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坡地改梯田在旱作农业中的作用——吴堡县大面积水平梯田群体作用的考察 被引量:2

THE IMPORTANT ROLE OF SLOPING LANDS CONVERTED INTO TERRACES IN RAINFED AGRICULTURE
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摘要 吴堡县从50年代开始了以兴修梯田为主的农田基本建设。经过30年共修水平梯田10.51万亩,占总土地面积的16.5%,占耕地面积的57.7%。其梯田占耕地比例在陕西省各县市为最高;梯田田面平整,表土保留好,为旱作粮食大幅度增产奠定了基础,水平梯田亩产一般达300斤以上;蓄水保土减沙作用显著;大量兴建梯田还为改善农业结构和商品生产的发展提供了条件。但是,在农村实行生产责任制等的情况下,对水平梯田建设目标和发展潜力,补修和新修及管护、使用中的一些政策性问题等,应予以重视和研究。 The basic capital farmland construction with priority given to terraces in Wubu county started in 1950s. After more than 30 years' hard work, level terraces constructed total 105,100 mu, accounting for 16.5% total area and 57.7% of arable lands in the county. Terrace lands in the county occupy the highest percentage of arrable lands among the counties and munipalities in Shaanxi province. Terrace lands have the level land surface and the good ability to conserve surface soil, thus, laying a solid foundation for yield increase of rainfed agriculture by a wide margin.The crop yield per mu terrace land can reach over 300 kg in general. Terraces play an apparent part in storing moisture, conserving soil and reducing sediments. Constructing terraces on a large scale will provide good conditions for improving agricultural structures and commodity production. Bat,in case of practising the productive responsibility system in the rural area, attention should be paid to the objectives, developing potentials,maintainance, management of level terrance construction and some policy problems in usiag terraces.
出处 《干旱地区农业研究》 CSCD 北大核心 1989年第3期1-9,共9页 Agricultural Research in the Arid Areas
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