Study On Technology Of Mixed Harvest And Mixed Storage Of Silage Maize And Cole Intercropping

In order to solve the problem of low protein content of maize silage,high protein content of cole and large water content,which is not conducive to silage,the balance between energy and protein feed was realized.In this experiment,early maturing silage maize De Meiya 1 and forage cole Hua Za 62 were used as materials.The experiment set up four planting methods（silage maize monoculture,forage rape monoculture,silage maize and cole 2:4 intercropping,silage maize and rape 2:2intercropping）,four harvest periods（August 20,August 30,September 10,September 16）,among which the intercropping set up three mixed harvest and mixed storage ratios（1:1,1:2,2:1）,respectively Quality（crude protein,fat,neutral detergent fiber,acid detergent fiber,starch,total digestible nutrients,net energy）and other indicators were determined.The results show that:1.Intercropping of silage corn and rape in different proportion will not affect the growth process of the two crops.Whether it is monoculture or intercropping,it takes about 128 days from seedling emergence to milk maturity for De Meiya 1 and 114 days for Hua Za 62.2.The yield of silage maize and cole intercropping of different proportions is higher than that of cole alone and lower than that of silage maize alone.The yield of intercropping of 22?is higher than that of intercropping of 22.?The maximum yield of silage maize was 28.27t·hm^-2,which was 12.76%higher than that of the harvest on September 10,harvested on September 16 before early frost.The maximum yield of cole was 11t·hm^-2 on September 10,which was 29.41%higher than that on September 16.On September 16,the yield of intercropping 2:4 was16.3t·hm^-2,which was 17.86%higher than that of intercropping 2:2,91.76%higher than that of cole monoculture,and 42.34%lower than that of silage maize monoculture.3.The quality of silage was significantly affected by the harvest period and the proportion of mixed harvest and silage.With the delay of harvest period,the contents of crude protein,crude fat,starch and digestible nutrients were firstly increased and then decreased,and the specific expression was September 10>August 30>August 20>September16;The neutral detergent fiber and acid detergent fiber showed a trend of decreasing first and then rising,and the specific performance was September 10<August 30<August 20<September 16;The water content showed a downward trend,which showed as September 16<September 10<August 30<August 20.Harvest on September 10,silage maize and cole 1:2ratio of mixed charge storage optimum moisture content of 70.86%,its protein content is 12.5%,13.48%higher than that of silage maize single storage,fat content is 12.6%,higher than 2.32 times of silage maize single storage,starch content was 23.81%,higher than that of cole single storage6.44 times,total digestible nutrients reaches 75%,than silage maize,cole single storage increased by 8.7%and 13.64%respectively.The net energy for lactation,maintenance and weight gain were 1.71%,1.84%and 1.21%,respectively.Based on the above research results,in the northwest of Hebei Province,silage maize and cole was planted,in silage maize milk stage（September 10）can obtain maximum yield,harvest and silage maize and cole in a ratio of 12?storage,can significantly reduce the cole moisture content,increase the crude protein content and fat content of feed,increase feed of digestible nutrients.