水土保持学报2017，Vol.31Issue(6)：134-138,5.DOI:10.13870/j.cnki.stbcxb.2017.06.023
湘中丘陵区紫色土坡耕地水土保持措施效益的试验研究
Experimental Study on Benefits of Soil and Water Conservation Measures on Purple Sloping Farmland of the Hilly Area in Central Hunan
摘要
Abstract
Selecting Hengnan County as the experimental area,runoff plots with the same slope and the same cropping pattern were set up,and the control experiments of different soil and water conservation measures were carried out.We studied the soil erosion modulus of sloping farmland and the benefits of soil and water conservation measures through observing and analyzing the annual rainfall runoff and sediment.The results showed that:(1) In 2016,19 rainfalls with runoff were observed,and the rainfall was 1 145 mm,which was belonged to normal rainfall year;(2) The soil erosion modulus of bare slope without any protective measures was 4 450.57 t/(km2 · a),reaching moderate erosion;(3) Compared with the bare slope,farmland had the effect of soil and water conservation,and different measures had significant difference in reducing runoff and sediment yield.Water conservation effect (decrease ratio of annual surface runoff) from large to small listed in the order of stone dike terraces (85.07％)＞slope terraces (81.50％)＞earth dike terraces (64.57％)＞hedgerow (57.96％)＞slope farming (37.49％).Soil conservation effect (decrease ratio of annual sediment yield) followed the order of stone dike terrace (98.74％)＞slope terrace (98.66％)＞earth dike terrace (97.39％)＞hedgerow (86.16％)＞slope farming (61.98％).Stone dike terrace and slope terrace showed better effect in soil and water conservation.In this study,the background value of soil erosion was observed accurately,and the benefits of the main soil and water conservation measures were evaluated quantitatively.关键词
紫色砂页岩/坡耕地侵蚀模数/径流量/产沙量/治理措施效益Key words
purple sand shale/slope farmland erosion modulus/runoff/sediment yield/benefits of control measures分类
农业科技引用本文复制引用
周洋,姜敏,李梦雨,王军光,胡玉法,蒲勇平,刘涌..湘中丘陵区紫色土坡耕地水土保持措施效益的试验研究[J].水土保持学报,2017,31(6):134-138,5.基金项目
国家自然科学基金重点项目“花岗岩风化岩土体特性的地带性分异及崩岗形成机理研究”(41630858) （41630858）
