CN105612865A - Direct seeding forestation seed for eroded forest lands and method for preparing direct seeding forestation seeds - Google Patents
Direct seeding forestation seed for eroded forest lands and method for preparing direct seeding forestation seeds Download PDFInfo
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- CN105612865A CN105612865A CN201610071656.1A CN201610071656A CN105612865A CN 105612865 A CN105612865 A CN 105612865A CN 201610071656 A CN201610071656 A CN 201610071656A CN 105612865 A CN105612865 A CN 105612865A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/06—Coating or dressing seed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/40—Afforestation or reforestation
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Abstract
The invention discloses a direct seeding forestation seed for eroded forest lands. The direct seeding forestation seed is sequentially coated with an inner coating layer and an outer coating layer from the inside to the outside, and the inner coating layer is a multifunctional coating layer and comprises biological activated carbon, clay minerals, nutrient water retention materials and adhesive; the direct seeding forestation seed coated with the inner coating layer is impregnated in outer coating layer solution to form the outer coating layer. A method for preparing the direct seeding forestation seed includes preparing materials; forming the inner coating layer; primarily drying the direct seeding forestation seed in the air; forming the outer coating layer; secondarily drying the direct seeding forestation seed in the air. The direct seeding forestation seed for the eroded forest lands and the method have the advantages that the direct seeding forestation seed comprises two layers of coating materials, nutrient and water mainly can be provided by the inner layer for seed germination, the outer layer mainly has a function for adhering the direct seeding forestation seed with other minerals in soil, accordingly, loss of the direct seeding forestation seed can be prevented, seed germination and growth ecological environments can be particularly effectively improved in severely eroded forest lands, the tree species cost can be reduced, and the tree planting success rate can be increased; the method for preparing the direct seeding forestation seed for the eroded forest lands is easy to implement and suitable for industrial large-scale production, and the direct seeding forestation seed is convenient to prepare and low in cost.
Description
Technical field
The present invention relates to direct seeding forestation technology, be specifically related to a kind of seed corroding forest land direct seeding forestation and preparation method thereof.
Background technology
China is the country of a severe water and soil erosion, vegetation coverage wretched insufficiency, ecological environment serious degradation, for avoiding environment to worsen further, affects people's lives environment and healthy, recovers vegetation and becomes currently main solution.
In prior art, plant trees in areas with soil-erosion problems, mainly through hand excavation, be enriched with certain soil and carry out artificial afforestration, not only cost intensive, plant survival rate, also destroy local original landforms ecological environment. And adopt traditional live pelletize, on the one hand owing to soil environment is severe, seed is germination and growth not easily, and on the other hand, seed is also faced with the risk of loss. Plantation survival rate is improved, it is ensured that tree growth is grown, and oneself becomes a difficult point, is also the important directions of Ecological Restoration Project technical research in areas with soil-erosion problems.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of seed corroding forest land direct seeding forestation;
Another object of the present invention is to the preparation method providing this kind to corrode forest land direct seeding forestation seed.
The purpose of the present invention is achieved through the following technical solutions: a kind of seed corroding forest land direct seeding forestation, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 45��55, clay mineral: 40��50, nutrient water-retention material: 0.1��0.3, binding agent: 0.5��1.5; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, and exterior coating solution is made up of the raw material of following weight parts: ammonia: 100��150, starch: 30��40, iron sesquioxide: 1��3; Wherein, the weight/mass percentage composition of described ammonia ammonia is 2��5%.
Further, described seed is 1:1��3 with the weight ratio of interior coatings. .
Further, described charcoal adopts following methods to prepare: by wooden or bamboo material in anaerobic or oxygen content under the environment lower than 3%, 350��700 DEG C of Pintsch process 4��12h, cooling down, being crushed to fineness of the particles is 100 orders.
Further, described clay mineral is attapulgite clay and one or more combination in bentonite, montmorillonite, Vermiculitum or perlite, and the content of attapulgite clay be the 50��60% of clay mineral, the fineness of clay mineral be 100 orders.
Further, described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 97��99, water-absorbing resins: 1��3.
Further, described sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 4.8��6.5, and fineness is 100 orders.
Further, described water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing.
Further, described binding agent is one or more combination in carboxymethyl cellulose, polyacrylic acid, ammonium humate or sodium humate.
A kind of preparation method of the seed corroding forest land direct seeding forestation, it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 25��35%, stir and form the interior coatings mixture of seed, seed and interior coatings mixture are put into seed pelleting machine carries out coating;
S3. once dry: the seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the seed once dried is put into dipping 2��5min in exterior coating solution;
S5. dry for two times: the seed forming exterior coating in step S4 is dried naturally to water content < 10%, namely prepare the seed corroding forest land direct seeding forestation.
Eroded forest land is often that the gradient is relatively big, clay is low by water erosion, content in soil. Therefore, under this land occupation condition, afforestation seeding needs special way, in the present invention:
For internal layer coating material adopts the coating material of clay mineral general in soil, and adopt the viscosity with attapulgite clay, ensure the effect of coating, the consumption that the consumption of coating clay mineral is higher than in conventional formulation clay, mainly consider that Eroded timbered soil clay content is very low, there is no enough clays, it is difficult to ensure that the sprouting of plantation; Meanwhile, by the use of charcoal and high-quality plants fiber, not only can ensure that water conservation, but also venting capability can have been improved, the offer good condition of seed germination can be provided;
For outer layer coating, it is mainly used in the seed fixation in Eroded forest land. Adopt ammonia, starch and three kinds of combinations of materials of iron sesquioxide, there is following multi-efficiency: ammonia is provided that higher pH environment, be conducive to starch and the performance of iron sesquioxide cementation, simultaneously ammonium ion is also that the most important nitrogen of plant is one of former, and suitable nitrogen will promote seed germination, growth; Starch is adhesive material, and it can play certain cementation in a short time, and itself is again the carbon source of microbial reproduction; And iron sesquioxide in the basic conditions, with the silicate crystal generation electrochemical reaction in soil, can form relatively stable cohesive body, it is ensured that sowing seed is not washed away in a long time.
The invention have the advantages that the seed of erosion forest land direct seeding forestation provided by the invention, it is made up of two-layered coating material, internal layer is mainly seed germination and provides nutrient and moisture, outer layer mainly provides with the adhesive function of other mineral in soil, seed is prevented to run off, especially in Eroded forest land, the ecological environment of seed germination growth, reduction seeds cost can be effectively improved, improve tree planting success rate; The preparation method of direct seeding forestation seed in erosion forest land provided by the invention is simple to operate, preparation is convenient, cost is low, suitable in industrialization large-scale production.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, and protection scope of the present invention is not limited to the following stated:
Embodiment 1:
A kind of seed corroding forest land direct seeding forestation, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, the weight ratio of described seed and interior coatings is 1:1, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 45, clay mineral: 40, nutrient water-retention material: 0.1, carboxymethyl cellulose: 0.5; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, exterior coating solution is made up of the raw material of following weight parts: ammonia: 100, starch: 30, iron sesquioxide: 1, wherein, the weight/mass percentage composition of described ammonia ammonia is 2%.
Described charcoal adopts following methods to prepare: by wood materials under the environment of anaerobic, 350 DEG C of Pintsch process 4h, and cooling down, being crushed to fineness of the particles is 100 orders;
Described clay mineral is attapulgite clay and bentonite combination, and the content of attapulgite clay be the 50% of clay mineral, the fineness of clay mineral be 100 orders;
Described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 97, water-absorbing resins: 1; Sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 4.8, and fineness is 100 orders; Water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing;
The preparation method of the seed of above-mentioned erosion forest land direct seeding forestation, it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 25%, stir and form the interior coatings mixture of seed, Caulis Seu Folium Lespedezae Bicoloris seed and interior coatings mixture are put into seed pelleting machine carries out coating;
S3. once dry: the Caulis Seu Folium Lespedezae Bicoloris seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the Caulis Seu Folium Lespedezae Bicoloris seed once dried is put into dipping 2min in exterior coating solution;
S5. dry for two times: naturally being dried by the seed forming exterior coating in step S4 to water content is 9%, namely prepares the Caulis Seu Folium Lespedezae Bicoloris seed corroding forest land direct seeding forestation.
Embodiment 2:
A kind of seed corroding forest land direct seeding forestation, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, the weight ratio of described seed and interior coatings is 1:3, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 55, clay mineral: 50, nutrient water-retention material: 0.3, binding agent: 1.5; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, exterior coating solution is made up of the raw material of following weight parts: ammonia: 150, starch: 40, iron sesquioxide: 3, wherein, the weight/mass percentage composition of described ammonia ammonia is 5%.
Described charcoal adopts following methods to prepare: by bamboo material under the oxygen content environment lower than 3%, 700 DEG C of Pintsch process 12h, and cooling down, being crushed to fineness of the particles is 100 orders;
Described clay mineral is attapulgite clay and bentonite, montmorillonite combination, and the content of attapulgite clay be the 60% of clay mineral, the fineness of clay mineral be 100 orders;
Described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 99, water-absorbing resins: 3; Sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 6.5, and fineness is 100 orders; Water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing;
Described binding agent is carboxymethyl cellulose and polyacrylic combination, and weight ratio is 2:1.
The preparation method of the seed of above-mentioned erosion forest land direct seeding forestation, it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 35%, stir and form the interior coatings mixture of seed, false indigo seed and interior coatings mixture are put into seed pelleting machine carries out coating;
S3. once dry: the false indigo seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the false indigo seed once dried is put into dipping 5min in exterior coating solution;
S5. dry for two times: naturally being dried by the seed forming exterior coating in step S4 to water content is 8%, namely prepares the false indigo seed corroding forest land direct seeding forestation.
Embodiment 3:
A kind of seed corroding forest land direct seeding forestation, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, the weight ratio of described seed and interior coatings is 1:1.4, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 48, clay mineral: 44, nutrient water-retention material: 0.18, binding agent: 1; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, exterior coating solution is made up of the raw material of following weight parts: ammonia: 125, starch: 33, iron sesquioxide: 1.8, wherein, the weight/mass percentage composition of described ammonia ammonia is 3%.
Described charcoal adopts following methods to prepare: by wooden under the oxygen content environment lower than 3%, 500 DEG C of Pintsch process 7h, and cooling down, being crushed to fineness of the particles is 100 orders;
Described clay mineral be attapulgite clay with bentonite, montmorillonite, Vermiculitum combination, and the content of attapulgite clay be the 55% of clay mineral, the fineness of clay mineral be 100 orders;
Described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 98, water-absorbing resins: 1.8; Sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 5, and fineness is 100 orders; Water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing;
Described binding agent is the combination of carboxymethyl cellulose, polyacrylic acid and ammonium humate, and weight ratio is 1:2:3:1.
The preparation method of the seed of above-mentioned erosion forest land direct seeding forestation, it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 28%, stir and form the interior coatings mixture of seed, Eucalyptus seed and interior coatings mixture are put into seed pelleting machine carries out coating;
S3. once dry: the Eucalyptus seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the Eucalyptus seed once dried is put into dipping 3min in exterior coating solution;
S5. dry for two times: naturally being dried by the Eucalyptus seed forming exterior coating in step S4 to water content is 7.5%, namely prepares the Eucalyptus seed corroding forest land direct seeding forestation.
Embodiment 4:
A kind of seed corroding forest land direct seeding forestation, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, the weight ratio of described seed and interior coatings is 1:1.8, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 52, clay mineral: 48, nutrient water-retention material: 0.25, binding agent: 1.3; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, exterior coating solution is made up of the raw material of following weight parts: ammonia: 140, starch: 38, iron sesquioxide: 2.6, wherein, the weight/mass percentage composition of described ammonia ammonia is 4%.
Described charcoal adopts following methods to prepare: by bamboo material under the environment of anaerobic, 650 DEG C of Pintsch process 10h, and cooling down, being crushed to fineness of the particles is 100 orders;
Described clay mineral is attapulgite clay and bentonite, montmorillonite, Vermiculitum, perlitic combination, and the content of attapulgite clay be the 58% of clay mineral, the fineness of clay mineral be 100 orders;
Described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 98.5, water-absorbing resins: 2.6; Sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 6.3, and fineness is 100 orders; Water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing;
Described binding agent is the combination of carboxymethyl cellulose, polyacrylic acid, ammonium humate and sodium humate, mixes with arbitrary proportion.
The preparation method of the seed of above-mentioned erosion forest land direct seeding forestation, it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 32%, stir and form the interior coatings mixture of seed, seed and interior coatings mixture are put into pinaster seed pelleting machine carries out coating;
S3. once dry: the pinaster seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the pinaster seed once dried is put into dipping 4min in exterior coating solution;
S5. dry for two times: naturally being dried by the seed forming exterior coating in step S4 to water content is 6.8%, namely prepares the pinaster seed corroding forest land direct seeding forestation.
Below by way of description of test beneficial effects of the present invention:
1., with Caulis Seu Folium Lespedezae Bicoloris seed as direct seeding forestation seed, this plant belongs to pulse family, undershrub, has very strong water and soil conservation function and soil improvement ability, seed brown, obovate. After the Caulis Seu Folium Lespedezae Bicoloris seed embodiment 1 prepared is coated, dry granular is increased to 44g by the 21g being uncoated first every, from shape size, weight, all obtains increase, be conducive to precision drilling and scattered seeds by airplane for afforestation.
This seed is sown in the timbered soil by earthquake effect of the Li County in May, 2014, gradient 25-30 degree, 2.5 kilograms (pure seed weight) of every mu of sowing, in October, 2014 is investigated, percentage of seedgermination is not had coating by 18.8%(, comparison) bring up to 55.2%(coating), in JIUYUE, 2015 investigation, the average height of comparison is 22.6 centimetres, and coated average height reaches 36.1 centimetres. Control experiment obtains, and adopts this packaging technique, can greatly reduce sowing cost, improves the coverage of Eroded forest land vegetation, it is achieved that the purpose quickly repaired.
2., with false indigo seed as direct seeding forestation seed, this plant belongs to pulse family, shrub, has good improvement soil function. Seed is flat, kidney shape. After the false indigo seed embodiment 2 prepared is coated, mass of 1000 kernel is increased to 58.1g by the 25.8g of original seed every, all obtains increase, be conducive to precision drilling and scattered seeds by airplane for afforestation from shape size, weight.
This seed is sown in the timbered soil by earthquake effect of the Li County in May, 2014, gradient 25-30 degree, 2.5 kilograms (pure seed weight) of every mu of sowing, in October, 2014 is investigated, and percentage of seedgermination is not had coating by 26.9%(, comparison) bring up to 41.1%(coating), in JIUYUE, 2015 investigation, the average height of comparison is 25.4 centimetres, coverage 12%, and coated average height reaches 31.2 centimetres, coverage 19%. Control experiment obtains, and adopts this packaging technique, can greatly reduce sowing cost, improves the speed of growth and the coverage of Eroded forest land vegetation.
Claims (9)
1. the seed corroding forest land direct seeding forestation, it is characterized in that, described seed is enclosed with interior coatings and exterior coating successively from inside to outside, described interior coatings is Multifunctional coating layer, is made up of the raw material of following weight parts: charcoal: 45��55, clay mineral: 40��50, nutrient water-retention material: 0.1��0.3, binding agent: 0.5��1.5; Described exterior coating is that the seed being enclosed with interior coatings is immersed in exterior coating solution and is formed, and exterior coating solution is made up of the raw material of following weight parts: ammonia: 100��150, starch: 30��40, iron sesquioxide: 1��3; Wherein, the weight/mass percentage composition of described ammonia ammonia is 2��5%.
2. a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterised in that the weight ratio of described seed and interior coatings is 1:1��3.
3. a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterized in that, described charcoal adopts following methods to prepare: by wooden or bamboo material in anaerobic or oxygen content under the environment lower than 3%, 350��700 DEG C of Pintsch process 4��12h, cooling down, being crushed to fineness of the particles is 100 orders.
4. a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterized in that, described clay mineral is attapulgite clay and one or more combination in bentonite, montmorillonite, Vermiculitum or perlite, and the content of attapulgite clay be the 50��60% of clay mineral, the fineness of clay mineral be 100 orders.
5. a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterised in that described nutrient water-retention material is made up of the raw material of following weight portion: sponge: 97��99, water-absorbing resins: 1��3.
6. a kind of seed corroding forest land direct seeding forestation according to claim 5, it is characterized in that, described sponge is peat, and content of cellulose > 35%, content of organic matter > 65%, pH value are 4.8��6.5, and fineness is 100 orders.
7. a kind of seed corroding forest land direct seeding forestation according to claim 5, it is characterised in that described water-absorbing resins is acrylamide and acrylic acid salt crosslinking copolymerization thing.
8. a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterised in that described binding agent is one or more combination in carboxymethyl cellulose, polyacrylic acid, ammonium humate or sodium humate.
9. the preparation method of a kind of seed corroding forest land direct seeding forestation according to claim 1, it is characterised in that: it comprises the following steps:
S1. get the raw materials ready: weigh each raw material by above-mentioned formula proportion, standby;
S2. coatings in being formed: after charcoal, clay mineral, nutrient water-retention material and binding agent mix homogeneously, add the water that weight is mixture weight 25��35%, stir and form the interior coatings mixture of seed, seed and interior coatings mixture are put into seed pelleting machine carries out coating;
S3. once dry: the seed forming interior coatings is dried the water content < 15% to interior coatings naturally;
S4. form exterior coating: by ammonia, starch and iron sesquioxide mixing and stirring, form the exterior coating solution of seed, the seed once dried is put into dipping 2��5min in exterior coating solution;
S5. dry for two times: the seed forming exterior coating in step S4 is dried naturally to water content < 10%, namely prepare the seed corroding forest land direct seeding forestation.
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| CN109699356A (en) * | 2018-12-28 | 2019-05-03 | 河北省林业科学研究院 | Oak class seed sowing protective device |
| CN113383623A (en) * | 2021-06-15 | 2021-09-14 | 北京晴朋伟业科技发展有限公司 | Application method of soil conditioner |
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| CN109699356A (en) * | 2018-12-28 | 2019-05-03 | 河北省林业科学研究院 | Oak class seed sowing protective device |
| CN113383623A (en) * | 2021-06-15 | 2021-09-14 | 北京晴朋伟业科技发展有限公司 | Application method of soil conditioner |
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