赣东北低丘红壤区水资源的特点及其综合开发利用

Study on Temporal and Spatial Variations ofWater Resources and Its Comprehensive Utilizationin Low -hilly Red Soil Area

本文全面分析了低丘红壤区的降水蒸发，土壤贮水供水和作物的耗水规律。表明降水量超前于潜在蒸发量变化是伏秋旱的主因。红壤的贮水空间又不多．能够供植物利用的有效水更低，仅占红壤总库容的１／５。只是其通透库容较大，深层水分比较丰富而稳定，通过农林复合等途径调控深层水分，促进土壤一植物一环境间的水分交换。

Based on analysis of rainfall, evaporation, water storage and supply, and waterconsuniption by crops in low-hilly red soil areas, it was suggested that the major reason for au-tumnal drought was that rainfall anteceeded latent evaporation. Red soil could supply only inade-quate amount of available water as a result of its limited water storage capacity. It was, however,large in storage capacity of peanieable water, and enriched with stable underground water. Bymeans of agroforestry and other measures, it was possible to adjust underground water level andimprove water cycle in the soil-plant-environment system, which was fundamental in the de-velopment and utilization of resources in low-hilly red soil area.