CN110915539B

CN110915539B - Technology for raising seedlings and forestation of streblus streblumea

Info

Publication number: CN110915539B
Application number: CN201911390130.XA
Authority: CN
Inventors: 陈绿林; 周元满; 王平
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-06-25
Anticipated expiration: 2039-12-30
Also published as: CN110915539A

Abstract

The invention discloses a streblus streblumea seedling afforestation technology, which comprises the following steps: seed harvesting, seed treatment, seeding of a seedling raising tray, preparation of a seedling raising container, transplanting, raising seedlings, management, planting and afforestation, and management after afforestation: moisture management, fertilization management, and others. The film-padded container seedling raising method for the streblus gigas seedling raising and forestation technology is a seedling raising method which is improved in the aspects of filling a plastic film at the bottom of a nutrition cup, selecting the materials and the size of the nutrition cup, controlling the growth range of the root system of a seedling, controlling water and the like aiming at the problems of root damage, loose soil of the nutrition cup, low stress resistance, low forestation quality and the like existing in the conventional seedling raising and outplanting process, so that the cultured seedling has the advantages of vigorous growth, complete soil of the nutrition cup, intact root system, high stress resistance and the like, the middle of the soil below the plastic film at the bottom is high, the two sides of the soil are low, the discharge of excessive water is facilitated, and the influence of ponding on the growth; meanwhile, in the watering process, the water is prevented from permeating downwards, and the water source is saved.

Description

Technology for raising seedlings and forestation of streblus streblumea

Technical Field

The invention relates to the technical field of tree cultivation, in particular to a streblus streblumea seedling raising and forestation technology.

Background

The streblus streblumea belongs to the family of Moraceae and the genus of evergreen broad-leaved small trees or large shrubs, which is a good local tree species in south China. The single leaf grows alternately, the ellipse shape is inverted oval or elliptical, the length is 2.5-6cm, the width is 2-3.5cm, and the leaf color is emerald green; the tree has the advantages of round and flat crown, wide and oval shape, beautiful tree appearance, dense branches and leaves, less pest and disease damage and the like, and is expected to be developed into the garden landscape tree. The wild streblus streblumea is distributed in Guangdong, Hainan, Guangxi and Yunnan of China.

The streblus gigantea has medicinal development value, and researches in recent years show that extracts of various parts of streblus gigantea, such as roots, stems and leaves, and the like can be used for treating different diseases, such as filariasis, leprosy, toothache, diarrhea, dysentery, cancer and the like, and simultaneously has the effects of bacteriostasis, disinsection, cancer resistance and the like, so that the streblus gigantea is a good traditional Chinese medicine. The streblus petiolata oil ether extract has a certain anti-tumor effect; the streblus streblumea leaf ethyl acetate extract is a good natural antioxidant; the extract can be used for treating fever, dysentery, gingivitis, ulcer, etc.; the streblus milk can be used as bactericide and astringent. Besides having great application value in medicine and pharmacology, streblus gigas can be used as an insecticide in agriculture, can be used as a forage grass to provide a food source for livestock, and can also be used as a biological adsorbent to adsorb lead.

The streblus streblumea plays a non-negligible role in the coastal area ecosystem of south China. The bird feed is causally sweet and becomes the food of local partial birds; the streblus streblumea habitat is frequently typhoon in south China coastal areas, and is influenced by northern cold tides all the year round, dry and wet seasons are obvious, so that the streblus streblumea gunensis has the characteristics of wind resistance, drought resistance and the like in long-term evolution, and has great significance for coastal disaster prevention and reduction in China.

Due to the fact that people have slight consciousness on excessive development and utilization of land resources and wild plant resource protection, eucalyptus is planted in a large area in a 'training mode', the important role played by the streblus gigas in ecology is not known, the streblus gigas is excessively carelessly felled, the habitat of the streblus gigas is seriously damaged, and the streblus gigas is sporadically distributed in small-area windy and watery forests and beside villages. Because the wild population and the individual number are greatly reduced, the method has positive significance for protecting the habitat of the streblus streblumea and performing seedling cultivation and afforestation to avoid extinction of the streblus streblumea.

The streblus gigas is an excellent tree species which integrates ecological value, medicinal value and ornamental value. There is a long medicinal history among people, however, studies on the breeding of seedlings and ecological forestation of streblus streblumea have not been reported. Therefore, the development of artificial breeding of streblus streblumea is of great significance to the work of species protection, artificial cultivation, reasonable development and utilization and the like. Aiming at the problems of conventional seedling raising, the invention takes improvement of afforestation quality as a starting point, starts with a seedling stage cultivation and management method, combines the characteristics of the deep root and drought resistance of the streblus indica, adopts a film-padded container seedling raising method, and improves stress resistance through reasonable control of the root system growth range and full utilization of water, thereby overcoming the problems. By implementing the method, the cultivated nursery stock has the advantages of vigorous growth, complete soil in a nutrition cup, complete root system, high afforestation survival rate and the like.

Disclosure of Invention

The invention aims to provide a streblus gigantea seedling raising and forestation technology to solve the problems of root system damage, loose soil in a nutrition cup and poor forestation quality in the conventional seedling hardening and outplanting process in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a streblus streblumea seedling afforestation technology comprises the following steps:

(1) seed harvesting: selecting plants which are strong in growth and free of diseases and insect pests as seed collecting mother trees in 5-6 months, and collecting the seeds in time when the seeds are mature;

(2) seed treatment: putting the seeds with the pulp collected in the step (1) into a plastic bag for storage for 2-3d, washing the softened pulp with a square-hole plastic sieve (10 meshes) in running water, kneading the pulp and the pulp moderately, and removing the pulp, the fruit base, the damaged seeds and the shriveled seeds floating on the water surface; spreading the cleaned seeds in a cool and ventilated place, and drying in the shade to obtain pure seeds to be sowed;

(3) seeding with a seedling tray: mixing fine sand screened by a sieve (8 meshes) with peat soil according to a ratio of 1:3, loading into a black seedling tray (50 cm 30cm 5.5 cm), the depth of the black seedling tray is 4.0cm, placing the black seedling tray under a shading net with the transmittance of 50 percent, keeping the bottom of the seedling tray 8-15 cm with the ground, spraying a carbendazim solution for disinfection and sterilization, uniformly scattering pure seeds on the seedling tray, pressing the seeds into a sand bed by using a small wood board, covering a layer of coconut husk with the thickness of 1cm on the sand bed, installing a spraying and watering system for periodically watering, keeping the seed wet, and sequentially sprouting for 7-15 days;

(4) preparing a seedling raising container: adopting a film-covered container seedling culture method, selecting a land block which is ventilated and exposed to the sun, has flat terrain and good drainage for land preparation, preparing a mixed matrix of brick red soil, river sand and plant ash with a ratio of 6:1:1, adding a base fertilizer, mixing to obtain a seedling culture matrix, and applying the base fertilizer at a rate of 400 kg/mu; the middle part of the container seedbed is 5cm higher than the two sides, and slowly transits to the two sides, and a plastic film (with the width of 1.0 m) is covered on the middle part of the container seedbed; filling the seedling raising substrate into a 16cm and 20cm non-woven cloth bag 9 (or 16cm and 16cm black nutrition cups, 9) and putting the seedling raising substrate on the non-woven cloth bag in order; uniformly spraying a seedling culture container with a carbendazim solution, and hermetically covering with a layer of plastic film to fully sterilize and disinfect;

(5) transplanting, seedling raising and management: transplanting and seedling raising can be carried out 25-30 days after the seedling raising plate is sowed and when the number of leaves is 3-5, a small opening is pried open by a seedling raising shovel in the center of a seedling raising container, the root of the seedling is placed in the small opening, soil around the seedling is lightly compacted by fingers, and the seedling can be ensured to be erected and the root system is fully contacted with the soil; building a shading net with the transmittance of 50 percent, and installing a spraying and water-sprinkling system; watering the root fixing water thoroughly for the first time, transplanting for 2 months, watering once every day at regular time, and performing in the evening; after 2 months of transplantation, watering once every 2 days, and performing in the evening, wherein the watering can be performed less or not in rainy days; the nursery stock begins to be topdressed before entering the fast growing period, and is fertilized once every 25 days by adopting a nitrogen-phosphorus-potassium compound fertilizer of 25-35 kg/mu, or is added with water and thinly fertilized; gradually uncovering the shading net 15-20 days after transplanting; weeding once every 10 days; excessive lateral branches can be properly cut off to promote high growth; after 10-11 months, the ground diameter of the nursery stock reaches 6mm, the height of the nursery stock reaches 40cm, and then the nursery stock can be taken out for forestation;

(6) planting and afforesting: in the middle and last ten days of 10 months, selecting a land block with flat terrain and good drainage for hole-shaped soil preparation, wherein the plant-row spacing is 2.0m 2.5m-3.0 m 3.5 m; selecting current-year container seedlings without diseases and insect pests as afforestation seedlings, during afforestation, using a soil drilling machine with a drill bit of 20cm in diameter to drill transplanting seedling holes of 25cm, 25cm and 30cm in specification, applying 300g of base fertilizer to the bottoms of the seedling holes, flattening, covering hole soil of 7cm in thickness, wherein the non-woven fabric container does not need to be unpacked, if a black plastic container is used, the bag needs to be unpacked, the seedlings are placed in the holes, the seedlings are dry and upright, the hole soil is backfilled, and the soil surface is made into small wools so as to store water;

(7) managing after forestation:

moisture management: watering thoroughly the seedlings with root fixing water for the first time after planting, watering for 1 time every day in the evening after 3-21 days; watering for 1 time every 2 days for 22-40 days; after planting for 40 days, watering less or no watering;

secondly, fertilization management: a hole application method is adopted, the application amount of the nitrogen-phosphorus-potassium compound fertilizer is respectively 50-100 g, 100-200 g and 250-300 g in the 1 st year, the 2 nd year and the 3 rd year after afforestation, the fertilizer is applied for 3-5 times in the growing season every year, a small hole with the depth of 15cm is drilled at the position 30-70 cm away from the nursery stock by a soil drilling machine with a drill bit with the diameter of 10cm, the fertilizer is placed in the hole and covered by soil; in addition, 0.8-1.2 kg of decomposed organic fertilizer needs to be applied to each seedling in the middle of 11 months; fertilizing for 2 times every year after 3 years of forestation, and applying 300-400 g of compound fertilizer in 6-7 months for the 1 st time and applying 1.5kg of decomposed organic fertilizer in each seedling in 11 months for the 2 nd time by adopting a hole-fertilization method;

(iii) others: loosening soil and weeding 4-6 times every year within 3 years after afforestation, and covering the removed weeds around the plant rhizosphere; 3 years after afforestation, loosening the soil and weeding for 2-3 times every year; economic crops such as peanuts, soybeans, vegetables and the like can be interplanted intermittently in the young forest, so that the land utilization rate is improved; and (3) carrying out moderate pruning on the nursery stock in due time, cutting off lateral branches below 1/2 of the height of the nursery stock until the height of the nursery stock under the branches reaches 1.4m, then using weak pruning, and cutting off sprouts below 1.4m of the height of the tree in due time in the period to promote high growth.

Preferably, the mother tree in the step (1) is a female plant of a male and female heterostrain in a mass-production state.

Preferably, the judgment of the seed maturation standard in the harvesting in the step (1) is that the pericarp turns yellow from light green to yellow or more than 2 bracts are unfolded in 5-6 months, and the seed is mature.

Preferably, in the step (2), the seeds are treated, and the flesh outside the fresh seeds is difficult to remove and needs to be put into plastic bags for storage for 2-3 days.

Preferably, the concentration of the carbendazim solution in the steps (3) and (4) is 500 ppm.

Preferably, the base fertilizer in the steps (4) and (6) is a biological organic fertilizer (Froude Wang).

Preferably, the nitrogen-phosphorus-potassium compound fertilizer in the steps (5) and (7) is a Xingwangbao compound fertilizer.

Preferably, the afforestation nursery stock in the step (6) is a container nursery stock which grows robustly and strongly and has the height of 40cm and the ground diameter of 6mm and is carried out in the middle and last ten days of 10 months.

Preferably, the soil drilling machine in the step (6) is a Wuyang Honda 78CC four-stroke drilling machine.

Preferably, the moderate pruning is carried out on the nursery stock in the step (7) at the right time, lateral branches below the height 1/2 of the nursery stock are cut off, and the weak pruning is carried out when the height below the branch reaches 1.4 m.

Compared with the prior art, the invention has the beneficial effects that:

(1) a film-covered container seedling raising method aims at solving the problems of root damage, loose soil in a nutrition cup, low stress resistance, low afforestation quality and the like existing in the conventional seedling raising and outplanting process, and improves the aspects of plastic film covering at the bottom of the nutrition cup, selection of materials and sizes of the nutrition cup, control of the seedling root system growth range, water control and the like, so that the cultured seedlings have the advantages of vigorous growth, complete soil in the nutrition cup, intact root systems, strong stress resistance and the like.

(2) The middle of the soil below the plastic film at the bottom is high, and the two sides of the soil are low, so that the drainage of excessive water is facilitated, and the influence of accumulated water on the growth of seedlings is avoided; meanwhile, in the watering process, the water is prevented from permeating downwards, and the water source is saved.

(3) In the middle and last ten days of 10 months, the seedling in the current year is as high as 40cm, the ground diameter is as large as 6mm, and the method is suitable for afforestation in autumn; the nursery stock passes the seedling recovering stage in autumn, and reasonable water and fertilizer management is added, so that the content of nutrient elements in the nursery stock can be increased, the stress resistance of the nursery stock is improved, and the normal growth and development of the nursery stock in the next year are ensured.

(4) After the afforestation is carried out for 21d, the watering frequency of the nursery stock is reduced, so that the nursery stock can gradually adapt to the natural environment.

(5) The seedling holes punched by the soil drilling machine have good quality, the hole soil is loose, and the afforestation efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a seed-collecting stock plant;

FIG. 2 is a schematic diagram of mature fruit on mother plant;

FIG. 3 is a schematic view of a clean seed;

FIG. 4 is a schematic view of seedlings sowed on a seedling tray for 20-25 d;

FIG. 5 is a schematic view of a nonwoven container seedling 25 d;

FIG. 6 is a schematic diagram of a qualified afforestation seedling;

FIG. 7 is a schematic longitudinal sectional view of the seedling bed;

FIG. 8 is a schematic diagram of a seedling of a black container seedling 90 d;

FIG. 9 is a schematic view of a root ball of a nursery stock for afforestation;

FIG. 10 is a schematic view of seedlings in an afforestation field.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, the present invention provides a technical solution,

a technology for raising seedlings and forestation of streblus streblumea comprises the following specific implementation methods:

(1) seed harvesting: selecting plants which are strong in growth and free of diseases and insect pests as seed collecting parent trees in 5-6 months, wherein the parent trees are female plants of male and female plants in a group growth state, harvesting in time when seeds are mature, judging the seed maturation standard during harvesting, and judging that the fruit peels are turned from light green to yellow or more than 2 bracts are unfolded as the seeds are mature in 5-6 months;

(2) seed treatment: putting the seeds with the pulp collected in the step (1) into a plastic bag for storage for 2-3d, washing the softened pulp with a square-hole plastic sieve (10 meshes) in running water, moderately kneading, removing the pulp, the fruit base, the damaged seeds and the shriveled seeds floating on the water surface, wherein the pulp outside the fresh seeds is difficult to remove and needs to be put into the plastic bag for storage for 2-3 d; spreading the cleaned seeds in a cool and ventilated place, and drying in the shade to obtain pure seeds to be sowed;

(3) seeding with a seedling tray: mixing fine sand screened by a sieve (8 meshes) with peat soil according to a ratio of 1:3, loading into a black seedling tray (50 cm 30cm 5.5 cm), the depth of the seedling tray is 4.0cm, placing the seedling tray under a shading net with the transmittance of 50%, keeping the bottom of the seedling tray 8-15 cm from the ground, spraying a carbendazim solution to sterilize, wherein the concentration of the carbendazim solution is 500ppm, uniformly scattering pure seeds on the seedling tray, pressing the seeds by using a small wood board to enable the seeds to sink into a sand bed, covering a layer of coco coir with the thickness of 1cm on the seedling tray, installing a spray water spraying system to regularly spray water, keeping the seeds moist, and sequentially sprouting for 7-15 days;

(4) preparing a seedling raising container: adopting a film-covered container seedling culture method, selecting a land block which is ventilated and exposed to the sun, has flat terrain and good drainage for land preparation, preparing a mixed matrix of brick red soil, river sand and plant ash with a ratio of 6:1:1, adding a base fertilizer, mixing, and using the mixture as a seedling culture matrix, wherein the base fertilizer is a biological organic fertilizer, and the application amount is 400 kg/mu; the middle part of the container seedbed is 5cm higher than the two sides, and slowly transits to the two sides, and a plastic film (with the width of 1.0 m) is covered on the middle part of the container seedbed; filling the seedling raising substrate into a 16cm and 20cm non-woven cloth bag 9 (or 16cm and 16cm black nutrition cups, 9) and putting the seedling raising substrate on the non-woven cloth bag in order; uniformly spraying a seedling culture container with a carbendazim solution, wherein the concentration of the carbendazim solution is 500ppm, and hermetically covering with a layer of plastic film to fully sterilize and disinfect;

(5) transplanting, seedling raising and management: transplanting and seedling raising can be carried out 25-30 days after the seedling raising plate is sowed and when the number of leaves is 3-5, a small opening is pried open by a seedling raising shovel in the center of a seedling raising container, the root of the seedling is placed in the small opening, soil around the seedling is lightly compacted by fingers, and the seedling can be ensured to be erected and the root system is fully contacted with the soil; building a shading net with the transmittance of 50 percent, and installing a spraying and water-sprinkling system; watering the root fixing water thoroughly for the first time, transplanting for 2 months, watering once every day at regular time, and performing in the evening; after 2 months of transplantation, watering once every 2 days, and performing in the evening, wherein the watering can be performed less or not in rainy days; the method comprises the following steps of starting soil topdressing before nursery stocks enter a fast growing period, adopting 25-35 kg/mu of nitrogen-phosphorus-potassium compound fertilizer, wherein the nitrogen-phosphorus-potassium compound fertilizer is Xingwangbao compound fertilizer, and applying the compound fertilizer once every 25 days, or adding water into organic fertilizer for thin application; gradually uncovering the shading net 15-20 days after transplanting; weeding once every 10 days; excessive lateral branches can be properly cut off to promote high growth; after 10-11 months, the ground diameter of the nursery stock reaches 6mm, the height of the nursery stock reaches 40cm, and then the nursery stock can be taken out for forestation;

(6) planting and afforesting: in the middle and last ten days of 10 months, selecting a land block with flat terrain and good drainage for hole-shaped soil preparation, wherein the row spacing is 2.0m 2.5 m-3.0 m 3.5 m; selecting current-year container seedlings without diseases and insect pests as afforestation seedlings, wherein the afforestation seedlings are strong current-year container seedlings with the height of 40cm and the ground diameter of 6mm, the current-year container seedlings are planted in the middle and last ten days of 10 months, when the afforestation is carried out, a soil drilling machine with a drill bit of 20cm diameter is used, the soil drilling machine is a five-sheep Honda 78CC four-stroke land drilling machine, transplanting seedling holes with the specification of 25cm, 25cm and 30cm are drilled, 300g of base fertilizer is applied to the bottoms of the seedling holes and is spread, the base fertilizer is bio-organic fertilizer, hole soil with the thickness of 7cm is covered, non-woven fabric containers do not need to be unpacked, if black plastic containers are used, the seedlings are placed in the holes, the seedling stems are upright, backfilling soil is carried out, and the soil surface is made into small wo;

(7) managing after forestation:

secondly, fertilization management: a hole fertilization method is adopted, the application amount of the nitrogen-phosphorus-potassium compound fertilizer is respectively 50-100 g, 100-200 g and 250-300 g in the 1 st, 2 nd and 3 rd years after afforestation, the nitrogen-phosphorus-potassium compound fertilizer is a Xingwangbao compound fertilizer, the nitrogen-phosphorus-potassium compound fertilizer is applied for 3-5 times in the growing season of each year, a small hole with the depth of 15cm is drilled at the position 30-70 cm away from the nursery stock by a soil drilling machine with a drill bit with the diameter of 10cm, and the fertilizer is placed in the small hole and covered by soil; in addition, 0.8-1.2 kg of decomposed organic fertilizer needs to be applied to each seedling in the middle of 11 months; fertilizing for 2 times every year after 3 years of forestation, and applying 300-400 g of compound fertilizer in 6-7 months for the 1 st time and applying 1.5kg of decomposed organic fertilizer in each seedling in 11 months for the 2 nd time by adopting a hole-fertilization method;

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the above-described embodiments, or equivalent substitutions and modifications may be made to some of the technical features of the above-described embodiments, and any modifications, equivalents, improvements, etc. within the spirit and principle of the present invention are within the scope of the present invention.

Claims

1. A streblus streblumea seedling afforestation technology is characterized by comprising the following steps:

(2) seed treatment: putting the seeds with the pulp collected in the step (1) into a plastic bag for storage for 2-3 days, washing the softened pulp with a 10-mesh square-hole plastic sieve in flowing water, kneading the pulp and the pulp moderately, removing the pulp, the fruit base, the damaged seeds and the shriveled seeds floating on the water surface; spreading the cleaned seeds in a cool and ventilated place, and drying in the shade to obtain pure seeds to be sowed;

(3) seeding with a seedling tray: mixing fine sand screened by an 8-mesh sieve with peat soil according to a ratio of 1:3, loading the mixture into a black seedling raising tray with the depth of 4.0cm and the transmittance of 50 percent, placing the seedling raising tray under a shading net, keeping the bottom of the seedling raising tray 8-15 cm away from the ground, spraying a carbendazim solution for disinfection and sterilization, uniformly scattering pure seeds on the seedling raising tray, pressing the seeds into a sand bed by using a small wood board, covering a layer of coconut husk with the thickness of 1cm on the sand bed, installing a spraying and watering system for periodically watering, keeping the seed wet, and sequentially sprouting for 7-15 days;

(4) preparing a seedling raising container: adopting a film-covered container seedling culture method, selecting a land block which is ventilated and exposed to the sun, has flat terrain and good drainage for land preparation, preparing a mixed matrix of brick red soil, river sand and plant ash with a ratio of 6:1:1, adding a base fertilizer, mixing to obtain a seedling culture matrix, and applying the base fertilizer at a rate of 400 kg/mu; the middle part of the container seedbed is 5cm higher than the two sides, and slowly transits to the two sides, and a plastic film with the width of 1.0m is covered on the middle part of the container seedbed; filling the seedling culture substrate into a 16cm × 20cm non-woven cloth bag 9 or a 16cm × 16cm black nutrition cup 9, and putting the seedling culture substrate on the non-woven cloth bag in order; uniformly spraying a seedling culture container with a carbendazim solution, and hermetically covering with a layer of plastic film to fully sterilize and disinfect;

(5) transplanting, seedling raising and management: transplanting and seedling raising can be carried out 25-30 days after the seedling raising plate is sowed and when the number of leaves is 3-5, a small opening is pried open by a seedling raising shovel in the center of a seedling raising container, the root of the seedling is placed in the small opening, soil around the seedling is lightly compacted by fingers, and the seedling can be ensured to be erected and the root system is fully contacted with the soil; building a shading net with the transmittance of 50 percent, and installing a spraying and water-sprinkling system; watering the root fixing water thoroughly for the first time, transplanting for 2 months, watering once every day at regular time, and performing in the evening; after 2 months of transplantation, watering once every 2 days in the evening, and watering less or not if meeting rainy days; the nursery stock begins to be topdressed before entering the fast growing period, and is fertilized once every 25 days by adopting a nitrogen-phosphorus-potassium compound fertilizer of 25-35 kg/mu, or is added with water and thinly fertilized; gradually uncovering the shading net 15-20 days after transplanting; weeding once every 10 days; excessive lateral branches are properly cut off to promote high growth; after 10 months, the ground diameter of the nursery stock reaches 6mm, the height of the nursery stock reaches 40cm, and then the nursery stock can be taken out for forestation;

(6) planting and afforesting: in the middle and last ten days of 10 months, selecting a land block with flat terrain and good drainage for hole-shaped soil preparation, wherein the row spacing is 2.0m multiplied by 2.5m to 3.0m multiplied by 3.5 m; selecting current-year container seedlings without diseases and insect pests as afforestation seedlings, during afforestation, using a soil drilling machine with a drill bit of 20cm diameter to drill transplanting seedling holes of 25cm multiplied by 30cm, applying 300g of base fertilizer to the bottoms of the seedling holes, flattening, covering hole soil of 7cm thickness, wherein the non-woven fabric container does not need to be unpacked, if the non-woven fabric container is a black plastic container, the seedlings are placed in the holes, the seedlings are dry and upright, the hole soil is backfilled, and the soil surface is made into small wools so as to store water;

(7) managing after forestation:

moisture management: watering thoroughly the seedlings with root fixing water for the first time after planting, watering for 1 time every day in the evening after 3-21 days; watering for 1 time every 2 days for 22-40 days after planting; after planting for 40 days, watering little or no;

(iii) others: loosening soil and weeding 4-6 times every year within 3 years after afforestation, and covering the removed weeds around the plant rhizosphere; 3 years after afforestation, loosening the soil and weeding for 2-3 times every year; the economic crops such as peanuts, soybeans and vegetables are interplanted in the young forest intermittently, so that the land utilization rate is improved; carrying out moderate pruning on the nursery stock in due time, cutting off lateral branches below 1/2 of the height of the nursery stock until the height of the nursery stock under the branches reaches 1.4m, then using weak pruning, cutting off sprouts below 1.4m of the height of the tree in due time in the period, and promoting high growth;

the mother tree in the step (1) is a female plant of a male and female heterostrain in a group growing state;

judging the seed maturity standard in the harvesting in the step (1), wherein the mature seeds are judged to be mature when the fruit peels turn yellow from light green to yellow or more than 2 bracts are unfolded in 5-6 months;

in the step (2), the seeds are treated, so that the pulp outside the fresh seeds is difficult to remove completely, and the fresh seeds need to be put into plastic bags for storage for 2-3 d;

the concentration of the carbendazim solution in the steps (3) and (4) is 500 ppm;

the base fertilizer in the steps (4) and (6) is a biological organic fertilizer Froude;

the nitrogen-phosphorus-potassium compound fertilizer in the steps (5) and (7) is a Xingwangbao compound fertilizer;

the afforestation nursery stock in the step (6) is a container nursery stock which grows robustly and strongly and has the height of 40cm and the ground diameter of 6mm and is grown in the current year, and is carried out in the middle and last ten days of 10 months;

the soil drilling machine in the step (6) is a Wuyang Honda 78CC four-stroke ground drilling machine.