A seedling raising method for promoting root growth of pinus sylvestris var. sylvestris

Abstract

The application provides a seedling raising method for promoting the growth of Pinus taiwanensis roots and relates to the technical field of Pinus taiwanensis planting. The seedling raising method mainly uses mycorrhizal soil, sterilized garden soil, mixed retting material of Hawaiian fruit green skin, over calcium superphosphate, and nutrient solution prepared by potassium nitrate, calcium nitrate, potassium dihydrogen phosphate, magnesium sulfate, short-budded polysaccharide, sodium laureth sulfate, boric acid, and copper sulfate for common seedling raising. The application overcomes the defects of the prior art, effectively promotes the growth of Pinus taiwanensis seedlings and the growth of roots, improves the seedling raising effect of Pinus taiwanensis, provides a good foundation for subsequent transplanting, and reduces the loss of Pinus taiwanensis afforestation.

Description

Technical Field

[0001] This invention relates to the field of Pinus sylvestris planting technology, specifically to a seedling cultivation method that promotes root growth in Pinus sylvestris. Background Technology

[0002] The Simao pine is a warm-temperate coniferous forest unique to the subtropical southwestern part of my country. It can be used for general construction, utility poles, mine props, railway sleepers, papermaking, furniture, and firewood. It is also rich in resin, and the trunk can be harvested for resin. The annual logging volume of Simao pine is also relatively large. In order to achieve sustainable development, the artificial afforestation of Simao pine is an important development direction at present.

[0003] With the increase in the afforestation area of ​​Pinus yunnanensis, the demand for Pinus yunnanensis seedlings has also gradually increased. Research on Pinus yunnanensis seedling cultivation technology has undergone a long process, evolving from bare-root seedling cultivation to container seedling cultivation. The application of container seedlings fundamentally improves the survival rate of Pinus yunnanensis afforestation. Container seedlings can effectively prevent physical damage to the seedling roots during the processes of seedling lifting, transportation, and planting. They are easy to handle, suitable for afforestation in difficult sites, and can effectively improve the survival rate of afforestation. This is a widely adopted advanced seedling cultivation technology. The transplant survival rate of container seedlings is mainly related to the root growth of the seedlings. A well-developed root system leads to a higher survival rate after transplanting. Therefore, improving the root growth of Pinus yunnanensis seedlings during the seedling cultivation stage is currently the main research direction for artificial seedling cultivation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a seedling cultivation method that promotes the root growth of Pinus sylvestris, effectively promoting the growth of Pinus sylvestris seedlings and the development of their root systems, enhancing the robustness of Pinus sylvestris seedlings, providing a good foundation for subsequent transplanting, and reducing losses in Pinus sylvestris afforestation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for promoting root growth in Pinus kesiya, the method comprising the following steps:

[0007] S1. Prepare the seedling substrate according to the following parts by weight: 10-15 parts mycorrhizal soil, 20-25 parts sterilized garden soil, 4-6 parts macadamia nut green peel compost, and 0.02-0.05 parts superphosphate; wherein the macadamia nut green peel compost is obtained by drying macadamia nut green peel, boiling and filtering, and then mixing the filter residue with animal manure at a mass ratio of 3-5:1 and then composting.

[0008] S2. Prepare the nutrient solution according to the following formula: potassium nitrate 0.50g / L + calcium nitrate 0.82g / L + potassium dihydrogen phosphate 0.14g / L + magnesium sulfate 0.39g / L + budding short stem enzyme polysaccharide 0.25g / L + sodium lauryl ether sulfate 20mg / L + boric acid 2.86mg / L + copper sulfate 0.08mg / L, with the remainder being water;

[0009] S3. After disinfecting the seeds of Pinus sylvestris, sow them into the seedling substrate. Before the seedlings emerge, spray with nutrient solution every 7-10 days, and after the seedlings emerge, spray with nutrient solution every 20-30 days.

[0010] Preferably, the specific preparation method of the macadamia nut green peel mixed compost includes the following steps:

[0011] S1-1. Dry the green skin of macadamia nuts until the moisture content is below 20%, then add 3-5 times the volume of water and boil at 80-90℃ for 20-30 minutes. Then press and filter, and collect the filter residue for later use.

[0012] S1-2. Mix the filter residue with animal manure at a mass ratio of 3-5:1, then compost for 3-5 months, and finally dry at 50-60℃ to obtain macadamia nut green peel mixed compost material.

[0013] Preferably, the method for drying the green skin of macadamia nuts in step S1-1 is hot air drying at a temperature of 40-50°C.

[0014] Preferably, in steps S1-2, the compost pile is turned over every 10-15 days, and water is sprayed in a timely manner to ensure that the moisture content during the composting process is 40%-50%.

[0015] Preferably, the animal excrement is at least one of sheep manure, cow manure, and chicken manure.

[0016] Preferably, the sterilized garden soil is prepared by sieving out stones and grass roots, thoroughly watering it with a 0.1%-0.5% potassium permanganate solution, then covering it with plastic film and soaking it for 1-2 hours, rinsing it with clean water, sun-drying it, and then crushing it.

[0017] Preferably, the sterilized garden soil is pulverized through a 10-20 mesh sieve.

[0018] Preferably, the method for disinfecting the Pinus sylvestris seeds is to soak the seeds in a 0.3%-0.5% potassium permanganate solution for 20-30 minutes, followed by rinsing with clean water 2-3 times.

[0019] Preferably, the seedlings are filled into seedling bags, and the disinfected Pinus sylvestris seeds are sown in the seedling bags, with the ambient temperature controlled at 20-30℃ during the seedling stage.

[0020] This invention provides a seedling cultivation method for promoting the root growth of Pinus kesiao, which has the following advantages compared with the prior art:

[0021] This invention uses a mixture of mycorrhizal soil, sterilized garden soil, macadamia nut green peel compost, and superphosphate as the seedling substrate. The macadamia nut green peel compost is made by boiling the green peel of macadamia nuts and then mixing it with manure. This effectively utilizes agricultural waste while further promoting the rooting of Pinus kesmannii seedlings and increasing the length of the taproot. Subsequently, a nutrient solution is sprayed, which contains budding short stem enzyme polysaccharide and sodium lauryl ether sulfate, etc., which can promote the growth of Pinus kesmannii seedlings to a certain extent, increase the number of lateral roots, and promote the elongation of lateral roots, thus comprehensively improving the seedling cultivation effect and facilitating the subsequent transplanting and survival of Pinus kesmannii seedlings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram showing the growth of each group of Pinus sylvestris seedlings for 120 days in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the above-ground seedling length of Pinus sylvestris seedlings in Group 1 after 120 days of growth in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the rhizome condition of Pinus sylvestris seedlings in Group 1 after 120 days of growth in an embodiment of the present invention.

[0025] Figure 4 This is a comparative schematic diagram of the growth of Pinus sylvestris seedlings in group 1 (left) and group 3 (right) after 120 days in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the rhizome condition of Pinus sylvestris seedlings in group 3 after 120 days of growth in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the rhizome condition of Pinus sylvestris seedlings in group 4 of this embodiment after 120 days of growth.

[0028] Figure 7 This is a schematic diagram of the rhizome condition of the Pinus sylvestris seedlings in group 5 of this embodiment after 120 days of growth. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The mycorrhizal soil used in the following examples is the top layer of moist soil with mycorrhizal fungi dug under the Simao pine trees; the sterilized garden soil is soil taken from nearby Simao pine plantations, after sieving out stones and grass roots, it is thoroughly irrigated with a 0.3% potassium permanganate solution, then covered with plastic film and soaked for 1.5 hours, then rinsed with clean water, and then dried by sun exposure for 3 days before being crushed and passed through a 10-mesh sieve.

[0031] Example 1:

[0032] I. Raw material preparation:

[0033] 1. Preparation of compost material A:

[0034] (1) Dry the green skin of macadamia nuts with hot air at 45°C until the moisture content is below 20%, then add 4 times the volume of water and boil at 85°C for 25 minutes, then press and filter, and collect the filter residue for later use.

[0035] (2) Mix the filter residue with cow manure at a mass ratio of 4:1, and then compost for 4 months (turn the pile over every 15 days and spray water in time to ensure that the moisture content during the composting process is 40%-50%). Finally, dry it at 55℃ to obtain compost material A.

[0036] 2. Preparation of compost material B:

[0037] Macadamia nut peels and cow dung were mixed at a mass ratio of 4:1 and then composted for 4 months (the pile was turned over every 15 days, and water was sprayed in time to ensure that the moisture content during the composting process was 40%-50%). Finally, the composted material B was dried at 55℃.

[0038] 3. Preparation of compost C:

[0039] (1) Dry the green walnut skin with hot air at 45°C until the moisture content is below 20%, then add 4 times the volume of water and boil at 85°C for 25 minutes, then press and filter, and collect the residue for later use.

[0040] (2) Mix the filter residue with cow manure at a mass ratio of 4:1, and then compost for 4 months (turn the pile over every 15 days and spray water in time to ensure that the moisture content during the composting process is 40%-50%). Finally, dry the composted material C at 55℃.

[0041] 3. Preparation of seedling substrate:

[0042] Mix and prepare different matrices according to the following formulas (parts by weight):

[0043] Substrate A: 13 parts mycorrhizal soil + 22 parts sterilized garden soil + 5 parts compost A + 0.03 parts superphosphate;

[0044] Substrate B: 13 parts mycorrhizal soil + 22 parts sterilized garden soil + 5 parts compost B + 0.03 parts superphosphate;

[0045] Substrate C: 13 parts mycorrhizal soil + 22 parts sterilized garden soil + 5 parts compost C + 0.03 parts superphosphate;

[0046] 4. Preparation of nutrient solution:

[0047] Mix and prepare different nutrient solutions according to the following formulas:

[0048] Nutrient solution A: Potassium nitrate 0.50g / L + Calcium nitrate 0.82g / L + Potassium dihydrogen phosphate 0.14g / L + Magnesium sulfate 0.39g / L + Sprouting stalk polysaccharide 0.25g / L + Sodium lauryl ether sulfate 20mg / L + Boric acid 2.86mg / L + Copper sulfate 0.08mg / L, with the remainder being water;

[0049] Nutrient solution B: Potassium nitrate 0.50g / L + Calcium nitrate 0.82g / L + Potassium dihydrogen phosphate 0.14g / L + Magnesium sulfate 0.39g / L + Sodium lauryl ether sulfate 20mg / L + Boric acid 2.86mg / L + Copper sulfate 0.08mg / L, with the remainder being water;

[0050] Nutrient solution C: Potassium nitrate 0.50 g / L + Calcium nitrate 0.82 g / L + Potassium dihydrogen phosphate 0.14 g / L + Magnesium sulfate 0.39 g / L + Sprouting stalk polysaccharide 0.25 g / L + Boric acid 2.86 mg / L + Copper sulfate 0.08 mg / L, with the remainder being water.

[0051] II. Seedling Experiment:

[0052] The seeds used in the experiment were collected from the Simao pine seed orchard of the Tropical Forestry Research Institute of Yunnan Academy of Forestry. The weight of 1,000 seeds was 18.712 g. The seeds were soaked in a 0.4% potassium permanganate solution for 25 minutes and then rinsed with clean water three times to obtain sterilized seeds for later use.

[0053] Fill the seedling containers (8cm×8cm×10cm biodegradable seedling bags) with substrates A, B, and C respectively. Then, sow the sterilized seeds into the substrates of the seedling containers, thoroughly water them, and cultivate them in a greenhouse at 20-30℃. During the cultivation period, spray nutrient solution every 8 days before seedling emergence (seedling emergence occurs after 30 days), and spray nutrient solution every 25 days after seedling emergence, for a total cultivation period of 120 days (e.g., ...). Figure 1 The specific substrate and nutrient solution settings are shown in Table 1 below:

[0054]

[0055] After 120 days of cultivation, 5 Pinus yunnanensis seedlings were randomly selected from each group, and their above-ground height, above-ground stem diameter, taproot length, taproot diameter, and number of lateral roots were measured. The specific results are shown in Table 2 below:

[0056]

[0057] As shown in the table above, Group 1, using compost A and nutrient solution A, effectively improved the growth of Pinus sylvestris seedlings, comprehensively increasing above-ground seedling height, above-ground stem thickness, taproot length, taproot thickness, and the number of lateral roots. In Group 3, compost A was replaced with compost C, i.e., macadamia nut peels were mixed with cow manure and the cooking process was omitted. The final seedling growth was significantly worse than that of Group 1. In addition, in Groups 4 and 5, the addition of budding short stem enzyme polysaccharide and sodium lauryl ether sulfate was reduced in the nutrient solution, respectively. The above-ground seedling height, above-ground stem thickness, taproot length, taproot thickness, and the number of lateral roots were all lower than those in Group 1. Among them, the number of lateral roots in Group 4 was greatly reduced, and the taproot length in Group 5 was significantly shortened.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for promoting root growth in Pinus kesiya, characterized in that, The seedling cultivation method includes the following steps: S1. Prepare the seedling substrate according to the following parts by weight: 10-15 parts mycorrhizal soil, 20-25 parts sterilized garden soil, 4-6 parts macadamia nut green peel compost, and 0.02-0.05 parts superphosphate; wherein the macadamia nut green peel compost is obtained by drying macadamia nut green peel, boiling and filtering, and then mixing the filter residue with animal manure at a mass ratio of 3-5:1 and then composting. The specific preparation method of the macadamia nut green peel mixed composting material includes the following steps: S1-1. Dry the green skin of macadamia nuts until the moisture content is below 20%, then add 3-5 times the volume of water and boil at 80-90℃ for 20-30 minutes. Then press and filter, and collect the filter residue for later use. S1-2. Mix the filter residue with animal manure at a mass ratio of 3-5:1, then compost for 3-5 months, and finally dry at 50-60℃ to obtain macadamia nut green peel mixed compost material. S2. Prepare the nutrient solution according to the following formula: potassium nitrate 0.50g / L + calcium nitrate 0.82g / L + potassium dihydrogen phosphate 0.14g / L + magnesium sulfate 0.39g / L + budding short stem enzyme polysaccharide 0.25g / L + sodium lauryl ether sulfate 20mg / L + boric acid 2.86mg / L + copper sulfate 0.08mg / L, with the remainder being water; S3. After disinfecting the seeds of Pinus sylvestris, sow them into the seedling substrate. Before the seedlings emerge, spray with nutrient solution every 7-10 days, and after the seedlings emerge, spray with nutrient solution every 20-30 days.

2. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 1, characterized in that: In step S1-1, the macadamia nut green skin is dried by hot air drying at a temperature of 40-50℃.

3. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 1, characterized in that: In steps S1-2, the compost pile is turned over every 10-15 days, and water is sprayed in a timely manner to ensure that the moisture content during the composting process is 40%-50%.

4. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 1, characterized in that: The animal feces are at least one of sheep feces, cow feces, and chicken feces.

5. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 1, characterized in that: The sterilized garden soil is prepared by sifting out stones and grass roots, thoroughly watering it with a 0.1%-0.5% potassium permanganate solution, then covering it with plastic film and soaking it for 1-2 hours. After rinsing it clean with water, it is then sun-dried and crushed.

6. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 5, characterized in that: The sterilized garden soil was pulverized through a 10-20 mesh sieve.

7. The seedling cultivation method for promoting root growth of Pinus kesiya according to claim 1, characterized in that: The method for disinfecting the Pinus sylvestris seeds is to soak the seeds in a 0.3%-0.5% potassium permanganate solution for 20-30 minutes, and then rinse them with clean water 2-3 times.

8. The seedling cultivation method for promoting root growth of Pinus kesiao according to claim 1, characterized in that: The seedling substrate is filled into the seedling bags, and the disinfected Pinus sylvestris seeds are sown in the seedling bags. The ambient temperature is controlled at 20-30℃ during the seedling period.

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