青海旱作全膜双垄沟播甜高粱和复种产量及土壤养分含量  

The yield of sweet sorghum and soil nutrient after planting with multiple cropping,completely mulched and double furrow in Qinghai dryland

作　　者：李春喜[1] 冯海生[1] 郭万春[2] 裴剑民 武玫玲 

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]青海省家畜改良中心,青海西宁810016 [3]青海民和海顺牧业科技有限公司,青海民和810800 [4]青海艺桓农牧合作社,青海西宁810006

出　　处：《草业科学》2015年第9期1530-1535,共6页Pratacultural Science

基　　金：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);青海省作物分子育种重点实验室(2012-ZY10)

摘　　要：为了探讨甜高粱(Sorghum bicolor)在青海旱地种植和复种的效果,在海拔2 000和2 750m分别开展了秋季和春季全膜双垄沟种植试验及冬小麦(Triticum aestivum)收获后复种试验。结果表明,秋季覆膜春季播种,甜高粱生长可进入灌浆期,春季覆膜播种可进入拔节中期,鲜草产量分别为100 845和56 040kg·hm-2,干草产量分别为35 550和9 525kg·hm-2,茎秆糖锤度分别为16.77%和4.40%;复种鲜草产量60 360kg·hm-2,干草产量7 530kg·hm-2,干草中粗蛋白含量达10.50%,粗纤维在30%以下,糖含量达19.71%,品质优良。种植甜高粱后土壤中全氮、全钾、速效氮、速效磷、速效钾和有机质含量降低,全磷和pH值增高。To study the effects of sweet sorghum （Sorghum bicolor） planting and multiple cropping at dry land of Qinghai, the experiments with single sweet sorghum planting in spring and autumn or multiple cropping after the winter wheat （Triticum aestivum） harvest on whole covering on double ridges and planting in catchment furrows （WCDR-PCF） were carried out at two altitudes （2 000 and 2 750 m）. The results showed that the sweet sorghum can enter in filling stage when film in autumn and planting in spring, and the plants can enter in mid-jointing stage when film and planting in spring. The fresh yield,hay yield and stalk brix of these two treatment were 100 845 and 56 040 kg · ha-1 , 35 550 and 9 525 kg · ha-1 and 16.77% and 4.40%, respectively. The fresh and hay yield of multiple cropping sweet sor- ghum were 60 360 and 7 530 kg · ha-1, respectively. In hay grass, the crude protein accounted for 10.50%, crude fiber accounted for less than 30% and sugar content accounted for 19% which suggested the good quality. The soil total nitrogen, total potassium, available nitrogen, available phosphorus, potas- sium and organic matter content decreased after planting sweet sorghum, but the total phosphorus and pH values increased.

关 键 词：旱地 全膜双垄沟播 复种 甜高粱 产量 土壤养分 

分 类 号：S566.5[农业科学—作物学]