Hongsen Biotechnology Co., Ltd.) and 20 parts of deionized water were added, and the mixture was kneaded to form a soft material, and the soft material was extruded into pieces and cut into pieces, and then treated in an oven at 45° C. for 48 hours to obtain biochar-based fertilizer.

[0046] Preparation of biological rooting agent: add 0.8 parts of sodium bicarbonate (CAS No. 144-55-8) to 20 parts of deionized water to fully dissolve, then add 300 parts of methanol (CAS No. 67-56-1), stir evenly to obtain an extract; weigh 20 parts of purple cabbage powder (purchased from Xi'an Youshuo Biotechnology Co., Ltd.), add 40 parts of the extract, shake for 0.5 hours, soak in a 4°C refrigerator overnight, take out and ultrasonically extract for 1 hour, filter and remove the filter residue to obtain a biological rooting agent.

[0047] Preparation of organic water-soluble fertilizer:

[0048] (1) Weigh 100 parts of seaweed powder (purchased from Ningxia Vanilla Biotechnology Co., Ltd.), wash and add it into a homogenizer, add 300 parts of deionized water, and high-speed shear to obtain seaweed homogenate; ultrasonically treat the seaweed at 75 kHz for 1 hour, then add 2 parts of cellulase (CAS No. 9012-54-8) and 3 parts of pectinase (CAS No. 9032-75-1), enzymolyze at 30°C for 5 hours, and obtain seaweed extract after centrifugation and filtration;

[0049] (2) 60 parts of peanut bran (purchased from Shijiazhuang Fuyuan Technology Co., Ltd.) were crushed and ground, 30 parts of acrylic acid (CAS No. 79-10-7) and 5 parts of ammonium persulfate (CAS No. 7727-54-0) were added, and the mixture was reacted at 60° C. for 4 h. After the reaction was completed, the mixture was washed and dried to obtain modified peanut bran;

[0050] (3) Add 30 parts of modified peanut bran, 20 parts of fulvic acid (purchased from Shandong Quanlin Jiayou Fertilizer Co., Ltd.), and 20 parts of urea (CAS No. 57-13-6) to 100 parts of seaweed extract, stir and mix, filter to remove undissolved solid residue, and concentrate the filtered solution to obtain an organic water-soluble fertilizer.

[0051] Preparation of calcium-containing flower initiator: Add 200 parts of ethephon (CAS No. 16672-87-0) and 15 parts of calcium oxide (CAS No. 1305-78-8) into 500 parts of deionized water, stir evenly, and obtain the calcium-containing flower initiator.

[0052] Example 1

[0053] This embodiment provides a high-yield pineapple planting method, comprising the following steps:

[0054] Step S1: 3 months before planting, the plantation is deep-ploughed, and the furrows are planted. The length of the furrow is 35m, the width is 1.2m, the width of the furrow between the furrows is 50cm, and a planting furrow is dug in the middle of the furrow along the direction of the furrow. The depth of the planting furrow is 15cm and the width is 20cm. Biochar-based fertilizer is applied in the planting furrow at an application rate of 2000kg / mu;

[0055] Step S2: In August, pineapple sucker seedlings with a height of 40 cm were picked for planting at a planting density of 4000 plants / mu. Before planting, a biological rooting agent (with a concentration of 600 mg / L) was used to soak the roots of the sucker seedlings for 2 hours, and the roots were dried before planting;

[0056] Step S3:

[0057] (1) One month after the planting in step S2, the pineapple plants are sprayed with 800 times diluted 50% carbendazim wettable powder and 1000 times diluted seaweed extract;

[0058] (2) After 2 months of planting in step S2, the pineapple plants are sprayed with 500 times diluted organic water-soluble fertilizer, the application amount of which is 1500 kg / mu, twice a month, for 3 consecutive months;

[0059] (3) Five months after the planting in step S2, the pineapple plants are sprayed with 1000 times of seaweed extract, 500 times of high potassium compound fertilizer and 800 times of 50% carbendazim wettable powder, twice a month;

[0060] Step S4: 7 days before the flowering, spray the leaves of the pineapple plants with a 200-fold solution of a calcium-containing flowering inducing agent, with a dosage of 120 mL / plant; on the 5th day after the flowering, spray the leaves of the plants with a 300-fold solution of a calcium-containing flowering inducing agent, with a dosage of 80 mL / plant;

[0061] Step S5: spraying 200 times of trace element fertilizer from the small fruit stage to the early stage of expansion, the application amount of the trace element fertilizer is 12kg / mu, each application is 15 days apart, during which two robust sucking seedlings are retained, and the remaining seedlings are removed to mainly supply fruit nutrition, and after spraying 800 times of 50% carbendazim wettable powder once in the late stage of expansion, the fruits are bagged in double-layer paper bags with yellow outer side and black inner side and a specification of 30cm×25cm.

[0062] Example 2

[0063] This embodiment provides a high-yield pineapple planting method, comprising the following steps:

[0064] Step S1: 3 months before planting, the plantation is deep-ploughed, and the ridges are planted. The length of the ridge is 35m, the width is 1.2m, the width of the furrow between the ridges is 50cm, and a planting furrow is dug in the middle of the ridge along the direction of the ridge. The depth of the planting furrow is 15cm and the width is 20cm. Biochar-based fertilizer is applied in the planting furrow at an application rate of 1800kg / mu;

[0065] Step S2: In August, pineapple sucker seedlings with a height of 40 cm were picked for planting at a planting density of 4000 plants / mu. Before planting, a biological rooting agent (with a concentration of 600 mg / L) was used to soak the roots of the sucker seedlings for 2 hours, and the roots were dried before planting;

[0066] Step S3:

[0067] (1) One month after the planting in step S2, the pineapple plants are sprayed with 800 times diluted 50% carbendazim wettable powder and 1000 times diluted seaweed extract;

[0068] (2) After 2 months of planting in step S2, the pineapple plants are sprayed with 500 times diluted organic water-soluble fertilizer, the application amount of which is 1200 kg / mu, twice a month, for 3 consecutive months;

[0069] (3) Five months after the planting in step S2, the pineapple plants are sprayed with 1000 times of seaweed extract, 500 times of high potassium compound fertilizer and 800 times of 50% carbendazim wettable powder, twice a month;

[0070] Step S4: 7 days before the flowering, spray the leaves of the pineapple plants with a 200-fold solution of a calcium-containing flowering inducing agent, with a dosage of 120 mL / plant; on the 5th day after the flowering, spray the leaves of the plants with a 300-fold solution of a calcium-containing flowering inducing agent, with a dosage of 80 mL / plant;

[0071] Step S5: spraying 200 times of trace element fertilizer from the small fruit stage to the early stage of expansion, the application amount of the trace element fertilizer is 12kg / mu, each application is 15 days apart, during which two robust sucking seedlings are retained, and the remaining seedlings are removed to mainly supply fruit nutrition, and after spraying 800 times of 50% carbendazim wettable powder once in the late stage of expansion, the fruits are bagged in double-layer paper bags with yellow outer side and black inner side and a specification of 30cm×25cm.

[0072] Example 3

[0073] This embodiment provides a high-yield pineapple planting method, comprising the following steps:

[0074] Step S1: 3 months before planting, the plantation is deep-ploughed, and the furrows are planted. The length of the furrow is 35m, the width is 1.2m, the width of the furrow between the furrows is 50cm, and a planting furrow is dug in the middle of the furrow along the direction of the furrow. The depth of the planting furrow is 15cm and the width is 20cm. Biochar-based fertilizer is applied in the planting furrow at an application rate of 1900kg / mu;

[0075] Step S2: In August, pineapple sucker seedlings with a height of 40 cm were picked for planting at a planting density of 4000 plants / mu. Before planting, a biological rooting agent (with a concentration of 600 mg / L) was used to soak the roots of the sucker seedlings for 2 hours, and the roots were dried before planting;

[0076] Step S3:

[0077] (1) One month after the planting in step S2, the pineapple plants are sprayed with 800 times diluted 50% carbendazim wettable powder and 1000 times diluted seaweed extract;

[0078] (2) After 2 months of planting in step S2, the pineapple plants are sprayed with 500 times diluted organic water-soluble fertilizer, the application amount of which is 1300 kg / mu, twice a month, for 3 consecutive months;

[0079] (3) Five months after the planting in step S2, the pineapple plants are sprayed with 1000 times of seaweed extract, 500 times of high potassium compound fertilizer and 800 times of 50% carbendazim wettable powder, twice a month;

[0080] Step S4: 7 days before the flowering, spray the leaves of the pineapple plants with a 200-fold solution of a calcium-containing flowering inducing agent, with a dosage of 120 mL / plant; on the 5th day after the flowering, spray the leaves of the plants with a 300-fold solution of a calcium-containing flowering inducing agent, with a dosage of 80 mL / plant;

[0081] Step S5: spraying 200 times of trace element fertilizer from the small fruit stage to the early stage of expansion, the application amount of the trace element fertilizer is 12kg / mu, each application is 15 days apart, during which two robust sucking seedlings are retained, and the remaining seedlings are removed to mainly supply fruit nutrition, and after spraying 800 times of 50% carbendazim wettable powder once in the late stage of expansion, the fruits are bagged in double-layer paper bags with yellow outer side and black inner side and a specification of 30cm×25cm.

[0082] Example 4

[0083] This embodiment provides a high-yield pineapple planting method, which is different from Embodiment 1 only in that the biocarbon-based fertilizer is replaced with calcium magnesium phosphate fertilizer in this embodiment, and the rest is the same as Embodiment 1.

[0084] Example 5

[0085] This embodiment provides a high-yield pineapple planting method, which is different from Example 1 only in that the biological rooting agent (600 mg / L) is replaced by 3-indolebutyric acid (600 mg / L) in this example, and the rest is the same as Example 1.

[0086] Example 6

[0087] The present embodiment provides a high-yield pineapple planting method, which is different from the embodiment 1 only in that the 500-fold solution of organic water-soluble fertilizer is replaced with 500-fold solution of Wujinlu in the present embodiment, and the rest is the same as the embodiment 1.

[0088] Comparative Example 1

[0089] This comparative example provides a pineapple planting method, which is different from Example 1 only in that, in this comparative example, the biocarbon-based fertilizer is replaced with calcium magnesium phosphate fertilizer, the biological rooting agent (600 mg / L) is replaced with 3-indolebutyric acid (600 mg / L), the 500-fold solution of organic water-soluble fertilizer is replaced with 500-fold solution of Wujinlu, and the 800-fold solution of calcium-containing flower-inducing agent is replaced with 800-fold solution of ethephon, and the rest is the same as Example 1.

[0090] The above examples and comparative examples were tested, and the single fruit weight was measured according to the method of "Tropical and South Subtropical Fruit Germplasm Resources Data Quality Control Specifications". The yield of each area was measured at harvest time and converted into yield per hectare (t / hm 2 ).

[0091] The above test data are shown in Table 1.

[0092] Table 1 Test results

[0093] Single fruit weight (kg) <![CDATA[Yield (t / hm 2 )]]> Example 1 1.68±3.89 70.71±3.17 Example 2 1.64±3.81 70.23±3.11 Example 3 1.67±3.83 70.37±3.12 Example 4 1.49±3.16 60.55±2.77 Example 5 1.48±3.12 60.34±2.71 Example 6 1.47±3.13 60.42±2.74 Comparative Example 1 1.27±2.84 48.76±1.34

[0094] From the above content, it can be seen that the present invention uses bio-carbon-based fertilizer, bio-rooting agent, organic water-soluble fertilizer and calcium-containing flower-inducing agent in different steps of pineapple planting, and the comprehensive effect increases the pineapple yield. The single fruit weight of Example 1 is 1.68±3.89kg, and the yield is 70.71±3.17t / hm 2 The single fruit weight of Example 2 is 1.64±3.81kg, and the yield is 70.23±3.11t / hm 2 The single fruit weight of Example 3 is 1.67±3.83kg, and the yield is 70.37±3.12t / hm 2 .

[0095] Compared with Example 1, if the bio-carbon-based fertilizer is not used, the yield decreases (Example 4); compared with Example 1, if the biological rooting agent is not used, the yield decreases (Example 5); compared with Example 1, if the organic water-soluble fertilizer is not used, the yield decreases (Example 6); compared with Example 1, if the bio-carbon-based fertilizer, the biological rooting agent, the organic water-soluble fertilizer and the calcium-containing flower-inducing agent are not used, the yield is the lowest (Comparative Example 1); this shows that the pineapple planting method of the present invention can obtain high yield.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for growing pineapples with high yield, characterized in that: The following steps are involved: Step S1: 3 months before planting, deep plowing is performed on the plantation, ridges are formed for planting, planting furrows are dug in the middle of the furrows along the direction of the furrows, and biocarbon-based fertilizer is applied in the planting furrows; Step S2: picking pineapple sucker seedlings with a height of 40 cm in August for planting, soaking the roots of the sucker seedlings with a rooting agent before planting, and planting after the roots are dried; Step S3: (1) One month after the planting in step S2, the pineapple plants are sprayed with 800 times diluted 50% carbendazim wettable powder and 1000 times diluted seaweed extract; (2) After 2 months of planting in step S2, the pineapple plants are sprayed with 500 times diluted organic water-soluble fertilizer, twice a month, for 3 consecutive months; (3) Five months after the planting in step S2, the pineapple plants are sprayed with 1000 times of seaweed extract, 500 times of high potassium compound fertilizer and 800 times of 50% carbendazim wettable powder, twice a month; Step S4: spraying 200 times the amount of calcium-containing flower-inducing agent on the leaves of the pineapple plants 7 days before the flower-inducing, and spraying 300 times the amount of calcium-containing flower-inducing agent on the leaves of the pineapple plants on the 5th day of the flower-inducing; Step S5: spraying 200 times of trace element fertilizer from the small fruit stage to the early stage of expansion, with an interval of 15 days between each application, during which two robust sucking seedlings are retained, and the remaining seedlings are removed, mainly supplying nutrition to the fruit, spraying 800 times of 50% carbendazim wettable powder once in the late stage of expansion, and then bagging the fruits.

2. A pineapple planting method with high yield according to claim 1, characterized in that: The preparation method of the biochar-based fertilizer in step S1 is as follows: 20 parts of potassium dihydrogen phosphate are added to 100 parts of deionized water, mixed evenly to form a modifier solution, 10 parts of corn stalk powder are added to the modifier solution and soaked for 12 hours, and then dried at a temperature of 90°C for 6 hours; after drying, the mixture is placed in a box-type resistance furnace for pre-oxidation, and then carbonized under anaerobic conditions, cooled to room temperature, and ground and crushed to obtain biomass carbon; 60 parts of biomass carbon, 10 parts of bentonite, 10 parts of sodium lignin sulfonate, 10 parts of urea, 10 parts of potassium chloride, and 5 parts of ammonium dihydrogen phosphate are mixed evenly, and then 10 parts of wood vinegar and 20 parts of deionized water are added, kneaded to form a soft material, the soft material is extruded into shape and cut into pieces, and treated in an oven at 45°C for 48 hours to obtain the biochar-based fertilizer.

3. A high-yield pineapple planting method according to claim 2, characterized in that: The pre-oxidation temperature is 240-250° C., the pre-oxidation time is 1-2 hours, the carbonization treatment temperature is 400-650° C., and the carbonization treatment time is 2-4 hours.

4. A high-yield pineapple planting method according to claim 1, characterized in that: The application amount of the biochar-based fertilizer in step S1 is 1800-2000 kg / mu.

5. A high-yield pineapple planting method according to claim 1, characterized in that: The rooting agent in step S2 is a biological rooting agent.

6. A high-yield pineapple planting method according to claim 5, characterized in that: The preparation method of the biological rooting agent is as follows: 0.8 parts of sodium bicarbonate is added into 20 parts of deionized water to fully dissolve, then 300 parts of methanol are added, and the mixture is stirred evenly to obtain an extract; 20 parts of purple cabbage powder are weighed, 40 parts of the extract are added, the mixture is shaken for 0.5 hours, and the mixture is soaked in a refrigerator at 4°C overnight, and then the mixture is taken out and ultrasonically extracted for 1 hour, and then the residue is removed after filtering to obtain the biological rooting agent.

7. A high-yield pineapple planting method according to claim 1, characterized in that: The preparation method of the organic water-soluble fertilizer in step S3 is: (1) Weigh 100 parts of seaweed powder, wash it and put it into a homogenizer, add 300 parts of deionized water, and shear at high speed to obtain seaweed homogenate; ultrasonically treat the seaweed at 75 kHz for 1 hour, then add 2 parts of cellulase and 3 parts of pectinase, enzymolyze at 30°C for 5 hours, and obtain seaweed extract after centrifugation and filtration; (2) crushing and grinding 60 parts of peanut bran, adding 30 parts of acrylic acid and 5 parts of ammonium persulfate, reacting at 60° C. for 4 hours, washing and drying after the reaction is completed, and obtaining modified peanut bran; (3) Add 30 parts of modified peanut bran, 20 parts of fulvic acid and 20 parts of urea to 100 parts of seaweed extract, stir and mix, filter, remove undissolved solid residue, and concentrate the filtered solution to obtain an organic water-soluble fertilizer.

8. A high-yield pineapple planting method according to claim 1, characterized in that: The application amount of the organic water-soluble fertilizer in step S3 is 1200-1500 kg / mu.

9. A high-yield pineapple planting method according to claim 1, characterized in that: The preparation method of the calcium-containing flower initiator in step S4 is as follows: 200 parts of ethephon and 15 parts of calcium oxide are added to 500 parts of deionized water, and stirred evenly to obtain the calcium-containing flower initiator.

10. A high-yield pineapple planting method according to claim 1, characterized in that: The application amount of trace element fertilizer in step S5 is 12 kg / mu.