【摘要】 甜高粱品种九甜杂三在祁连山牧区铺地膜种植其鲜草和干草产量分别达61 745kg/hm2和10521kg/hm2;适宜种植密度33万穴/hm2,鲜草和干草产量分别达63 476kg/hm2和9674kg/hm2;在拔节期追施尿素150kg//hm2效果最佳;单播或与箭筈豌豆混播总鲜草产量和总干草产量差异不显著。混播灰分含量增加和无氮浸出物的降低对饲草品质有一定影响;混播粗蛋白含量提高5.34个百分点,粗纤维含量降低2.37个百分点,中性洗涤纤维含量降低4.24个百分点,酸性洗涤纤维含量降低2.21个百分点,极大的提高了饲草的品质。更多还原

【Abstract】 Sweet sorghum jiutianzasan cultivated in form of film mulching,whose fresh grass and hay yield was up to 61,745 kg / hm2 and 10,521 kg / hm2 respectively in Qilian Mountain pastoral. The results showed that the suitable cultivation density was 330,000 points / hm2. The yield of fresh grass and hay was up to 63,476 kg / hm2 and 9674kg / hm2 respectively. In addition,it could gain the best performance if 150 kg / hm2 urea was topdressing in elongation stage. However,there was no significant difference between the total output of fresh grass and hay whether mixed sowing with Vicia sativa or not. Forage quality was known to influenced partially by the increase of ash content of mixed sowing and the decrease of nitrogen free extract; crude protein content of mixed sowing increased by 5. 34 percentage points,on contrast,crude fiber content,neutral detergent fiber content and acid detergent fiber content decreased 2. 37%,4. 24% and 2. 21% respectively,which dramatically enhances the forage quality.更多还原