水土保持学报2017，Vol.31Issue(3)：102-105,4.DOI:10.13870/j.cnki.stbcxb.2017.03.018
果园生草对氮素表层累积及径流损失的影响
Effects of Cover Crop (Vulpia myuros) on the Accumulation and Runoff Loss of Nitrogen in Orchard
摘要
Abstract
In order to correctly understand the control effect of grass cover on non-point source pollution and promote the construction of ecological orchard,a research was carried out to study the effects of cover crop (Vulpia myuros) on the accumulation and runoff loss of nitrogen.Three management modes,including grass cover on soil surface until withering (Cov),grass removed (Rem),and cleaning tillage as control (Cle).The results showed that the content of mineral nitrogen in the soil surface (0-1 cm) of the Cov treatment was 2.6 and 4.5 times as high as that of the Rem and Cle treatments when the withered grass degraded quickly (in September),respectively.At the same time,the Cov treatment increased the concentration of mineral nitrogen in the runoff by 42.6 ％ and 20.9％,respectively.The Cov treatment decreased the rain runoff by 88.3％-98.7％,and increased the rain leakage by 42.1％-97.6％ when compared with the Cle treatment.The results of three rainfall events showed that the runoff loss of mineral nitrogen was 90％ lower than that of the clean tillage,and deep layer (25 cm) leakage was increased by 89.6％.In conclusion,planting grass and covering it on the soil surface in orchard is an advantageous management to prevent non-point source pollution by reducing nitrogen loss through runoff.关键词
径流/果园生草/氮素流失/面源污染Key words
runoff/orchard grass/nitrogen loss/non-point pollution分类
农业科技引用本文复制引用
毕明浩,梁斌,董静,李俊良..果园生草对氮素表层累积及径流损失的影响[J].水土保持学报,2017,31(3):102-105,4.基金项目
山东省自然科学基金项目(ZR2013DQ014) （ZR2013DQ014）
