用PAM和抗旱剂进行高效抗旱抗蚀雨养农业机理及体系研究

Insufficient rainfall and shortage in irrigation water resources on the Loess Plateau and other arid and semiarid regions of Northwestern China cause very lower and unsteady crop yields, and sometimes even total failure of crops due to prolonged period of draughts. Intensified heavy rains, on the other hand induce severe rainfall runoff and water erosion and the utyilization rate of rainfall available to crops decreased. Runoff/runon in farming practises, combined with application of PAM can increase infiltration rate of precipitation into soil profile, which provide sufficient water to meet the requirement of crop consumption by adding extra water into runon fields from runoff sections. The suggested runoff farming system has capability of reducing water loss and soil erosion, increaqse water use efficiency and capability of draught tolerance, to ensure high and reliable crop yield.

我国西北黄土高原及其它干旱半干旱地区降雨不足，又缺乏灌溉水资源，作物产量低而不稳，干旱常导致作物死亡绝收。集中暴雨又造成水土流失、雨水利用率降低。利用土壤结构稳定剂PAM增加降雨入渗、用作物蒸腾抑制剂减少旱季作物耗水、用径流叠加满足作物需水。⑿碌母咝в暄┳魈逑担跎偎亮魇А⒃銮颗┮档钟珊的芰Α⒈Ｖづ┮蹈卟炔