茬高及刈割茬次对饲用玉米生长及营养成分的影响

Effects of stubble height and cutting times on growth and nutrient composition of Forage Maize

研究发现甘肃省渭源县二阴山区广泛种植的饲用玉米品种＂三盛308＂适应性强、耐刈割,第1、2、3茬的平均分蘖数为11.88支/株、9.64支/株、8.97支/株,单株鲜草平均质量为309.32 g/株、242.71 g/株、214.93 g/株。粗蛋白、粗纤维、干物质、磷、钙元素随刈割次数增加而下降,粗灰分和粗脂肪不受刈割影响,鲜草胡萝卜素含量随刈割次数增加呈现先上升后下降趋势。

The study found that corn varieties of ＂Sansheng 308＂widely planted in the mountain area of Weiyuan county in Gansu had the characteristics of better adaptability and mowing resistance,the average number of tillers 1 st,2 nd,3 rd stubble was 11.88 branches/plant,9.64 branches/plant,8.97 branches/plant respectively,the average quality of the fresh plant was 309.32 g/strain, 242.71 g/strain, 214.93 g/strain respectively. Further crude protein, crude fiber,dry matter,phosphorus and calcium decreased with the increase of mowing times,without mowing effect of the crude ash and crude fat, the carotene content in the fresh grass increased and then decreased with the increase of mowing frequency.