根据北方农牧交错带（定西县1970～2000年）的气候资料，分析了该地区30年来气候变化周期、趋势及其草地气候生产力的变化。
According to climate data(1970~2000) in the northern farming and pastoral area, the climate change cycle, trend and grassland climate productivity about 30 years were analyzed.
方法：对临洮、康乐、定西、和政4县1999 - 2002年部分妇幼卫生指标进行调查分析。
Methods: Partial maternity and child hygiene indexes (1999-2002) of 4 least developing counties of this province were investigated and analyzed, Lintao, Kangle, Dingxi.
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