Changing farm livestock and grassland management to improve profitability and sustainability in Sunan county,Gansu province,China
Sunan County is a Yugur Minority Autonomous County in Zhangye Prefecture of Gansu Province.It consists of four separate geographic areas all of which have a significant population of the Yugur Nationality.Farming Gansu alpine fine wool sheep is the principal agricultural system.Sunan is an extremely mountainous region with altitudes ranging between 1,327 and 5,564 metres and an average annual temperature of 3.6 ℃.Sheep are conventionally grazed on winter and spring pastures over the period 20 October to 20 May.The high stocking rates adopted by herders leads to significant grazing pressure,resulting in pasture degradation,a loss of desirable species and soil erosion.Ewes usually lamb in April.This is a time when there is a large gap between the nutritional requirements of livestock and what can be supplied by pasture.The use of a greenhouse shed could overcome many of the management and climatic problems in Sunan by reducing the effect of cold winds and the associated loss in body weight to improve lamb survival.
Gansu alpine fine wool sheep grazing greenhouse pen feed profitability
Z.F.Ma J.P.Wu R.Jones D.Michalk D.Kemp T.Takahashi
Faculty of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China NSW Department of Primary Industries,Orange NSW 2800,Australia Charles Sturt University,Orange NSW 2800,Australia
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）