摘要
【目的】研究不同种植模式对地表径流和渗漏水的土壤表层氮、磷随降雨流失的情况。【方法】在渔洞水库流域的大田里设计了4种典型的作物种植类型。采用分光光度法测定样品中的氮、磷浓度。【结果】不同作物种植模式下地表径流中氮素流失质量浓度总体呈现先下降后上升,之后逐步下降的趋势,土壤渗透水相中氮素流失无明显变化趋势;不同作物种植模式对磷素流失质量浓度影响较大,地表径流和土壤渗透水相中磷素流失平均浓度较高的为苹果(0.71、0.99 mg/L)和青花(0.24、0.27 mg/L)。【结论】该试验设计合理,能为研究不同种植模式的氮磷流失量和吸收规律提供一定的理论依据,也可以为河流附近环境保护区的种植模式选择提供参考。
【Objective】The purpose of the article is to research the characteristics of nitrogen and phosphorus loss from surface soil affected by different cropping pattern.【Method】Four typical crop planting types were designed in the field of the Yudong reservoir basin. The concentration of nitrogen and phosphorus in the samples was determined by spectrophotometry.【Result】The results of field experiments showed that surface runoff nitrogen loss concentration showed from decrease to increase,and then decrease. There is no obvious trend of nitrogen loss in soil infiltrating water. Different planting patterns had great influence on the phosphorus loss concentration. The phosphorus loss in apple（0. 71,0. 99 mg/L） and broccoli（0. 24,0. 27 mg/L） planting pattern was higher than others. 【Conclusion】The results indicated that experimental design was reasonable,so the results of this study could provide a theoretical basis not only for studying nitrogen and phosphorus loss and absorption law of different planting patterns,but for selecting the planting pattern of the environmental protection area near river.
作者
李学艳
全勇
龚声信
岳银
余勇
马鹏
唐玉凤
沈燕琼
LI Xue-yan;QUAN Yong;GONG Sheng-xin;YUE Yin;YU Yong;MA Peng;TANG Yu-feng;SHEN Yan-qiong(Agricultural Environmental Protection Monitoring Station of Zhaotong,Yunnan Zhaotong 657000,China;Agricultural Products Quality and Safety Inspection and Testing Center in Zhaotong,Yunnan Zhaotong 657000,China)
出处
《西南农业学报》
CSCD
北大核心
2018年第7期1481-1484,共4页
Southwest China Journal of Agricultural Sciences
基金
昭通市政府渔洞水库水资源保护专项(20140109)
关键词
昭通
渔洞水库
种植
径流
氮磷
Yudong reservoir
Cropping
Runoff
Nitrogen and phosphorus
