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1选用优良品种1.1粮饲兼用型优良玉米品种的特点生长速度快,茎叶繁茂,生物产量高,一般生物产量不低于60t/hm2。在籽粒蜡熟后期玉米秸秆经青贮后,可作为反刍动物的饲料,其消化率可达60%～70%,在相同精料的条件下,料肉比可降低50%左右。其特征:营养成分高,养分均衡,茎秆多汁,含糖量高;穗部干物质与全株干物质比例适当(干物质比例过高,会造成淀粉含量增加,纤维素消化能力下降);具有较强的抗旱性、抗倒性和抗病虫能力;饲料营养价值较高。具有较高的脂肪含量和蛋白质含量。
1 Selection of elite varieties 1.1 The advantages of food and feed with good corn varieties Fast growth, lush stems and leaves, high biological yield, the general biological yield of not less than 60t / hm2. The corn stalks can be used as the feed for ruminants after the silage of the wax grains is ripened, and the digestibility of the corn stalks can reach 60% -70%. Under the same concentrate condition, the feed conversion ratio can be reduced by about 50%. Its characteristics: high nutrient content, balanced nutrition, succulent culm and high sugar content; suitable ratio of dry matter to whole plant dry matter (too high dry matter content will result in increased starch content and decreased cellulose digestibility) ; Has strong drought resistance, lodging resistance and pest resistance; feed nutritional value is higher. Has a high fat content and protein content.