毕节地区地处云南东部高原向贵州中部山原丘陵过渡的斜坡地带 ,境内沟壑纵横 ,地形破碎 ,水土流失严重 ;地下水资源蕴藏量大 ,但有效利用率低 ;降雨丰富 ,平均年降雨达 110 0ｍｍ左右 ,但时空分布不均 ,春伏旱发生频繁。在 39.6万ｈｍ2 耕地中 ,旱地占 85.2 % ,属旱作雨养农业 Bijie region is located in the slope of the plateau of eastern Yunnan to the hilly region of central Guizhou in the transition from ravine to ravine, the terrain is fragmented and soil erosion is serious; the groundwater resource reserves are large, but the effective utilization rate is low; rainfall is abundant, with an average annual rainfall of about 110 mm , But the spatial and temporal distribution is uneven, and the spring drought occurs frequently. Among the 396,000 hm2 cultivated land, dry land accounts for 85.2% of the total cultivated land, which is rain-fed agriculture