CN111387357A - Preparation method of corn and soybean mixed silage, prepared feed and application - Google Patents
Preparation method of corn and soybean mixed silage, prepared feed and application Download PDFInfo
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Abstract
The invention relates to a preparation method of a corn and soybean mixed silage, a prepared feed and application, and belongs to the technical field of feed preparation. The preparation method comprises the following steps: taking every 2 rows of corns as one belt, and interplanting one belt of soybeans between every two belts of corns, wherein the planting rows of the soybeans in each belt are 2-4 rows; and harvesting the corn and the soybean at the same time, and performing wrapping and ensiling. According to the method, corn and soybean strips are harvested and modulated together after intercropping, so that the nutrient content and fermentation quality of the obtained feed are improved, the weight of beef cattle and mutton sheep are increased obviously, and the economic benefit is obvious.
Description
Technical Field
The invention relates to the technical field of feed preparation, in particular to a preparation method of a corn and soybean mixed silage, a prepared feed and application.
Background
With the development of animal husbandry, the requirements for high-quality roughage, silage accounts for a large proportion of roughage. The nutritional quality and fermentation quality of silage are generally influenced by silage materials, the corn has high non-structural carbohydrate content, fermentation substrates are provided for lactic acid bacteria, pH is rapidly reduced, and therefore silage is easy, the lignin content is high, palatability is good, and digestion and absorption are easy, so that the silage is often used for preparing silage, but the protein content is low, and the requirement for preparing high-quality silage cannot be met by simply using the corn for preparing the silage. The soybean is both protein crop and oil crop, the soybean protein is 'complete protein', the digestibility is higher than that of corn, and the straw is good coarse fodder for cattle and sheep. However, ensiling alone is difficult to succeed because of its low carbohydrate content and high buffering capacity, which prevents a rapid drop in seed pH during ensiling. Most of the existing corn and soybean intercropping production modes focus on grain seed production, and the existing reported scheme for preparing silage after intercropping only focuses on protein content and ignores fermentation quality and other nutritional ingredients. The organic acid content (including butyric acid) of the mixed silage reported in the prior art is higher than that of the corn silage alone, particularly, the butyric acid content is more than 1%, and the ammoniacal nitrogen/total nitrogen is more than 10%, and the two indexes exceed the safety limit, which indicates that a lot of proteins in the mixed silage are aminated, are unusable proteins, are seriously degraded and belong to rotten feeds; moreover, the content of Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) after mixed silage reported in the prior art is higher than that of single-purpose corn silage, which shows that the digestibility is reduced after mixed silage. Therefore, at present, no preparation scheme for the corn and soybean mixed silage with high quality and high economic benefit exists.
Disclosure of Invention
The invention aims to provide a preparation method of corn and soybean mixed silage, the prepared silage and application. According to the method, corn and soybean strips are harvested and modulated together after intercropping, so that the nutrient content and fermentation quality of the obtained feed are improved, the weight of beef cattle and mutton sheep are increased obviously, and the economic benefit is obvious.
The invention provides a preparation method of a corn and soybean mixed silage, which comprises the following steps:
taking every 2 rows of corns as one belt, and interplanting one belt of soybeans between every two belts of corns, wherein the planting rows of the soybeans in each belt are 2-4 rows;
and harvesting the corn and the soybean at the same time, and performing wrapping and ensiling.
Preferably, the total width of one belt of corn and one belt of soybean is 190-230 cm.
Preferably, the row spacing of the corns in each corn belt is 40cm, the row spacing of the soybeans in each corn belt is 30cm, and the distance between the adjacent corn belts and the adjacent soybean belts is 50-60 cm.
Preferably, the planting density of the corn is 4000-5000 plants/mu.
Preferably, the planting density of the soybeans is 8000-12000 plants/mu.
Preferably, the harvesting time is when the corn is in the 2/3 milk line stage.
Preferably, the harvesting means comprises mechanical harvesting.
Preferably, the soybeans do not apply nitrogen fertilizer.
The invention also provides the corn and soybean mixed silage prepared by the preparation method of the technical scheme.
The invention also provides application of the corn and soybean mixed silage in the technical scheme in improving the weight of livestock.
The invention provides a preparation method of a corn and soybean mixed silage. The preparation method provided by the invention has the advantages that the high stalk crop corn and the short stalk crop soybean are reasonably configured in the field, and are harvested and stored simultaneously, so that the yield in the field can be improved, the quality of silage can be improved, the output of animal products can be improved, and the labor cost can be reduced. The test result shows that the preparation method is convenient to operate and can realize mechanization, the protein content of the obtained silage is obviously improved compared with that of corn single silage, the neutral washable fiber and the acid washable fiber of the silage obtained by the preparation method are low, the lactic acid content is high, the pH value of mixed silage is below 4.2, and no butyric acid or NH is detected3the/TN is lower than 10%, when the density of the corn is 4000-4500 plants/mu, the NDF and ADF content after mixed ensiling is lower than that of the corn and soybean single storage, when the density of the corn is 5000 plants/mu, the NDF and ADF content after mixed ensiling is lower than that of the soybean single storage, and the NDF and ADF content is not obviously different from that of the corn single storage, so that the feed digestibility can be improved after mixed storage, and is at least equal to that of the corn.
Drawings
FIG. 1 is a schematic view of a planting pattern of group A1B1C1 in example 1 of the present invention;
FIG. 2 is a schematic view of the planting pattern of group A2B2C2 in example 2 of the present invention;
fig. 3 is a pattern diagram of planting in group A3B3C3 in example 3 of the present invention.
Detailed Description
The invention provides a preparation method of a corn and soybean mixed silage, which comprises the following steps:
taking every 2 rows of corns as one belt, and interplanting one belt of soybeans between every two belts of corns, wherein the planting rows of the soybeans in each belt are 2-4 rows;
and harvesting the corn and the soybean at the same time, and performing wrapping and ensiling. The manner of wrapping the silage in the present invention is not particularly limited, and a conventional method of wrapping the silage, which is well known to those skilled in the art, may be used. The specific corn and soybean strip intercropping mode of the invention can combine the advantages, supplement nutrients mutually, enhance the photosynthesis, water and fertilizer retention capacity, improve the land utilization rate, create conditions for high yield of crops, and is beneficial to improving the resource utilization rate and the crop production level. The jade-bean mixed silage can efficiently utilize a jade-bean intercropping mode, and utilize a planting technology to obtain high-yield and high-quality silage raw materials, so that the land and the cost are saved, and the yield and the quality of forage grass are improved.
The soybean belongs to high-protein feed, and is not easy to succeed in single silage, the invention realizes the successful silage of the soybean, and compared with the corn single silage, the invention obviously improves the protein content, especially the crude protein content, and can be improved by 1.13-2.92 percent. The invention can realize the successful mixing and ensiling of the main gramineous crop corn and the main leguminous crop soybean through row ratio preparation (namely the corn: the soybean is 2 (2-4)), and can realize mechanization. The quality of fermentation directly reflects whether the silage is successfully fermented, and the lactic acid content in the corn and soybean mixed silage reaches 6-11 percent and is far higher than that of single silage of soybeans by 1.49 percent; the pH value of the mixed silage is below 4.2, and the pH value of the single silage of soybeans is 5.73; no butyric acid was detected and NH was detected in the mixed silage3the/TN is lower than 6 percent, the content of butyric acid in the soybean single storage is higher than 1 percent of safety standard, and NH3the/TN is far greater than 10% of the safety standard, which indicates that the high-protein soybean in the mixed silage can be well preserved.
In the present invention, the total width of one belt of corn and one belt of soybean is preferably 190 to 230cm, more preferably 210 cm. In the invention, the row spacing of the corns in each belt of corns is preferably 40cm, the row spacing of the soybeans in each belt of soybeans is preferably 30cm, and the distance between the adjacent corn belts and the adjacent soybean belts is preferably 50-60 cm, and more preferably 55 cm.
In the invention, the planting density of the corn is preferably 4000-5000 plants/mu, and is more preferably 4500 plants. In the invention, the planting density of the soybeans is preferably 8000-12000 plants/mu, and more preferably 10000 plants.
In the present invention, the time of harvesting is when the corn is in the 2/3 milk line stage. In the present invention, the harvesting means comprises mechanical harvesting.
In the invention, the number of days for ensiling is 45-90 d, and more preferably 60 d.
In the present invention, the soybean is preferably not applied with nitrogen fertilizer. Specifically, the fertilization of the corn is preferably carried out according to local production habits, the fertilization of the soybean is preferably not carried out with nitrogen fertilizer, and the phosphorus-potassium fertilizer is consistent with the local production level.
The invention also provides the corn and soybean mixed silage prepared by the preparation method of the technical scheme.
The invention also provides application of the corn and soybean mixed silage in the technical scheme in improving the weight of livestock. The silage prepared by the preparation method disclosed by the invention has the neutral detergent fiber of 28.37-36.15%, the content of the acid detergent fiber (which cannot be absorbed and utilized by animals) of 14.67-19.59%, the feed intake and the digestibility of the animals are directly influenced by the content of the fiber, and the silage disclosed by the invention has the advantage that the weight gain is obvious after the silage is fed to the livestock.
The following will describe the preparation method of the corn and soybean mixed silage, the prepared silage and the application in detail with reference to specific examples, and the technical scheme of the invention includes but is not limited to the following examples.
Example 1
Corn is planted according to the row ratio of 2:2(A1: bandwidth 1.9m), 2:3(A2: bandwidth 2.1m) and 2:4(A3: bandwidth 2.3m) at 4000 strains/mu (B1), soybean density is 8000(C1), 10000(C2) and 12000(C3) (the field configuration is shown in a table 1-1), when the corn is in a 2/3 dairy season, the corn and the soybean are harvested simultaneously by adopting a field integrated harvesting chopper, wrapped and ensiled, and the nutritional quality of the ensiled feed is measured after 60 days; at the same time, some corn and soybean were harvested separately for wrapping and ensiling as a control. The fertilization of corn rows is carried out according to the local production habit, the nitrogen fertilizer is not applied to soybean rows, and the phosphorus-potassium fertilizer is consistent with the local production level.
TABLE 1-1 field planting Pattern when corn Density is 4000 plants/acre
And (4) analyzing results:
as can be seen from tables 1-2, the Crude Protein (CP) content, Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) of soy are significantly higher than corn, while the soluble carbohydrate (WSC) content is significantly lower than corn and < 5%, ensiling alone is not easily successful.
TABLE 1-2 characteristics of mixed raw materials for mixed storage of semen Phaseoli vulgaris
Fermentation quality: the fermentation quality of the silage directly reflects the success of the silage, and is more important than the nutrient content. For conventional ensiling, there are 3 very important indexes for judging the success of ensiling, namely pH is less than 4.2, ammoniacal nitrogen/total nitrogen is less than 10%, and butyric acid content is less than 1%. As can be seen from tables 1-3, the pH, ammoniacal nitrogen/total nitrogen and butyric acid contents of the soybean silage alone are not within the safe ranges, so that the soybean silage alone fails.
In the mixed storage treatment of the corn and the soybean, the pH, the ammoniacal nitrogen/total nitrogen, the lactic acid and the butyric acid content all reach the standard of safe ensiling fermentation, and the corn and the soybean can be safely stored.
The pH value is generally taken as an important index for evaluating the quality of silage, generally, the pH value is reduced to 4.2 to meet the requirement of successful silage, and the pH value of the silage soybeans in the test is as high as 5.73, which is far from reaching the acid environment required by the silage for safe storage and utilization. Ammoniacal nitrogen/total nitrogen is widely used to evaluate the quality of silage, which reflects the degree to which protein is decomposed during the silage process, and a larger value indicates more protein decomposition and poorer silage quality. In the test, the ammoniacal nitrogen/total nitrogen value of the ensiled soybeans is up to 42%, and the other treatments are between 4 and 5%. Successful silage should have high lactic acid and low butyric acid, which is a foul gas generated by the decomposition of glucose and lactic acid by butyric acid bacteria, causing the raw material to foul, thereby reducing silage quality. In this test, no butyric acid was detected except for soybean storage alone, and all had a higher lactic acid content, indicating that they had good fermentation quality.
TABLE 1-3 fermentation quality of soybeans and corn under mixed storage treatment at different row ratios
The nutrient components are as follows: as can be seen from tables 1-4, soybeans were significantly higher in CP, NDF, ADF content than other treatments (P <0.05) and significantly lower in WSC content than other treatments (P <0.05) when ensiled alone. The WSC content and CP content of the corn are the highest and the difference is obvious in other treatment when the corn is stored singly (P is less than 0.05). The CP content under the mixed storage treatment of each row ratio is obviously higher than that of the corn single storage (P is less than 0.05), the treatment is highest at 2:3, and then the treatment is 2: 2; the NDF and ADF contents under the mixed storage treatment of each row ratio are obviously lower than those of single storage of soybeans, the treatment is lowest at 2:3, and then the treatment is 2: 2; the WSC content under the mixed storage treatment of each row ratio is obviously higher than that of the single storage of the soybeans (P <0.05), and no obvious difference exists between the treatments with the ratio of 2:3 and 2: 2.
The nutritional value of silage is a major concern. Wherein the CP content is an important index for measuring the nutritive value of the forage. The whole silage corn is easy to silage, but has low CP content and high soybean CP content, but has low WSC content and insufficient fermentation substrate, which is not beneficial to successful silage, and the silage corn and the soybean are mixed for storing, so that the silage quality can be improved. In this trial, soybeans were ensiled alone for 60 days with the lowest WSC content, while NDF and ADF were significantly highest in all treatments. However, NDF values are inversely related to the absorption of livestock, lower NDFs indicate higher economic value, and ADF is a non-digestible fraction of cellulose in amounts that are inversely related to forage digestibility. These all indicate that soybeans are not suitable for ensiling alone.
Compared with soybean single storage, in the test, the corn has higher WSC content, so that the generation of lactic acid and the rapid reduction of pH value are promoted, the fermentation of the corn reaches an ideal state, and finally the ensiling is successful. After the corn and soybean mixed silage, the CP content of each treatment is obviously higher than that of the corn singly stored, and the NDF content and the ADF content are also reduced (except the ratio of 2:4 lines), which is more obvious under the condition of 2: 3. This shows that although corn is easy to be ensiled, the addition of soybean contributes to the increase of the crude protein content of the feed and the reduction of the fiber content, further improves the quality, and the mixed storage effect is best at the row ratio of 2:3 of the soybeans.
Tables 1-4 nutrient composition of corn and soybean with different blending storage treatments
Note: different letters in the same column indicate significant differences (P < 0.05).
Example 2
Planting the corn soybeans according to a row ratio of 2:2(A1: bandwidth 1.9m), 2:3(A2: bandwidth 2.1m) and 2:4(A3: bandwidth 2.3m) in the corn density of 4500 plants/mu (B2), the soybean density of 8000(C1), 10000(C2) and 12000(C3) (the field configuration is shown in a table 2-1), harvesting the corn soybeans simultaneously by adopting a field integrated harvesting chopper when the corn is in a 2/3 mammary line period, wrapping and ensiling the corn soybeans, and determining the nutritional quality of the silage after 60 days; at the same time, some corn and soybean were harvested separately for wrapping and ensiling as a control. The fertilization of corn rows is carried out according to the local production habit, the nitrogen fertilizer is not applied to soybean rows, and the phosphorus-potassium fertilizer is consistent with the local production level.
TABLE 2-1 field planting Pattern at a corn density of 4500 plants/acre
As can be seen from tables 2-2, the Crude Protein (CP) content, Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) of soybeans were all significantly higher than corn, while the soluble carbohydrate (WSC) content was significantly lower than corn and < 5%, ensiling alone was not easily successful.
TABLE 2-2 characteristics of mixed raw materials for mixed storage of beans
As can be seen from tables 2-3, the pH, ammoniacal nitrogen/total nitrogen and butyric acid contents of the soybean silage alone are not within the safe ranges, so that the soybean silage alone fails.
In the mixed storage treatment of the corn and the soybean, the pH, the ammoniacal nitrogen/total nitrogen, the lactic acid and the butyric acid content all reach the standard of safe ensiling fermentation, and the corn and the soybean can be safely stored.
TABLE 2-3 fermentation quality under mixed storage treatment of soybean and corn in different row ratios
Nutritional ingredients (trend consistent with example 1): as can be seen from tables 2-4, soybeans were significantly higher in CP, NDF, ADF content than other treatments (P <0.05) and significantly lower in WSC content than other treatments (P <0.05) when ensiled alone. The WSC content and CP content of the corn are the highest and the difference is obvious in other treatment when the corn is stored singly (P is less than 0.05). The CP content under the mixed storage treatment of each row ratio is obviously higher than that of the corn single storage (P is less than 0.05), the treatment is highest at 2:3, and then the treatment is 2: 2; the NDF and ADF contents under the mixed storage treatment of each row ratio are obviously lower than those of single storage of soybeans, the treatment is lowest at 2:3, and then the treatment is 2: 2; the WSC content under the mixed storage treatment of each row ratio is obviously higher than that of the single storage of the soybeans (P <0.05), and no obvious difference exists between the treatments with the ratio of 2:3 and 2: 2.
The nutritional value of silage is a major concern. Wherein the CP content is an important index for measuring the nutritive value of the forage. The whole silage corn is easy to silage, but has low CP content and high soybean CP content, but has low WSC content and insufficient fermentation substrate, which is not beneficial to successful silage, and the silage corn and the soybean are mixed for storing, so that the silage quality can be improved. In this trial, soybeans were ensiled alone for 60 days with the lowest WSC content, while NDF and ADF were significantly highest in all treatments. However, NDF values are inversely related to the absorption of livestock, lower NDFs indicate higher economic value, and ADF is a non-digestible fraction of cellulose in amounts that are inversely related to forage digestibility. These all indicate that soybeans are not suitable for ensiling alone.
Compared with soybean single storage, in the test, the corn has higher WSC content, so that the generation of lactic acid and the rapid reduction of pH value are promoted, the fermentation of the corn reaches an ideal state, and finally the ensiling is successful. After the corn and soybean mixed silage, the CP content of each treatment is obviously higher than that of the corn singly stored, and the NDF content and the ADF content are also reduced (except the ratio of 2:4 lines), which is more obvious under the condition of 2: 3. This shows that although corn is easy to be ensiled, the addition of soybean contributes to the increase of the crude protein content of the feed and the reduction of the fiber content, further improves the quality, and the mixed storage effect is best at the row ratio of 2:3 of the soybeans.
TABLE 2-4 nutrient composition of corn and soybean under different blending and storing treatment
Example 3
Planting the corn soybeans according to a row ratio of 2:2(A1: bandwidth 1.9m), 2:3(A2: bandwidth 2.1m) and 2:4(A3: bandwidth 2.3m) (the field configuration is shown in table 2, and the picture 1 is a picture corresponding to the group A2B3C 2), when the corn is in a 2/3 milk line period, simultaneously harvesting the corn soybeans by adopting a field integrated harvesting chopper, wrapping and ensiling, and determining the nutritional quality of the ensiling feed after ensiling for 60 days; at the same time, some corn and soybean were harvested separately for wrapping and ensiling as a control. The fertilization of corn rows is carried out according to the local production habit, the nitrogen fertilizer is not applied to soybean rows, and the phosphorus-potassium fertilizer is consistent with the local production level.
TABLE 3-1 field planting Pattern at corn Density of 5000 plants/acre
As can be seen from tables 3-2, the Crude Protein (CP) content, Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) of soybeans were all significantly higher than corn, while the soluble carbohydrate (WSC) content was significantly lower than corn and < 5%, ensiling alone was not easily successful.
TABLE 3-2 semen Phaseoli Radiati and semen Phaseoli Radiati mixed silage raw material characteristics
As can be seen from tables 3-3, the pH, ammoniacal nitrogen/total nitrogen and butyric acid contents of the soybean silage alone are not within the safe ranges, so that the soybean silage alone fails.
In the mixed storage treatment of the corn and the soybean, the pH, the ammoniacal nitrogen/total nitrogen, the lactic acid and the butyric acid content all reach the standard of safe ensiling fermentation, and the corn and the soybean can be safely stored.
TABLE 3-3 fermentation quality under different row ratios of Soybean and corn mixed storage treatment
The nutritional ingredients are as in tables 3-4 (trends consistent with examples 1 and 2):
TABLE 3-4 nutrient composition of corn and soybean with different blending storage treatments
Example 4
Experiment of feeding
The test is carried out in Yucheng county in Shandong province from 1 month and 12 days in 2019 to 3 months and 31 days in 2019, the total number of the test is 75 days, the sheep farm is selected as Yucheng Dubang livestock breeding professional cooperative society, and the cattle farm is selected as a local individual farmer.
20 Duhu sheep (the hybrid of DuPo sheep and Hu sheep) with similar weight and good health condition and 6 Ximen Tuer beef cattle are selected, and the mutton sheep are randomly divided into 2 groups of 10. The control group (CK) was fed with cellar-type whole-plant corn silage provided by local companies, and the test group (T) was fed with maize wrapped silage instead of local silage (as seen from the above study, the mixing and storing trends were consistent, and the ratio of corn to soybean was 2:3, preferably 2:2 and 2:4, so the feeding experiment was performed with 2:3 mixing and storing treatment).
Beef cattle were randomly assigned to 2 groups of 3 animals each. The control group (CK) fed the pit corn stalk yellow silage provided by local farmers, and the test group (T) used the green silage wrapped by the beans to replace the local silage.
Composition of daily ration
The coarse feed for feeding the mutton sheep is selected from peanut vine, whole corn silage and jade bean wrapped silage, and the concentrated feed comprises corn, bean pulp, premix, soda, salt and probiotics; the coarse fodder for feeding beef cattle is corn stalk yellow storage, and the concentrated fodder comprises corn flour, soybean meal, cottonseed meal, bran, pig feed, soda and salt. The concrete matching is as the following table.
TABLE 4-1 sheep feed test diet composition (g/only/d)
TABLE 4-2 daily ration composition for cattle feeding test (g/head/d)
Feeding management
During the test period, the sheep treated at the same time is a fence, the ear number is used as a mark, the interior of the fence is kept clean and dry, and the fence is disinfected regularly; one week of pre-feeding is needed before the formal test (mainly based on the actual situation), 1/3 and 2/3 with the addition proportion of the semen phaseoli radiati silage in the feed in the pre-test period being the required replacement proportion are gradually added until the addition proportion of the semen phaseoli radiati silage in each group of feed reaches the test requirement; the feeding amount of the feed is 5-10% of the remaining amount, and water is freely drunk after the feed is taken.
Index of growth performance
Average Daily Gain (ADG): test sheep were weighed at the beginning of the test and on days 30, 60 and 90 of the test, and the average daily gain for each group was calculated.
Average Daily Feed Intake (ADFI): in the test period, the feeding amount and the residual amount of the test sheep are accurately recorded every day, and the average daily feed intake is calculated.
Analysis of results
In the experiment, the mixed silage with the soybean row ratio of 2:3 is used for a local feeding effect experiment, and local feed is used as a control. As is clear from tables 4-3 and tables 4-4, the daily gain of the mixed fodder was increased by 29.26% compared with the local corn single fodder in the comparative test of cattle feeding, while the daily gain of the mixed fodder in the present test was also increased by 13.61% compared with the local corn single fodder in the sheep aspect. The result shows that the average daily gain of the beef cattle and the beef sheep can be increased by the green storage of the mixture of the soybeans, the rapid growth of the beef cattle and the beef sheep can be promoted, and the feed conversion rate can be improved.
TABLE 4-3 weight gain of cattle and sheep tested
The effect of the mixed storage feed of the cajan beans on the weight gain of the beef cattle and the mutton sheep is shown in the table 4 to 4.
TABLE 4-4 weight gain in cattle and sheep tested
To summarize: when soybeans are separately ensiled, the pH value is higher than 4.2, the ratio of ammoniacal nitrogen to total nitrogen (10%) and the content of butyric acid (1%) both exceed the standard of safe ensilage, so that the soybeans are not suitable for separate ensilage;
compared with the corn single storage, the crude protein content of the jade bean mixed silage is increased by 13.86-19.59%, the row ratio of the corn to the soybean is 2:2, the fiber content of the corn treated by 2:3 is lower than that of the corn single storage, and the fiber content of the corn treated by 2:4 is not obviously different from that of the corn single storage; the fiber content of the mixed storage of the corn and the soybean is obviously lower than that of the single silage of the soybean; compared with the corn single storage, the corn and soybean mixed storage greatly improves the protein content; compared with the single storage of the soybean, the fermentation quality is greatly improved. Compared with corn silage, the jade bean mixed silage can increase the average daily gain of beef cattle and sheep, promote the beef cattle and sheep to grow quickly, and improve the feed conversion rate.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of corn and soybean mixed silage comprises the following steps:
taking every 2 rows of corns as one belt, and interplanting one belt of soybeans between every two belts of corns, wherein the planting rows of the soybeans in each belt are 2-4 rows;
and harvesting the corn and the soybean at the same time, and performing wrapping and ensiling.
2. The method according to claim 1, wherein the total width of a belt of corn and a belt of soybean is 190 to 230 cm.
3. The method according to claim 1 or 2, wherein the row pitch of corn in each band of corn is 40cm, the row pitch of soybean in each band is 30cm, and the distance between adjacent corn band and soybean band is 50 to 60 cm.
4. The preparation method according to claim 1, wherein the corn is planted at a density of 4000 to 5000 plants/mu.
5. The method according to claim 1 or 4, wherein the soybean is planted at a density of 8000 to 12000 plants/mu.
6. The method of claim 1, wherein the harvesting is at a time when the corn is in the 2/3 dairy stage.
7. The method of claim 1, wherein the harvesting comprises mechanical harvesting.
8. The method of claim 1, wherein the soybean is not nitrogen fertilized.
9. The corn and soybean mixed silage prepared by the preparation method of any one of claims 1 to 8.
10. The use of the corn soybean mixed silage of claim 9 for increasing body weight in livestock.
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