Hainan camellia oleifera high-survival-rate drought-resistant afforestation and biological nutrient solution preparation method
Through the synergistic effect of specialized biological nutrient solution and afforestation technology, the survival rate and preservation rate of Camellia oleifera afforestation have been improved, solving the problems of low survival rate and weak drought resistance of Camellia oleifera plants, and realizing the healthy growth of plants and soil nutrient supply under drought conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INST OF TROPICAL HORTICULTURE HAINAN ACAD OF AGRI SCI
- Filing Date
- 2026-01-26
- Publication Date
- 2026-04-21
AI Technical Summary
The survival rate of Camellia oleifera is low during the afforestation process. It has weak drought resistance and insufficient soil nutrient supply, which affects the growth and long-term healthy development of the plants. In addition, the soil's water retention capacity is insufficient during the drought period, which leads to the death of the plants.
Using a specialized biological nutrient solution containing probiotics, potassium humate, potassium nitrate, and coconut coir extract, combined with afforestation techniques, it enhances root growth and leaf water retention capacity, increases the available phosphorus content in the soil, and strengthens the plant's resistance to adverse conditions.
It significantly improves the survival and retention rate of Camellia oleifera afforestation, enhances the drought resistance of plants, improves soil nutrient status, increases plant growth vigor, and resists drought stress.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of plant cultivation technology, and in particular to a method for high survival rate drought-resistant afforestation of Camellia oleifera in Hainan and preparation of biological nutrient solution. Background Technology
[0002] Camellia oleifera, as an important woody oil crop, plays a strategic role in ensuring edible oil supply and improving the ecological environment. However, current camellia oleifera afforestation faces numerous technical bottlenecks, hindering afforestation quality and industrial development. On the one hand, traditional camellia oleifera afforestation techniques have limited effectiveness in improving the initial adaptability of plants after planting, resulting in low survival rates. Furthermore, the long-term growth process is affected by environmental stress and insufficient nutrient supply, making it difficult to guarantee the survival rate of afforestation. This not only increases the manpower and material costs of later replanting and reforestation but also seriously affects the overall effectiveness of afforestation projects. On the other hand, major camellia oleifera producing areas often experience seasonal droughts. During droughts, insufficient soil water retention and weak drought resistance of the plants often lead to rapid decline in soil moisture content, severe wilting of tea leaves, and excessive water loss from leaves, resulting in stunted growth and even death of the plants. This has become a key factor restricting the success of camellia oleifera afforestation in arid areas.
[0003] Meanwhile, traditional afforestation techniques lack effective means to synergistically enhance soil nutrients and plant growth. After planting, the content of key nutrients such as available phosphorus in the soil is insufficient to meet the growth needs of Camellia oleifera. Furthermore, the root system of the plants expands slowly and the above-ground parts grow weakly, making it impossible to form a virtuous cycle of soil nutrient supply and plant growth. This further affects the long-term healthy development and yield potential of Camellia oleifera.
[0004] Therefore, developing a technical solution that can significantly improve the survival and retention rate of Camellia oleifera afforestation, enhance its overall drought resistance, promote plant growth, and improve soil nutrient status is of great practical significance for breaking through existing technical bottlenecks and promoting the sustainable development of the Camellia oleifera industry under complex site conditions. Summary of the Invention
[0005] The purpose of this invention is to provide a method for high-survival-rate drought-resistant afforestation of Camellia oleifera in Hainan and a method for preparing biological nutrient solution. This method specifically addresses the pain points of high temperature and drought in Hainan. By combining afforestation technology with a special biological nutrient solution, the survival rate and retention rate of Camellia oleifera afforestation are significantly improved compared to traditional methods. The special nutrient solution has the characteristics of high temperature resistance, drought resistance and root promotion, which can promote the growth of Camellia oleifera roots, improve the water retention capacity of leaves, increase the available phosphorus content in the soil, and significantly enhance the plant's stress resistance and growth vigor. During the drought period, the soil moisture content is higher, and the wilting degree of Camellia oleifera leaves is much lower than that of traditional methods, which can effectively resist periodic drought.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a nutrient solution specifically for camellia oil, containing the following raw materials in parts by weight: 6-12 parts probiotic agent, 8-12 parts potassium humate, 15-20 parts potassium nitrate, 60-70 parts coconut coir extract, and 95-105 parts water.
[0007] Preferably, the probiotic preparation contains the following raw materials in parts by weight: 3-5 parts of Bacillus subtilis powder, 2-4 parts of Bacillus mucilage powder, and 1-3 parts of Pseudomonas aeruginosa powder, wherein the viable count of the Bacillus subtilis powder is 2-5 × 10⁻⁶. 9 CFU / g, the viable count of the Bacillus subtilis powder is 1~3×10⁻⁶. 9 The viable count of the *Pseudomonas* powder is 0.8~2×10 CFU / g. 9 CFU / g.
[0008] Preferably, the method for preparing the coconut coir extract includes the following steps: a. Soak coconut coir for 1-2 hours, then mix with anhydrous ethanol and reflux for 3-4 hours to obtain filtrate; b. Filter the filtrate through a 5-10 kDa ultrafiltration membrane and vacuum dry to obtain coconut coir extract; The solution used for soaking coconut coir in step a is 2-4 wt% hydrogen peroxide, the ratio of anhydrous ethanol to coconut coir is 8-10 mL: 0.8-1.2 g, the reflux extraction is accompanied by ultrasound, the power of the ultrasound is 250-350 W, and the temperature of the reflux extraction is 60-70℃.
[0009] The present invention also provides a method for preparing the nutrient solution, comprising the following steps: A. Potassium humate, potassium nitrate, coconut coir extract and water are mixed to obtain mixed solution 1; B. Mix the mixed solution 1 and the probiotic agent, and let it stand for 1-2 hours to mature.
[0010] Preferably, the amount of water used in step A is 8 to 10 times the total mass of potassium humate, potassium nitrate, and coconut coir extract.
[0011] The present invention also provides the application of the nutrient solution in improving the drought resistance and survival rate of Camellia oleifera.
[0012] This invention also provides an afforestation method for improving the survival rate and drought resistance of Camellia oleifera using the nutrient solution, comprising the following steps: (1) Select land with a pH of 5.0 to 7.0 and a slope of ≤25° as planting site in March to April or September to October, fully cultivate and prepare the land, and dig planting holes; (2) Apply 4.5-5.5 kg of well-rotted organic fertilizer to the lower layer of the planting hole, and backfill the top layer of surface soil to the level of the hole opening. Lightly press the soil in the hole to make the surface sink 3-5 cm. (3) Place the seedlings with a height of 25-30cm in the center of the planting hole. The planting depth is 2-3cm above the ground at the rootstock. After planting, build a circular water storage tray with a diameter of 60-80cm and a height of 10-15cm around the seedlings, water them to settle the roots, and complete the afforestation. (4) After afforestation, control the soil moisture content to 15-22%, and dilute the nutrient solution 400-600 times and apply it to the roots of the seedlings.
[0013] Preferably, the depth of the full-scale land preparation in step (1) is 30~40cm, the size of the planting hole is 50~70cm×50~70cm×30~40cm, and the density of the planting hole is 30~35 holes / mu.
[0014] Preferably, the composted organic fertilizer in step (2) has a composting degree of ≥85%, a pH value of 6.0~7.5, and is applied by mixing the composted organic fertilizer with soil and placing it in the lower layer of the planting hole. The volume ratio of the composted organic fertilizer to the soil is 1:4~6. The upper layer is covered with 1~2cm of fine soil to avoid direct contact between the composted organic fertilizer and the seedling roots. The lower layer of the planting hole is the area 20~25cm deep from the bottom of the planting hole upwards. The root-setting water in step (3) also contains the nutrient solution, and the amount of nutrient solution used is 0.2~0.4 kg / plant.
[0015] Preferably, the watering method in step (4) is as follows: Water every 14-20 days after transplanting for 1-90 days, for a total of 4-7 times. The amount of nutrient solution used for watering is 1.8-2.2 kg / plant / time. Water the plants 90 days after transplanting, every 28-32 days, with the amount of nutrient solution being 2.5-3.0 kg / plant / time.
[0016] The beneficial effects of this invention are as follows: To specifically address the challenges of high temperatures and drought in Hainan, this method combines afforestation techniques with a specialized biological nutrient solution, significantly improving the survival and retention rates of Camellia oleifera afforestation compared to traditional methods. The specialized nutrient solution is heat-resistant, drought-resistant, and promotes root growth, enhancing leaf water retention capacity and increasing available phosphorus content in the soil, thus significantly strengthening the plant's resilience and growth vigor. During drought periods, the wilting of Camellia oleifera leaves is far less than with traditional methods, and the soil moisture content is higher, effectively resisting periodic droughts. Detailed Implementation
[0017] This invention provides a nutrient solution specifically for camellia oil, containing the following raw materials in parts by weight: 6-12 parts probiotic agent, 8-12 parts potassium humate, 15-20 parts potassium nitrate, 60-70 parts coconut coir extract, and 95-105 parts water.
[0018] In this invention, the nutrient solution preferably contains the following raw materials in parts by weight: 9 parts probiotic agent, 10 parts potassium humate, 17 parts potassium nitrate, 64 parts coconut coir extract, and 100 parts water.
[0019] In this invention, the probiotic agent preferably contains the following raw materials in parts by weight: 3-5 parts of Bacillus subtilis powder, 2-4 parts of Bacillus mucilaginosus powder, and 1-3 parts of Pseudomonas aeruginosa powder. More preferably, it contains the following raw materials in parts by weight: 4 parts of Bacillus subtilis powder, 3 parts of Bacillus mucilaginosus powder, and 2 parts of Pseudomonas aeruginosa powder. The viable count of the Bacillus subtilis powder is preferably 2-5 × 10⁻⁶. 9 CFU / g, further preferably 4×10 9 The CFU / g of the Bacillus subtilis powder is preferably 1~3×10⁻⁶. 9 CFU / g, further preferably 2×10 9 The CFU / g of the Pseudomonas powder is preferably 0.8~2×10⁻⁶. 9 CFU / g, further preferably 1.5 × 10⁻⁶ 9 CFU / g.
[0020] In this invention, the preparation method of the coconut coir extract includes the following steps: a. Soak coconut coir for 1-2 hours, then mix with anhydrous ethanol and reflux for 3-4 hours to obtain filtrate; b. Filter the filtrate through a 5-10 kDa ultrafiltration membrane and vacuum dry to obtain coconut coir extract; The solution used for soaking coconut coir in step a is preferably 2-4 vt% hydrogen peroxide, more preferably 3 vt% hydrogen peroxide. The ratio of anhydrous ethanol to coconut coir is preferably 8-10 mL:0.8-1.2 g, more preferably 9 mL:1 g. The soaking time is more preferably 1.5 h. The reflux extraction is preferably accompanied by ultrasound. The power of the ultrasound is preferably 250-350 W, more preferably 300 W. The temperature of the reflux extraction is preferably 60-70 °C, more preferably 65 °C. The reflux extraction time is preferably 3.5 h.
[0021] The present invention also provides a method for preparing the nutrient solution, comprising the following steps: A. Potassium humate, potassium nitrate, coconut coir extract and water are mixed to obtain mixed solution 1; B. Mix the mixed solution 1 and the probiotic agent, and let it stand for 1-2 hours to mature.
[0022] Preferably, the amount of water used in step A is 8 to 10 times the total mass of potassium humate, potassium nitrate, and coconut coir extract, and more preferably 9 times the total mass of potassium humate, potassium nitrate, and coconut coir extract.
[0023] The present invention also provides the application of the nutrient solution in improving the drought resistance and survival rate of Camellia oleifera.
[0024] This invention also provides an afforestation method for improving the survival rate and drought resistance of Camellia oleifera using the nutrient solution, comprising the following steps: (1) Select land with a pH of 5.0 to 7.0 and a slope of ≤25° as planting site in March to April or September to October, fully cultivate and prepare the land, and dig planting holes; (2) Apply 4.5-5.5 kg of well-rotted organic fertilizer to the lower layer of the planting hole, and backfill the top layer of surface soil to the level of the hole opening. Lightly press the soil in the hole to make the surface sink 3-5 cm. (3) Place the seedlings with a height of 25-30cm in the center of the planting hole. The planting depth is 2-3cm above the ground at the rootstock. After planting, build a circular water storage tray with a diameter of 60-80cm and a height of 10-15cm around the seedlings, water them to settle the roots, and complete the afforestation. (4) After afforestation, control the soil moisture content to 15-22%, and dilute the nutrient solution 400-600 times and apply it to the roots of the seedlings.
[0025] In this invention, the depth of the full-scale land preparation in step (1) is preferably 30~40cm, more preferably 35cm, the size of the planting hole is preferably 50~70cm×50~70cm×30~40cm, more preferably 60cm (length)×60cm (width)×35cm (height), and the density of the planting hole is preferably 30~35 holes / mu, more preferably 32 holes / mu.
[0026] In this invention, the degree of decomposition of the decomposed organic fertilizer in step (2) is preferably ≥85%, more preferably 90%, the pH value of the decomposed organic fertilizer is preferably 6.0~7.5, more preferably 6.5, and the preferred method of applying the decomposed organic fertilizer is: after mixing the decomposed organic fertilizer and soil, it is placed in the lower layer of the planting hole, the volume ratio of the decomposed organic fertilizer to the soil is 1:4~6, and the upper layer is covered with 1~2cm of fine soil to avoid the decomposed organic fertilizer directly contacting the seedling roots. More preferably, after mixing the decomposed organic fertilizer and soil, it is placed in the lower layer of the planting hole, the volume ratio of the decomposed organic fertilizer to the soil is preferably 1:5, and the upper layer is covered with 1.5cm of fine soil to avoid the decomposed organic fertilizer directly contacting the seedling roots. The lower layer of the planting hole is preferably the area with a depth of 20~25cm from the bottom of the planting hole, more preferably the area with a depth of 20cm from the bottom of the planting hole. The root-setting water in step (3) preferably also contains the nutrient solution, and the amount of nutrient solution used is preferably 0.2~0.4 kg / plant, and more preferably 0.3 kg / plant.
[0027] In this invention, the irrigation method in step (4) is preferably: Water every 14-20 days after transplanting for 1-90 days, for a total of 4-7 times. The amount of nutrient solution used for watering is 1.8-2.2 kg / plant / time. Watering should be done every 28-32 days after transplanting, with the amount of nutrient solution being 2.5-3.0 kg / plant / time. Further preferred options are: Water every 17 days for 1 to 90 days after transplanting, for a total of 5 times. The amount of nutrient solution used for watering is 5 kg / plant / time. Ninety days after transplanting, water the plants every 30 days, with the amount of nutrient solution being 2.7 kg / plant / time.
[0028] The technical solutions provided by the present invention will be described in detail below with reference to the embodiments. However, they should not be construed as limiting the scope of protection of the present invention. It should also be noted that the raw materials and consumables used in the present invention are all conventional commercially available products.
[0029] Example 1
[0030] 1. Raw material composition (by weight): 9 parts probiotic agent (4 parts Bacillus subtilis powder, with a live bacteria count of 4 × 10⁻⁶). 9 CFU / g; 3 portions of Bacillus subtilis powder, viable count 2×10⁻⁶. 9 CFU / g; 2 portions of Pseudomonas powder, viable count 1.5 × 10⁻⁶ 9 The ingredients include CFU / g, 10 parts potassium humate, 17 parts potassium nitrate, 64 parts coconut coir extract, and 100 parts water.
[0031] 2. Preparation of coconut coir extract
[0032] Take coconut coir, soak it in 3% hydrogen peroxide for 1.5 hours, mix it with anhydrous ethanol at a ratio of 9 mL: 1 g, and reflux extract it at 65℃ and 300W ultrasonic assistance for 3.5 hours. Collect the filtrate, filter it through a 10 kDa ultrafiltration membrane, and vacuum dry it to obtain coconut coir extract.
[0033] 3. Nutrient solution preparation
[0034] Mix 10 parts potassium humate, 17 parts potassium nitrate, 64 parts coconut coir extract and 100 parts water, and stir well to obtain mixed solution 1; Add 9 parts of probiotic agent to mixed solution 1, let stand and mature for 1.5 hours to obtain camellia oil-specific nutrient solution 1.
[0035] Example 2
[0036] 1. Raw material composition (by weight): 6 parts probiotic agent (including 3 parts Bacillus subtilis powder, with a live bacteria count of 2×10⁻⁶). 9 CFU / g; 2 portions of Bacillus subtilis powder, viable count 1×10⁻⁶ 9 CFU / g; 1 part of Pseudomonas powder, viable count 0.8×10⁻⁶ 9 The ingredients include CFU / g, 8 parts potassium humate, 15 parts potassium nitrate, 60 parts coconut coir extract, and 95 parts water.
[0037] 2. Preparation of coconut coir extract
[0038] Coconut coir was soaked in 2 wt% hydrogen peroxide for 1 hour, and then mixed with anhydrous ethanol at a ratio of 8 mL: 1.2 g. The mixture was refluxed at 60 °C and 250 W with ultrasonic assistance for 3 hours. The filtrate was collected, filtered through a 5 kDa ultrafiltration membrane, and vacuum dried to obtain coconut coir extract.
[0039] 3. Nutrient solution preparation
[0040] Mix 8 parts potassium humate, 15 parts potassium nitrate, 60 parts coconut coir extract and 95 parts water, and stir well to obtain mixed solution 1; add 6 parts probiotic agent to mixed solution 1, let stand and mature for 1 hour to obtain camellia oil-specific nutrient solution 2.
[0041] Example 3
[0042] 1. Raw material composition (by weight): 12 parts probiotic agent (including 5 parts Bacillus subtilis powder, with a live bacteria count of 5 × 10⁻⁶). 9 CFU / g; 4 portions of Bacillus subtilis powder, viable count 3×10⁻⁶ 9 CFU / g; 3 portions of Pseudomonas powder, viable count 2×10⁻⁶ 9 The ingredients include CFU / g, 12 parts potassium humate, 20 parts potassium nitrate, 70 parts coconut coir extract, and 105 parts water.
[0043] 2. Preparation of coconut coir extract
[0044] Coconut coir was soaked in 4 wt% hydrogen peroxide for 2 hours, and then mixed with anhydrous ethanol at a ratio of 10 mL: 0.8 g. The mixture was refluxed at 70 °C and 350 W with ultrasonic assistance for 4 hours. The filtrate was collected, filtered through a 10 kDa ultrafiltration membrane, and vacuum dried to obtain coconut coir extract.
[0045] 3. Nutrient solution preparation
[0046] Mix 12 parts potassium humate, 20 parts potassium nitrate, 70 parts coconut coir extract and 105 parts water, and stir well to obtain mixed solution 1; add 12 parts probiotic agent to mixed solution 1, let stand and mature for 2 hours to obtain camellia oil-specific nutrient solution 3.
[0047] Example 4: An afforestation method for improving the survival rate and drought resistance of Camellia oleifera in Hainan using a special nutrient solution for Camellia oleifera.
[0048] 1. Preparatory work for afforestation
[0049] Site selection: In mid-March, a mountainous area with a pH of 6.0 and a slope of 20° was selected at Xida Farm as the planting site; Seedling selection: Select locally grown, healthy, disease-free, and 28cm tall seedlings of Camellia oleifera from Hainan. Preparation of well-rotted organic fertilizer: Select 5.0 kg of well-rotted organic fertilizer with a 90% degree of rot and a pH value of 6.5.
[0050] 2. Afforestation
[0051] (1) Land preparation and hole digging: The land preparation method is adopted, with a land preparation depth of 35cm; the planting holes are dug according to the specifications of 60cm (length) × 60cm (width) × 35cm (height), with a planting hole density of 32 holes / mu and the holes are evenly distributed.
[0052] (2) Apply decomposed organic fertilizer: Apply decomposed organic fertilizer, mix it with soil at a volume ratio of 1:5 and spread it in the lower layer of the planting hole (within a 22cm area from the bottom up), cover the upper layer with 1cm of fine soil to avoid direct contact between the organic fertilizer and the seedling roots; then backfill the top layer of soil to the level of the hole opening, and lightly press the soil in the hole to make the surface sink 4cm.
[0053] (3) Planting and watering: Place the selected Hainan camellia seedlings in the center of the planting hole, and control the planting depth so that the rootstock of the seedling is 2.5±0.5cm above the ground. After planting, build a circular water storage tray with a diameter of 70cm and a height of 12cm around the seedling.
[0054] Prepare root-setting water: Take the Camellia oleifera-specific nutrient solution 1 from Example 1, add an appropriate amount of water to dilute it, and you will get the root-setting water; slowly pour the root-setting water along the circular water storage tray to ensure that the roots are fully in contact with the root-setting water containing nutrient solution, and complete the afforestation; the watering standard for the root-setting water is that the water penetrates to the bottom of the planting hole, and the roots and surrounding soil are fully moistened, and the amount of nutrient solution used is 0.3 kg / plant.
[0055] 3. Post-afforestation management
[0056] (1) Water management: Maintain soil moisture content at 17±2% throughout the entire process; Check soil moisture every 10 days. When the soil moisture content is below 15%, replenish water in time and use water-saving irrigation method of hole irrigation to slowly seep water into the root system. Drain water during the rainy season. In Hainan, rainfall is concentrated during the rainy season. Clean the intercepting ditches and drainage channels in time to ensure smooth drainage and avoid water accumulation in the planting hole, which can lead to root rot.
[0057] (2) Nutrient management
[0058] Dilute the camellia oil-specific nutrient solution 1 from Example 1 by 500 times and set aside; Planting period 1-90 days: Water for the first time on the 15th day after planting, and water for the second time on the 30th day after planting. Water once every 15 days, for a total of 6 times. The amount of Camellia oleifera special nutrient solution 1 used each time is 2.0 kg / plant.
[0059] Water once a month 90 days after planting, and water for the first time on the 120th day. Each time, use 2.8 kg of Camellia oleifera special nutrient solution 1 per plant.
[0060] Comparative Example 1
[0061] Compared to Comparative Example 4, only the camellia-specific nutrient solution 1 of Example 1 was not used.
[0062] Experimental Example
[0063] 1. To systematically evaluate the afforestation effectiveness of different treatments, Example 4 and Comparative Example 1 were used as research subjects, and a comparative analysis was conducted based on multiple indicators. The specific comparative indicators and grading standards are as follows: Core afforestation indicators: Examining the survival rate of afforestation 30 days after planting and the retention rate of afforestation 360 days after planting; Drought-resistant related indicators: Soil moisture content, leaf wilting degree, and leaf 24-hour water loss rate were selected during the drought period from July to September; among which, the leaf wilting degree was judged according to the grading standard in Table 1; Growth and soil indicators: root length, root fresh weight, plant height growth rate, ground diameter growth rate, and available phosphorus content in the soil 360 days after transplanting.
[0064] Table 1
[0065] 2. The experimental results are shown in Table 2.
[0066] Table 2
[0067] As shown in Table 2, the Camellia oleifera of Example 4 was significantly better than that of Comparative Example 1 in terms of core afforestation effectiveness, drought resistance, growth performance, and soil improvement. The improved survival rate at 30 days and 360 days after planting fully demonstrates that the overall technical solution of this application can effectively promote the initial adaptation of the plant and enhance its long-term survival stability, thereby reducing the manpower and material costs of later replanting and reforestation. During the drought period, its higher soil moisture content, lower leaf wilting degree, and lower 24-hour leaf water loss rate highlight the dual advantages of the technical solution in soil water retention and the plant's own water retention capacity, making Camellia oleifera more adaptable to the drought environment. 360 days after planting, the root growth and aboveground growth of Camellia oleifera of Example 4 were better, and the available phosphorus content in the soil was significantly increased, forming a virtuous cycle of soil nutrient supply and vigorous plant growth. It is evident that the technical solution of Example 4 demonstrates comprehensive advantages in afforestation effectiveness, drought resistance, growth promotion, and soil improvement. It is particularly suitable for areas with frequent droughts and scarce soil phosphorus, and has outstanding value for promotion and application. It can be regarded as the preferred afforestation solution under such site conditions.
[0068] As can be seen from the above embodiments, the present invention provides a method for high-survival-rate drought-resistant afforestation of Camellia oleifera in Hainan and a method for preparing biological nutrient solution. The nutrient solution specifically for Camellia oleifera contains the following raw materials in parts by weight: 6-12 parts probiotic agent, 8-12 parts potassium humate, 15-20 parts potassium nitrate, 60-70 parts coconut coir extract, and 95-105 parts water. The present invention significantly improves the survival rate and preservation rate of Camellia oleifera afforestation through the synergistic effect of the afforestation method and the special nutrient solution for Camellia oleifera. The special nutrient solution has the effects of high temperature resistance, drought resistance and root promotion, which can effectively promote the root growth of Camellia oleifera, improve the water retention capacity of leaves, increase the available phosphorus content in the soil, and thus enhance the plant's stress resistance and growth vigor. During the drought period, the degree of wilting of Camellia oleifera leaves using the drought-resistant afforestation method of the present invention is much lower than that of traditional methods, and the soil moisture content is higher, which can effectively resist the periodic drought stress.
[0069] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A nutrient solution specifically for camellia oil, characterized in that, It contains the following ingredients in parts by weight: 6-12 parts probiotic agent, 8-12 parts potassium humate, 15-20 parts potassium nitrate, 60-70 parts coconut coir extract, and 95-105 parts water.
2. The nutrient solution according to claim 1, characterized in that, The probiotic preparation contains the following raw materials in parts by weight: 3-5 parts of Bacillus subtilis powder, 2-4 parts of Bacillus mucilaginosus powder, and 1-3 parts of Pseudomonas aeruginosa powder, wherein the viable count of the Bacillus subtilis powder is 2-5 × 10⁻⁶. 9 CFU / g, the viable count of the Bacillus subtilis powder is 1~3×10⁻⁶. 9 The viable count of the *Pseudomonas* powder is 0.8~2×10 CFU / g. 9 CFU / g.
3. The nutrient solution according to claim 2, characterized in that, The preparation method of the coconut coir extract includes the following steps: a. Soak coconut coir for 1-2 hours, then mix with anhydrous ethanol and reflux for 3-4 hours to obtain filtrate; b. Filter the filtrate through a 5-10 kDa ultrafiltration membrane and vacuum dry to obtain coconut coir extract; The solution used for soaking coconut coir in step a is 2-4 wt% hydrogen peroxide, the ratio of anhydrous ethanol to coconut coir is 8-10 mL: 0.8-1.2 g, the reflux extraction is accompanied by ultrasound, the power of the ultrasound is 250-350 W, and the temperature of the reflux extraction is 60-70℃.
4. The method for preparing the nutrient solution according to any one of claims 1 to 3, characterized in that, Includes the following steps: A. Potassium humate, potassium nitrate, coconut coir extract and water are mixed to obtain mixed solution 1; B. Mix the mixed solution 1 and the probiotic agent, and let it stand for 1-2 hours to mature.
5. The preparation method according to claim 4, characterized in that, The amount of water used in step A is 8 to 10 times the total mass of potassium humate, potassium nitrate, and coconut coir extract.
6. The application of the nutrient solution according to any one of claims 1 to 3 in improving the drought resistance and survival rate of Camellia oleifera.
7. A method for afforestation that improves the survival rate and drought resistance of Camellia oleifera using the nutrient solution described in any one of claims 1 to 3, characterized in that, Includes the following steps: (1) Select land with a pH of 5.0 to 7.0 and a slope of ≤25° as planting site in March to April or September to October, fully cultivate and prepare the land, and dig planting holes; (2) Apply 4.5-5.5 kg of well-rotted organic fertilizer to the lower layer of the planting hole, and backfill the top layer of surface soil to the level of the hole opening. Lightly press the soil in the hole to make the surface sink 3-5 cm. (3) Place the seedlings with a height of 25-30cm in the center of the planting hole. The planting depth is 2-3cm above the ground at the rootstock. After planting, build a circular water storage tray with a diameter of 60-80cm and a height of 10-15cm around the seedlings, water them to settle the roots, and complete the afforestation. (4) After afforestation, control the soil moisture content to 15-22%, and dilute the nutrient solution described in any one of claims 1-3 by 400-600 times and apply it to the roots of the seedlings.
8. The afforestation method according to claim 7, characterized in that, The depth of the full-scale land preparation in step (1) is 30~40cm, the size of the planting hole is 50~70cm×50~70cm×30~40cm, and the density of the planting hole is 30~35 holes / mu.
9. The afforestation method according to claim 8, characterized in that, The composted organic fertilizer in step (2) has a composting degree of ≥85% and a pH value of 6.0~7.
5. The method of applying the composted organic fertilizer is as follows: after mixing the composted organic fertilizer with the soil, place it in the lower layer of the planting hole. The volume ratio of the composted organic fertilizer to the soil is 1:4~6. Cover the upper layer with 1~2cm of fine soil to avoid direct contact between the composted organic fertilizer and the seedling roots. The lower layer of the planting hole is the area 20~25cm deep from the bottom of the planting hole upwards. The root-setting water in step (3) also contains the nutrient solution according to any one of claims 1 to 3, wherein the amount of nutrient solution used is 0.2 to 0.4 kg / plant.
10. The afforestation method according to claim 9, characterized in that, The watering method described in step (4) is as follows: Water every 14-20 days after transplanting for 1-90 days, for a total of 4-7 times. The amount of nutrient solution used for watering is 1.8-2.2 kg / plant / time. Water the plants 90 days after transplanting, every 28-32 days, with the amount of nutrient solution being 2.5-3.0 kg / plant / time.