CAJ | 학술논문

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。
통과충식백희초、보류자연생잡초화청경（대조）3충소구처리，재자연조건하，분별우5월、7월화8월공선취3차전형강우，측정성숙제등과완제전리적수토류실면원오염정황。결과표명：산류화산사량방면，충식백희초＜보류자연생잡초＜대조；전담、전린화전갑류실량방면，총체상위충식백희초＜보류자연생잡초＜대조；경류수양중중금속Ni、Cu、Cr、Zn、Pb、Cd화Hg류실방면，충식백희초＜대조，보류자연생잡초여충식백희초상근。충식백희초、보류자연생잡초재란축경류화니사、소감중금속오염이급감소담린갑류실방면유현저효과。
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.