设为首页  |   加入收藏
引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 58次   下载 0  
分享到: 微信 更多
南方设施菜地填闲苋菜筛选及其氮磷淋失阻控效果研究
范新1, 李浩亮1, 雷孝1, 萧洪东1, 孙海军2, 喻敏1, 施卫明3
1.佛山科学技术学院;2.南京林业大学;3.中国科学院南京土壤研究所
摘要:
筛选经济效益高、易推广,且对夏季休闲期氮磷淋失阻控效果好的填闲作物,对减轻我国珠三角地区设施菜地土壤氮磷流失,保护水体环境具有重要意义。本研究通过淋溶管法研究了夏季休闲期(7月至8月)种植4种苋菜(圆红苋菜、心红苋菜、青苋与马齿苋)对淋溶液pH、无机氮磷浓度及收获后土壤速效养分等的影响。结果表明:苋菜作为填闲作物种植可产生2.04 ~ 2.83万元/hm2的经济效益,同时降低淋溶液NO3–-N,NH4+-N与总P浓度,对三者淋溶损失的阻控效率依次达到31.2 ~ 49.5 %,35.5 ~ 37.5 %和30.1 ~ 43.6 %。与休闲对照处理相比,苋菜种植收获后土壤碱解氮与速效磷养分并没有表现出耗竭,其中速效磷浓度提升31.9 ~ 67.8 %。综合本研究结果:四种苋菜均为可优选的填闲叶菜,皆具较高的减控设施蔬菜休闲期土壤氮磷淋溶损失效率与经济效益,且不影响后茬蔬菜生产的地力基础。其中,心红苋菜在环境效益和经济效益(2.83万元/hm2)方面表现较为突出。
关键词:  填闲作物;设施菜地;氮磷;淋溶损失  面源污染
DOI:
分类号:S19
基金项目:国家重点基础研究发展计划(973计划),
Appropriate plantation of edible amaranth as catch crop to reduce nitrogen and phos-phorus leaching losses from greenhouse vegetable productions in southern China
FAN Xin1, LI Hao-liang1, LEI Xiao1, XIAO Hong-dong1, SUN Hai-jun2, YU Min1, SHI Wei-ming3
1.Foshan University;2.Nanjing Forestry University;3.Institute of Soil Science, Chinese Academy of Sciences
Abstract:
Catch crops with economic value that are easy to popularize and have good effects in controlling nitrogen and phosphorus leaching losses during leisure time are of great significance for reducing nitrogen and phosphorus losses in protected vegetable soils in the Pearl River Delta Region in China. In this study, the leaching tube method was used to study the effects of four kinds of edible amaranth (round red amaranth, heart red amaranth, purslane and barley) planted on the pH, inorganic nitrogen and phosphorus concentration of the leaching solution and the available nutrients in the soil after harvest during summer fallow period (from July to August) were observed. The results showed that the cultivation of amaranth as a catch crop can produce economic benefits ranged from 20,400 to 28,300 yuan/hm2. At the same time, it reduces the concentrations of NO3–-N, NH4+-N and total P in the leaching solution, and the average efficiencies were 31.2 ~ 49.5 %, 35.5 ~ 37.5 % and 30.1 ~ 43.6 %, respectively. Compared with the fallow control treatment, the concentration of available phosphorus nutrients and alkaline hydrolysis nitrogen in the soil after amaranth harvested did not show depletion, and the concentration of available phosphorus nutrients increased to 31.9-68.1%. The results indicated that suitable plantation of four amaranth as catch crop are an optimal technology, all of which can reduce soil nitrogen and phosphorus leaching losses during the vegetable fallow period, and produce certain economic benefits, without affecting the fertility foundation of subsequent vegetable production.
Key words:  FAN Xin1, LI Hao-liang1, Lei Xiao1, Xiao Hong-dong1, *, SUN Hai-jun2, YU Min1, SHI Wei-ming3

您是第3342664位访问者
版权所有 © 《土壤》编辑部
本系统由北京勤云科技发展有限公司设计   京ICP备09084417号