摘要
通过种植百喜草、保留自然生杂草和清耕(对照)3种小区处理,在自然条件下,分别于5月、7月和8月共选取3次典型降雨,测定成熟脐橙果园梯田里的水土流失面源污染情况。结果表明:产流和产沙量方面,种植百喜草<保留自然生杂草<对照;全氮、全磷和全钾流失量方面,总体上为种植百喜草<保留自然生杂草<对照;径流水样中重金属Ni、Cu、Cr、Zn、Pb、Cd和Hg流失方面,种植百喜草<对照,保留自然生杂草与种植百喜草相近。种植百喜草、保留自然生杂草在拦蓄径流和泥沙、消减重金属污染以及减少氮磷钾流失方面有显著效果。
In a typical navel orange orchard in the southern Jiangxi province, three treatments of （1） planting the grass Paspalum natatu, （2） remaining natural grasses, and （3） the uncovered were conducted in order to study the orchard soil erosion and derived non-point pollution. Three respective measurements under selected natural rainfalls were analyzed. Results showed that, a） in runoff and sediment yielding, （1）〈（2）〈（3）;b） in producing TN, TP, and TK, （1）〈（2）〈（3）;c） for Ni, Cu, Cr, Zn, Pb, Cd and Hg contents, （1）〈（3）, and （2） is similar to （1）. The above results clearly indicated that planting grass as well as remaining natural grasses can play signiifcant role in reducing soil erosion and heavy metal pollution.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2015年第5期74-77,89,共5页
Journal of Central South University of Forestry & Technology
基金
国家科技支撑计划项目(2012BAC11B05)
江西省水利厅科研项目(KT201329)
关键词
脐橙园
水土流失
氮磷钾流失
重金属污染
赣南
navel orange orchard
soil erosion
N,P,K loss
heavy metal pollution
southern Jiangxi province
