旱稻的水土保持作用及应用前景研究

为有效地根治 2 5°以下缓坡耕地的水土流失又不影响当地的粮食生产 ,对旱稻的水土保持作用进行了试验研究。研究结果表明 ,旱稻生长较快 ,根系发达 ,郁闭期长且正处在一年中的雨季 ,能够保护地面免受雨滴击溅 ,具有截留雨水、提高土壤蓄水能力、改变径流性质等作用 ,是很好的水土保持作物。浙江、四川、贵州、重庆、云南、湖北等省 (市 )都有一定数量的坡耕地 ,一般都不具备灌溉条件 ,不能种植水稻 ,而这一带人喜食米饭 ,旱稻栽培技术又较为简单 ,因此有较为广阔的推广应用前景。

Study on Soil and Water Conservation Function and Application Prospects of Mountain Rice

In order to effectively control soil and water loss of slope land smaller than 25° while not effect the grain production of local area, the function on soil and water conservation of mountain rice has been tested. It is shown by the results that mountain rice grows faster, developed root system, longer closing period just during the rainy season of a year that can protect ground surface from raindrop splashing and has the functions of intercepting rainwater, increasing the capability of soil moisture and changing the nature of runoff. It is a good crop for soil and water conservation. There are a certain amount of slope lands distributed in Zhejiang, Sichuan, Guizhou, Chongqing, Yunnan and Hubei where there is no condition for irrigation and growing rice, but people there prefer having rice. The technology of growing mountain rice is relative simple. Therefore, it has broad prospects for extension and application.