CN110710357A

CN110710357A - Production and processing technology of composite pelleted grass seeds and application thereof

Info

Publication number: CN110710357A
Application number: CN201911141359.XA
Authority: CN
Inventors: 武俊喜; 吴萍; 宋顺华; 王德欣; 余成群; 张海军
Original assignee: Institute of Geographic Sciences and Natural Resources of CAS; Beijing Academy of Agriculture and Forestry Sciences
Current assignee: Institute of Geographic Sciences and Natural Resources of CAS; Beijing Academy of Agriculture and Forestry Sciences
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-01-21
Anticipated expiration: 2039-11-20
Also published as: CN110710357B

Abstract

The invention belongs to the technical field of agriculture, and particularly relates to a production and processing technology of composite pelleted grass seeds and application thereof. The invention takes four grass seeds of Qinghai Chinese fescue, Qinghai cold-land bluegrass, elymus praecox and flat-stem bluegrass as materials, and aims to establish a processing technology for producing composite pelletized grass seeds which can control the size and weight of seed particles and control different seed proportions through tests such as seed selection, single seed pelleting, composite pelleting of two kinds of seeds and the like, and is expected to be produced and applied in large scale. The invention processes to obtain the composite pill grains of the seeds of the Chinese fescue and the seeds of the bluegrass in the cold area, and simultaneously processes to obtain the composite pill grains of the elymus foenum-graecum and the seeds of the bluegrass, so that the two composite pill grains are as close as possible in the aspects of size, weight and the like. Therefore, in practical application, the grassland reseeding method can be used for reseeding the grassland after mixing the two composite seed pellets according to a certain proportion, so that the mixed seeding proportion of 4 kinds of seeds is ensured.

Description

Production and processing technology of composite pelleted grass seeds and application thereof

Technical Field

The invention belongs to the technical field of agriculture, and particularly relates to a production and processing technology of composite pelleted grass seeds and application thereof.

Background

Grass deterioration is a serious, global problem, and restoration and reconstruction of deteriorated grass has become one of the hot spots of attention and research of domestic and foreign scholars. Due to the bad weather conditions and the long-term unreasonable utilization, the alpine grassy land of the Qinghai-Tibet plateau of China is seriously degenerated. The occurrence of deterioration is further exacerbated by the flooding of rats, insects and toxic weeds that are derived from the deterioration of grasslands. Most of the vegetation of the deteriorated grassland is sparse, toxic and miscellaneous grasses are taken as the main plants, and the restriction of natural environment conditions is added, so that the natural recovery difficulty is high, the effect is slow, and the period is long. Therefore, it is necessary to suppress grass deterioration by manual intervention. The reseeding is one of the more common manual intervention measures with better effect.

The reseeding is to sow some pasture with strong adaptability and high feeding value on the grassland under the condition of not destroying or slightly destroying the original vegetation so as to increase the variety components of the grassland community, increase the ground coverage and improve the yield and quality of the pasture, which is an important semi-artificial and near-natural recovery measure for the treatment and improvement of the grassland and is also an effective measure for the recovery and improvement of the vegetation.

Research results show that the reseeding can increase the vegetation species components of grass layers, increase the grassland coverage, improve the grass group quality, improve the grass yield of grasslands, increase the proportion of high-quality pasture and reduce toxic and harmful plants. The research result of the hemerocallis fulva shows that the species number is increased by 8.08% by additionally sowing the bluegrass on the alpine sandy grassland of the Maqu, the density is increased by 39.65% by mixedly sowing the Festuca sinensis and the Elymus nutans, the aboveground biomass is increased by 55.74% after 3 kinds of grass are mixedly sowed, and the grass accounts for more than 50% of the total aboveground biomass.

Reseeding is an effective measure for recovering alpine sandy grasslands, but implementing reseeding also faces certain technical problems: in the deteriorated grassland, the soil is barren and has less water content, and the seeds are easy to drift with wind after being sowed or influence the germination and growth of the reseeding grass seeds due to the reasons of animal feeding, livestock trampling and the like; the awns of the artificially cultivated small-grain pasture seeds are easy to damage, and the seeds are difficult to enter the soil and fix for germination and growth; the grass seeds have obvious size difference, and proper mixed sowing proportion is not suitable to be maintained during mixed sowing, and mechanical sowing is not suitable.

The pelleting coating is an advanced seed treatment technology, improves the seed sowing performance by changing the weight and the shape of the seeds, and simultaneously leads the seeds to be used as carriers to carry nutrient substances and protective substances, thereby being beneficial to the growth in the seedling stage. The technology is applied in large scale and commercialization abroad. China has already begun to have commercial application on some high-value vegetables and horticultural seeds. The grass seed pelleting technology is not researched a lot in China, alpine meadow soil, decomposed sheep manure and the like are mainly used as fillers, and the problem that the processed grass seeds cannot be blown by wind and fix the soil can be partially solved. The seed after the pill has the defects of reduced germination rate and increased bacteria carrying rate, and the processing mode of the pill can not realize standardized and standardized production at present. In addition, different seeds, whether pellets or not, may have significant differences in weight and size, and uniform sowing is not easily achieved in the case of machine sowing or no-tillage sowing, and the proportion of the mixed sowing of seeds among different species is also not easily maintained at the same level.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a production and processing technology of composite pelleted grass seeds and application thereof.

The invention is realized in this way, a production and processing technology of composite pelleted grass seeds, comprising the following steps:

s1: respectively selecting different seeds, removing impurities and slightly shrunken seeds;

s2: respectively detecting the germination characteristics of different seeds, and judging whether to take measures to adjust the germination synchronism of the seeds for pelleting according to the detection result;

s3: pelleting the seed shells of a single type by adopting different pelleting materials, and determining the optimal pelleting material and the shell multiple;

s4: and (4) forming the pelletized composite seeds, preparing different seeds with corresponding mass according to the germination characteristics of the different seeds, and performing composite pelletization on the two seeds by using the pelletized material selected in the step S3.

Further, the different seeds are the seeds of Festuca sinensis and Poa annua L.

Further, in step S4, the mass ratio of the festuca arundinacea to the seeds of the bluegrass is 2: 1, and the weight of the Chinese fescue is increased by 8 times by taking the Chinese fescue as a main body.

Further, when the canning pelletization is performed in step S4, seeds of festuca arundinacea are first pelletized, water and a binder solution are added to the seeds, a part of the pelletized powder is added, when the weight of the pelletized powder reaches 2/3 of the weight to be added, the seeds of bluegrass are added in 3 times, and then the rest materials are all added for pelletization.

Further, the different seeds are elymus and Poa pratensis seeds.

Further, in step S4, the mass ratio of the elymus dahuricus to the poa platyphylla seeds is 40: 3.

further, when the encrusting and pelleting are performed in step S4, the elymus dahuricus seeds are firstly pelleted, water and a binder solution are added to the seeds, all the pelleted powder B powder is added, then the poa annua seeds are added, and all the remaining materials are added for pelleting.

The application of the composite pelletized grass seeds prepared by the production and processing technology of the composite pelletized grass seeds in grassland sowing.

In summary, the advantages and positive effects of the invention are:

the invention takes four grass seeds of Qinghai Chinese fescue, Qinghai cold-land bluegrass, elymus praecox and flat-stem bluegrass as materials, and aims to establish a processing technology for producing composite pelletized grass seeds which can control the size and weight of seed particles and control different seed proportions through tests such as seed selection, single seed pelleting, composite pelleting of two kinds of seeds and the like, and is expected to be produced and applied in large scale. At present, no research report on the industrial processing technology of the related composite seeds is found at home and abroad.

The method removes impurities in the seed batches by methods such as gravity separation and the like, and is a common method in the seed processing process. The invention improves the germination rate and thousand seed weight of the selected seeds because a part of the light and shriveled seeds are removed in the selection process. The cold-field early-maturing grass and the flat-stem early-maturing grass are very small seeds, and the original thousand seed weights are 0.192g and 0.187g respectively. The original purity of the seeds is not high, and is respectively 94.4 percent and 94.5 percent. Through the selection, the three measured quality indexes are obviously improved.

For the production of pelleted composite seeds, the seed selection is not only for improving the indexes such as cleanliness and germination rate, but also for accurately and quantitatively adding the test seeds, ensuring the seed proportion in the composite seeds and simultaneously reducing the adverse effect of impurities in the seeds on the formation of the pelleted seeds as much as possible.

The small seeds are added at different stages of the composite seed processing, and the proportion of the two seeds is obviously influenced. Taking the composite seeds of the Chinese fescue and the cold-land bluegrass as an example, in 4 treatments, the proportion of the two seeds can be ensured to be close to the design requirement only by adding small seeds at the later stage but not at the last stage. Probably because the earliest added small seeds did not adhere effectively to the seeds of Festuca arundinacea. The seeds added in the early stage can be adhered to the seeds of the Chinese fescue, but the pill materials covered on the surfaces of the seeds finally influence the germination. And finally, the small seeds are added for treatment, and because the small seeds are basically adhered to the surface of the seed body, the periphery is slightly covered, and no protective layer is arranged, the small seeds discovered by detection are not too many.

The invention aims to process and obtain composite pill particles of Chinese fescue seeds and cold bluegrass seeds, and simultaneously process and obtain composite pill particles of elymus chinensis and flat-stem bluegrass seeds, so that the two composite pill particles are as close as possible in the aspects of size, weight and the like. Therefore, in practical application, the grassland reseeding method can be used for reseeding the grassland after mixing the two composite seed pellets according to a certain proportion, so that the mixed seeding proportion of 4 kinds of seeds is ensured. By applying the method, a plurality of seeds with different sizes can be respectively cladded to form composite seed particles, and then different composite seed particles are mixed according to the mixed sowing requirement, so that the seed proportion meets the design requirement.

Drawings

FIG. 1 is a comparison of germination of four seeds;

FIG. 2 is a graph of the effect of beneficiation on the germination of Festuca arundinacea seeds;

FIG. 3 is a graph of the effect of different cladding folds on the germination of Festuca arundinacea seeds;

FIG. 4 shows the germination of the seeds of Festuca arundinacea and Poa annua composite pellets for 14 days;

FIG. 5 shows the emergence of seedlings of composite pellets of Festuca sinensis and Poa annua in cold field, and the seeds of naked seeds and pellets.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. The apparatus and reagents used in the examples and test examples of the present invention are commercially available unless otherwise specified.

Examples

The invention discloses a production and processing technology of composite pelleted grass seeds and application thereof, wherein four seeds are tested in the invention, and the four seeds are respectively: blue grass of the young Mey Clinophia (Poa crymophila Keng), Chinese fescue (Festucasinensis Keng), Elymus dahuricus (Turcz), and Poa platyphylla Keng, all from Tianxing Hay Utility company, in Tibet. 4 pelleted materials, labeled A1, B, R, W, respectively, were selected for use in the present invention. Wherein: a1 is given by Astec seeds technologies, Netherlands, and the material is fully called Astec A1; b and R are imported materials from Germany, the trade names of the imported materials are Berlerleph (Bellerophpn) and Rolix (Rolexo), W is a material which is made by Jingyan Yinong (Beijing) Seiko science and technology Limited and is called JYYN-W, and the company is specially used for coating vegetable seeds. The specific pelleting method is as follows:

s1: seed refinement

Selecting proper air quantity according to the specific gravity and original purity of the seeds by using a seed winnowing machine (Kiya Seisakusho, Japan), and screening to remove impurities accounting for 5-10% of the total weight and light shrunken seeds.

S2: seed germination detection

The germination of the four seeds was examined according to the international seed test protocol (2017). All tests adopt germination on paper, and the germination is repeated for 4 times when 100 seeds are treated, and the temperature change condition of 20-30 ℃ is adopted. The statistical time of germination vigor/germination rate was: 7d/14d of Chinese fescue seeds, 7d/21d of cold bluegrass seeds, 5d/14d of elymus littoralis seeds and 10d/21d of physalis platyphylla seeds.

Effect of concentration on seed quality:

the four grass seeds are selected by adopting a gravity concentration method, the selected seeds are improved in the aspects of purity, thousand seed weight and germination rate, and the four grass seeds are effective, and are shown in table 1. The selection has more obvious influence on the quality indexes of the seeds of the cold early-maturing bluegrass and the flat-stem early-maturing bluegrass.

TABLE 1 Effect of beneficiation on clarity, thousand Kernel weight and Germination Rate of four grass seeds

Determination of germination characteristics of four grass species:

the germination process of four seeds was examined, wherein the effect of selection on the germination of Festuca arundinacea seeds is shown in FIG. 2. The seeds of Festuca sinensis and Elymus dahurica begin to germinate 3 days after being placed in the bed, while the seeds of two Poa annua begin to germinate 4 days later. The germination rate of the 4 seeds reaches more than 80 percent of the final germination rate after being placed in a bed for 5 days. As shown in fig. 1, it can be seen that the four seeds are relatively similar in the earliest germination time and the main concentrated germination time period, and there is no need to adjust the synchronicity of germination of different kinds of seeds by other methods. If the germination time of different seeds is greatly different, the seeds which germinate first can cause the complete cracking of the seed pill balls, and the ungerminated seeds can absorb insufficient water to influence the germination. Although this possibility is not very great, it should be taken into account and adjusted. In actual production, the seeds with slower germination can be subjected to priming treatment, so that the germination speed and the uniformity of the seeds can be improved, and the synchronization with the germination of other seeds can be adjusted.

S3: seed encrusting pelletization

The cladding pelleting method comprises the following steps: according to the design of the test, 200-500 g of test seeds are added into a special pelleting pot in the field and kept in a rotating state, a proper amount of water or a binder solution with a certain concentration is sprayed firstly, a proper amount of pelleting powder is added, the operations of adding liquid and adding powder are repeated for multiple times until all materials which are designed to be added are added, a certain amount of water or solution is added on the surface, finally a layer of coating agent with a special color is added, and the materials are taken out and dried after being uniformly mixed. The dried seed particles are sieved to remove impurities.

The influence of pelleting and encrusting with different materials on the germination of the seeds of the Festuca arundinacea:

the method is characterized in that the weight gain of 5 times is taken as a design target, different materials are adopted to carry out cladding pelleting treatment on the Festuca arundinacea seeds, and the influence of the cladding treatment on the germination characteristics of the seeds is measured. When manually operated, the control is performed by observing the physical properties of the seed surface, such as color, gloss, smoothness, etc. For example, when water is added in the pelleting process, water is added in the form of atomized micro water drops until the surface is sufficiently wet, no excess water can exist, otherwise, the seeds can be adhered to form double granules, or when the pelleting material is added, the material forms empty balls without seed cores when meeting water. The same applies to the process of adding the pellet material, and the addition amount is proper, if the addition amount is too much, the material added at the later stage can not cover the surface of the seed, and the material can be mixed in the seed in a powder form, and empty seed balls can be formed when the water is added at the next time.

Statistics shows that the experiment of generally increasing the weight by 5 times needs 30 to 40 times of repeated water-powder adding operation cycles. The number of cycles may vary from seed to seed and from operator to operator. Meanwhile, the operation of each cycle is controlled within a certain range. For example, different operators determine that the standard of the proper amount of water addition may be different, and when the amount of water added is slightly less, the amount of powder added in the next step is also less, so that the total circulation times are more.

The weight gain is 5 times, which means that the weight of the pelleted seed (generally expressed in thousand kernel weight) after drying is 5 times of that of the original seed. In the actual practice in our laboratory, the sum of the weights of the added materials is generally 5.22 to 5.50 times that of the seeds (excluding water and coating agents, the amount of material to be used for the different seeds is to be determined by preliminary tests). The test procedure produces hollow seed spheres with or without a core of impurities, which should be removed as much as possible after complete drying. This portion of empty seed balls may occupy some of the pellet material, affecting the thousand seed weight of the pellet seed. Therefore, the seeds are first selected. Taking the example of 5 times the weight gain of B powder, when the seed is 1, the total amount of B powder is 5, the total moisture is about 4.8-5.3, the brightener is 0.22, and the coating agent is 0.30-0.38 (relative to the pellet seed shape and surface area).

The results of the influence of the partial cladding times on the germination of the seeds of the Chinese fescue are shown in figure 3, and the weight is respectively increased by 4 times, 6 times and 8 times from top to bottom. The results are shown in table 2 and show that different pelleted materials have a very significant effect on the shelled seeds. The effect of the B powder coating on germination was smaller compared to the bare seeds, followed by W powder. The most serious effect was the R-dust, the germination potential/germination rate was only 24%/61% of naked seeds, respectively.

TABLE 2 Effect of different Material pelletization on Germination characteristics of Festuca arundinacea seeds

The letters in the table are different after the same column of data, indicating that the difference is significant (P < 0.05)

Effect of different weight gain on seed germination:

the influence of the pelleting treatment of the B powder with different weight gains on the germination of the seeds of the Festuca arundinacea is determined. The test results are shown in Table 3, and the results show that the early-stage germination speed of the pellet seeds has certain influence in the range of 4-8 times, but the influence on the germination vigor of the seeds is obviously reduced, and the germination rate of the seeds is basically not influenced.

TABLE 3 Effect of different weight gains on Germination of Festuca sinensis seeds

Effect of different weight gains on germination of poa annua seeds:

the seeds of the Poa annua in the cold area were pelleted with the powder B at a weight of 5, 10, 15, and 20 times, and the germination characteristics of the pelleted seeds and the original seeds were measured. The results are shown in Table 4, and show that when the weight is increased by 5 times, the germination speed of the seeds is reduced, the germination potential is reduced, but the germination rate of the seeds is not influenced. The effect of the pelleting treatment on germination becomes more and more obvious with the increase of the weight gain, and when the weight gain reaches 15, basically no seeds germinate.

TABLE 4 Effect of different weight gains on germination of Poa pratensis pellets

S4: formation of pelletized composite seeds

1. Composite seed processing of Chinese fescue and cold-land bluegrass

In the case that the test result confirms that the 8 times of encapsidation of the seeds of the Chinese fescue does not influence the germination basically, the seeds are encapsidated 8 times by taking the seeds as the main body. The seeds of the bluegrass are respectively added in different stages of the cladding, and the formation of the composite seeds and the influence of different processing methods on the germination of the two seeds and the germination proportion between the seeds are observed. The proportion of the seeds of the Chinese fescue/the cold-land bluegrass is designed to be 1: 1. and determining the proportion of the added seeds according to the measurement results of the seed cleanliness, the thousand seed weight and the germination rate and considering that part of the cold early-maturing grass seeds are not adhered. 150g of Chinese fescue seeds are taken, and 75 g of seeds of the bluegrass are added. 1200 g of B powder is added, and 35g of coating agent is added. Processing according to the method of S3.

Table 5 shows the results of germination testing of the pellet seeds obtained in several processing modes. Wherein the seed 1 is a Chinese fescue seed, and the seed 2 is a cold-land Poa annua seed. Treatment 1 is to add seeds 2 at the beginning of the process, i.e. both seeds are added simultaneously and the process starts together; treatment 2 is to process the seeds 1 first, when the weight of the added pelleted powder reaches 1/3 of the added weight, add the seeds 2 in 3 times; treatment 3 is to add the seeds 2 in 3 times when the weight of the added pelleting powder reaches 2/3 of the weight corresponding to the weight; treatment 4 is the addition of seeds 4 at the final stage of the processing of the seeds 1, i.e. the distribution of the seeds 2 on the surface of the seeds 1 after the pellets. After coloring and drying the seeds, screening the seeds, and selecting the seeds with the size close to 8 times that of the pure Festuca arundinacea seeds for a germination test.

The results of the germination test are shown in table 5, and the results show that the germination rate of the Festuca arundinacea seeds in the processed composite seeds is reduced compared with the seeds which are simply increased by 8 times. The split seed particles were found to be partially free of the seeds of Festuca sinensis. I.e., the pelletization process forms partially empty pellets or contains only the seeds of Poa annua. Secondly, the addition time of the cold-land poa annua seeds has a great influence on the seed proportion in the composite seeds. The proportion of cold bluegrass seeds was too small both in the early addition and in the final addition to the resulting seed particles. The approach to the design scale is treatment 3. The two seed ratios were about 1: 1.1. it was also found that in the seeds processed according to

treatments

1 and 4, a large number of small particles were present and the germination was indicated as cold bluegrass, i.e. part of the seeds 2 did not form well composite seeds with the seeds 1 under these conditions, but formed small seed balls by themselves.

TABLE 5 Effect of Small seed addition time on Compound seed formation and Germination

In the table, the seed 1 is the Chinese fescue, and the seed 2 is the cold-land annual bluegrass; the same row of data carries different letters, indicating that the difference is significant (P < 0.05) and that the seeds of the composite pellets of Festuca sinensis and Poa annua germinate for 14 days as shown in FIG. 4. The emergence of seedlings of composite pellets of Festuca sinensis and Poa annua in cold field, and the bare seeds and the pellet seeds are shown in FIG. 5.

2. Processing of composite seeds of Elymus ampelina and Poa peregrina

Designing the proportion of the elymus repens/the poa platyphylla seeds as 1: 1. according to the results of the measurement of the seed cleanliness, thousand seed weight and germination percentage, 200 g of elymus cappus seeds and 15 g of poa platyphylla seeds are taken, 200 g of B powder is firstly added, 200 g of R powder is added after the completion, and 50g of coating agent is finally added. Processing according to the method of S3.

Similar results were obtained in the processing experiments of elymus and poa platyphylla composite seeds. Considering that the size of the Elymus serpyllum seeds is large and the thousand seeds weigh about 5g, the Elymus serpyllum seeds are not suitable to be processed into too large seeds. The invention adopts B powder to increase the weight by 1 time, and then R powder to increase the weight by 1 time. The R powder cladding has essentially no effect on the volume of the seed but increases pellet particle weight and strength. The results of germination measurements are shown in table 6, which shows that seeds 4, which are Poa perennia when half of the B powder is added, contain fewer seeds 4, and the results are as in treatment 1; treatment 2 is to add seeds 4 after adding all the powder B, which can form a complex with the elymus sativus seeds 3, and the final ratio of germinated seeds is about 1: 0.85. also, there is the problem of empty granules, i.e. part of the pelletised material or impurities form granules, without seeds.

TABLE 6 influence of different processing techniques on the seed ratio in the composite seed

In the table, the seeds 3 are elymus pratense, and the seeds 2 are annual bluegrass; the letters in the same column of data are different, indicating that the difference is significant (P < 0.05)

And (4) conclusion: the method for removing impurities in the seed batch by gravity separation and the like is a common method in the seed processing process. The invention improves the germination rate and thousand seed weight of the selected seeds because a part of the light and shriveled seeds are removed in the selection process. The cold-field early-maturing grass and the flat-stem early-maturing grass are very small seeds, and the original thousand seed weights are 0.192g and 0.187g respectively. The original purity of the seeds is not high, and is respectively 94.4 percent and 94.5 percent. Through the selection, the three measured quality indexes are obviously improved.

Different cladding of the pellet material will have different effects on the germination characteristics of the seed. The results of this test show that both materials B and W have essentially no effect on the germination of pelleted seeds with 5 times weight gain. However, in the research of the composite seed processing technology, the B + R cladding is still adopted for the elymus and the annual bluegrass seeds. This is because the coating of the R powder can increase the particle strength of the pellet seed without significantly increasing the volume. The elymus dahuricus seed has larger volume, so the germination result also proves that the cladding has little influence on the germination of the seed by only adopting the treatment that the weight of B and R is increased by 1 time respectively.

In the range of the weight gain of the Festuca arundinacea seeds of 4-8 times, the pelleting treatment of the powder B has little influence on the germination potential of the seeds and basically has no influence on the germination rate of the seeds. The early germination results are lower than the control, and may be that the water absorption speed of the seeds is reduced, or the radicle of the seeds is not easy to be discovered in early stage due to the existence of the pelleting material after extending. It can be said that the pelletization treatment within a certain range does not affect the germination of the seeds of Festuca arundinacea.

The grains of the cold-land bluegrass seeds are very small, and the thousand seed weight is only 0.224 g. A greater weight gain may be required if a pelletisation treatment is to be performed. Test results show that when the weight gain times reach 15, the seeds can not normally germinate basically. Therefore, when the compound seeds are produced in the later period, the seeds are added to the position close to the surface of the pill seeds, so that the obstruction of the pill materials to the seed germination is reduced.

Compared with the mixed sowing of four seeds after respectively pelleting, the biomass and the species number of the reseeding grassland have no obvious difference, but the uniformity of the reseeding grassland after the sowing is improved by 76 percent compared with the uniformity of the reseeding grassland after the sowing; the germination rate of the seeds after pelleting by the technology of the application has no obvious difference compared with the seeds after pelleting by the common pelleting technology.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The production and processing technology of the composite pelleted grass seeds is characterized by comprising the following steps:

2. The process for producing and processing a composite pelletised grass seed as claimed in claim 1, wherein: the different seeds are respectively the seeds of the Chinese fescue and the seeds of the bluegrass.

3. The process for producing and processing a composite pelletised grass seed as claimed in claim 2, wherein: in step S4, the mass ratio of the festuca arundinacea to the seeds of the bluegrass is 2: 1, and the weight of the Chinese fescue is increased by 8 times by taking the Chinese fescue as a main body.

4. The process for producing and processing a composite pelletised grass seed as claimed in claim 3, wherein: when the canning pelleting is carried out in the step S4, seeds of the festuca arundinacea are firstly pelleted, water and a binder solution are added into the seeds, part of the pelleted powder is added, when the weight of the pelleted powder reaches 2/3 of the weight to be added, the seeds of the bluegrass are added into the seeds for 3 times, and then the rest materials are all added for pelleting.

5. The process for producing and processing a composite pelletised grass seed as claimed in claim 1, wherein: the different seeds are Elymus evansi and Poa annua seeds respectively.

6. The process for producing and processing a composite pelletised grass seed as claimed in claim 5, wherein: in step S4, the mass ratio of the elymus dahuricus to the poa platyphylla seeds is 40: 3.

7. the process for producing and processing a composite pelletised grass seed as claimed in claim 6, wherein: when the canning pelleting is performed in the step S4, the elymus dahuricus seeds are firstly pelleted, water and a binder solution are added into the seeds, all the pelleting powder B powder is added, then the poa annua seeds are added, and all the rest materials are added for pelleting.

8. Use of a composite pelletised grass seed produced by the process for producing a composite pelletised grass seed as claimed in any one of claims 1 to 7 in grass seed sowing.