硫肥对内蒙古典型草原牧草产量和品质及绵羊生产的影响  

Influence of Sulfur Fertilizer on Productivety of Herbage and Performance of Chinese Merino fine Sheep (Wether) in Inner Mongolia Steppe

作　　者：姚依群[1,2] 汪诗平[1,2] 王艳芬[1,2] 

机构地区：[1]中国科学院植物研究所,北京100093 [2]内蒙古草原生态系统定位研究站

出　　处：《草地学报》1997年第4期236-243,共8页Acta Agrestia Sinica

基　　金：国家自然科学基金;内蒙古草原生态系统定位研究站开放站基金

摘　　要：该试验于1995－1996年在内蒙古草原生态系统定位研究站进行。土壤类型为沙质栗钙土，0－30cm土层有机质含量1．50％左右，有效硫含量8ppm分别设在三块1hm2的围栏样地，1995年5月一次性施入0、30和60kg硫肥（CaSO4．2H2O），分别定期测试草原群落生产力、主要草种地上生物量以及1．5岁内蒙古细毛羊（羯羊）的体重和羊毛等生产性能。结果表明，在雨水较充足的年份（如1996年），施硫肥可以提高草原生产力，其中尤以羊草和冷蒿显著，同时改善了牧草的品质，提高其含硫量，其中羊草、冰草等六种牧草的含硫量提高明显，含P量也普遍提高；而含K量除星毛萎陵菜有所降低外，其余的均有明显提高。对含N量的影响不大，牧草中的N：S比有所下降。硫肥对绵羊的生产性能影响较大。硫肥提高了牧草的消化率，加快了羊毛的生长速度，与对照相比，两种施S肥的羊毛绝对长度分别提高了11．45％和13．69%，净毛产量提高了20．37％和25．93％，显著地改善了羊毛的细度和强伸度，而绵羊的来食量和日增重无显著差异。The experiment was conducted at IMGERS during l995 ~ l995. The soil type of experi-mental field is sandy chestnut. The organic matter was about 1. 5 % and available sulfur was no more than8ppm in the top of 0 ~ 30cm soil. The sulfur fertilizer of 0、30 and 60 kg S (CaSo42H2O) were applied to be samle sites fenced Of 1 hm2 in May 1995. The stocking raes were 4 sheep/hm2. The biomass ofaborve-and underground for communities, the biomass of aboveground for main population of herbages andpeiformances of sheep were measured. The concentrations of N, P, S, K were analysed in Lermus chinesis ,Agropyron cristatun, Cleistognes Carex duriuscula, Artimisia frigida , Medicago ruthenica, Potentilla a-caulis and Allium bidenlatum. The results showed that sulfur fertilizer can increase productiveties of commuities of pasture and mainpopulations, such as Leymus chinense and Artemisia. The concentraions of S were increased sig-nificantly except Cleistogenes squarrosa and Potensilla acaulis. The concentrations of p were increased significantly except Medicago ruthenica and of K were varied with different herbages; but the concentrationof N were almost not responsed. There were no significant difference on daily average gain and intake of dry matter, but the apparentdigestion of DM can be increased; the absolute length of wool were increased by 11. 45 % and 13. 69%,respectively; the net weight of wool were increased by 20. 37 % and 25. 93 %, respectively; the qualities of wool such as fine degree and strength were improved significantly.

关 键 词：硫肥 内蒙古典型草原 牧草 产量 品质 

分 类 号：S812.4[农业科学—草业科学]