河南旱作农区水分特征与节水农业途径

 根据年降水量80%保证率、干旱频率和降水-蒸发差额分划出河南旱作农区范围，北起省界，南至沙、颍河。分析其降水、土壤水分和灌溉水资源等特征。指出平原以种植小麦为主并采用防旱轮作制，可充分利用自然降水；山区开展蓄水保土为中心的基本农田建设，为近期节水农业途径。

MOISTURE CHARACTERISTICS AND THE WAY OF SAVING WATER FARMING IN HENAN DRYLAND

Dryland farming in Henan is scattered over the vast area. It ranges from the north of the province to the Sha and Ying Rivers. The arid areas has delimited by these indexes: more than 80% of the cumulative frequency of annual precipitation, and arid frequency, and range of potential evapotranspiration and precipitation. To analyse these characteristics the rainfall, the soil moisture and the water resources for field irrigation have been studied. The ways of water saving farming are as follows: Planting wheat should be taken as the key link and adopt crop rotation systems to prevent drought and to make full use of the rainfall in plains: taking soil improvement and water conser vation as its central task, and developing capital field construction in hilly areas.