关键词: 硫肥, 内蒙古典型草原, 牧草产量和品质, 绵羊生产性能

Abstract: 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 frigida.The concentraions of Swere increased sig-nificantly except Cleistogenes squarrosa and Potensilla acaulis.The concentrations of pwere 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.

Key words: S fertilizer, Productive of Pasture, Performance of sheep, Inner Mongolia steppe