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以青贮玉米品种渝青玉3号为研究对象,分5个采收期研究了不同采收期对青贮玉米品质和产量的影响。结果表明:采收期对青贮玉米品质和产量均有不同程度影响。随着采收期推迟,干重一直增加,鲜重不断降低,秸秆中ADF和NDF含量不断增加,粗蛋白含量和IVODM不断降低,粗脂肪含量先升高后下降,籽粒中粗蛋白和赖氨酸含量呈下降趋势,粗淀粉含量呈上升趋势,粗脂肪含量先上升后下降,授粉后27~34 d是最佳采收时期。
Taking silage maize variety Yuqingyu 3 as research object, the effects of different harvesting periods on quality and yield of silage maize were studied in five harvesting periods. The results showed that harvested corn had different effects on the quality and yield of silage corn. With the postponement of harvesting period, the dry weight increased continuously and the fresh weight continuously decreased. The content of ADF and NDF in straw increased continuously, the crude protein content and IVODM decreased continuously. The content of crude fat increased first and then decreased. The contents of crude protein and lysine The acid content showed a downward trend, the content of crude starch increased, the content of crude fat increased first and then decreased, and the best harvest time was 27 ~ 34 days after pollination.