祁连山牧区种植甜高粱及与箭筈豌豆混播的产量和品质研究  

STUDY ON THE YIELD AND QUALITY OF DIFFERENT DENSITY AND AMOUNT OF TOP DRESSING UREA OF SWEET SORGHUM(SORGHUM BICOLOR)JIUTIANZASAN AND MIXED SOWING WITH VICIA SATIVA IN QILIAN MOUNTAIN PASTORAL AREAS

作　　者：李春喜[1] 叶润蓉[1] 孙菁[1] 周玉碧[1] 邓娟[1,2] 闫慧颖[1,2] 

机构地区：[1]中国科学院西北高原生物研究所中国科学院高原生物适应与进化重点实验室,青海西宁810001 [2]中国科学院大学,北京100049

出　　处：《青海草业》2015年第4期9-13,17,共6页Qinghai Prataculture

基　　金：国家科技支撑计划"干旱沟壑型小流域综合治理技术集成与示范课题"(2012BAC08B06);青海省科技厅项目"粮饲兼用甜高粱品种选育与饲喂技术示范"(2012-N-504)

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。Sweet sorghum up to 61,745 kg/hm2 and jiutianzasan cuhivated in form of film 10,521 kg/hm2 respectively in Qilian mulching, whose fresh grass and hay yield was Mountain pastoral. The resuhs showed that the suitable cultivation density was 330,000 points/hm2. The yield of fresh grass and hay was up to 63,476kg/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.

关 键 词：甜高粱 密度 追肥 混播 产量 品质 

分 类 号：S812.5[农业科学—草业科学]