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在水土保持工作中,大竹县针对25度以上陡坡耕地退耕还林还草并且不减少当年经济收入问题,于1985年7月建立了大竹县乌木滩水土保持试验点,同年8月正式投入观测,进行苎麻与水土保持林保持水土效益的对比试验。现将试验结果介绍如下: 一、小区布设及观测方法 试验点设在大竹县城以东10公里的乌木乡豹子垭口。该区属中丘地带,平均海拔400m,系长江水系大洪河流域发源地。降雨集中,多年平均降雨量1182.0mm,4～10月降雨占全年降雨量的85％左
In the work of soil and water conservation, Dazhu County established a trial site for soil and water conservation of Wu Mu Tan in Dazu County in July 1985 for the purpose of returning farmland to forests and pastures on steep slopes above 25 degrees without reducing the economic income of the year. In August of the same year, the project was officially put into observation, Comparative Experiment on Maintaining Soil and Water Benefits of Ramie and Soil and Water Conservation Forest. Now the test results are introduced as follows: First, the plot layout and observation methods Test point is located in Dazhu County, 10 kilometers east of Wu Mu Xiang Leopard Pass. The area belongs to the mid-hill area, with an average elevation of 400m, which is the birthplace of the Dahonghe River basin. Rainfall concentration, the average annual rainfall of 1182.0mm, April to October rainfall accounted for 85% of the annual rainfall