摘要
草地系统的安全健康关系到当地畜牧业的可持续发展。运用1978-2008年天水市关山南麓地区历年畜群数及清水、张家川气象站牧草生长期历年日照时数、平均温度及降水量测量值,构建评价该地草地压力的指数模型分析该地区畜群数、草地生产潜力及草地压力指数的动态变化。结果表明:近30年来天水市关山南麓地区畜群数随年份以1.76×104羊单位/a的速度逐年增加,草地生产潜力变化不大,草地生态压力指数以0.02/a的速度逐年上升。近5年来草地严重超载,畜群数已超过了草地的承载能力。适当限制畜群规模及扩大草地面积是未来当地畜牧业可持续发展的主要途径。
The safe and health of grassland ecosystem is very important for the sustainable development of animal husbandry.Based on the animal population data in the area of south slope of Guanshan and the climate data regarding to sunshine duration,temperature and precipitation in Qingshui and Zhangjiachuan Weather Stations in 1978 to 2008,the model of grassland pressure index was established to analyze the dynamic variation of animal population,grassland potential production and pressure index.The result showed that the annual animal population increase was 1.76×104 sheep units;potential grassland production changed little and ecological pressure index increase was 0.2 since 1978.It indicated that the ecological pressure index increased greatly in the last 5 years and the animal population was over the capacity of the grassland.The main way for sustainable animal husbandry development was to control the animal population and expand the grassland area.
出处
《草业科学》
CAS
CSCD
北大核心
2010年第9期19-24,共6页
Pratacultural Science
基金
甘肃省气象局"十人计划"
国家科技部公益行业专项(GYHY200806021)
关键词
关山南麓
草地
压力
变化
天水市
south of Guanshan
grassland
press
variation
Tianshui City
