首页 | 本学科首页   官方微博 | 高级检索  
     检索      

浙北水稻主产区田间土-水磷素流失潜能
引用本文:张志剑,王珂,朱荫湄,郭敏红,周顺根.浙北水稻主产区田间土-水磷素流失潜能[J].环境科学,2001,22(1):98-101.
作者姓名:张志剑  王珂  朱荫湄  郭敏红  周顺根
作者单位:1. 浙江大学环境与资源学院,杭州,310029
2. 杭州市余杭农科所,杭州,311113
基金项目:浙江省科技计划项目(99-2-030);浙江省自然科学基金项目(496028)
摘    要:选取嘉善、余姚、德清、余杭 4个具有代表性浙北水稻主产区 ,研究了水田土 水磷素流失潜能及环境意义 .4稻区高水平磷肥投入促进了土壤富磷化 ,土壤Olsen-P积累的同时 ,相应地提高了土壤生物性有效磷、水浸提磷 ,并提高了土壤磷素的流失潜能 .稻区土壤在富磷化过程中 ,存在着土壤磷素的农学意义向环境意义方向演变的趋势 .在非植稻期 ,稻区农田水体 ,包括沟渠水、田表水、排渠水、暗管排水等总磷 (TP)平均超过了易诱发水体富营养化临界值 ,其中溶解磷 (DRP)占总磷 40% ;主要是源于绿肥田表水及部分排渠中的溶解磷对稻区外水体构成了直接危害 .在非植稻期 ,因稻区间农耕措施的差异导致了土壤富磷水平与对应田表水磷素水平不具相关性 ;在植稻期 ,施磷措施促进水田土壤富磷 ,相应地提高了田表水磷素水平 .

关 键 词:主产稻区  磷素  土水  流失潜能  浙北
文章编号:0250-3301(2001)01-04-0098
收稿时间:2000/6/16 0:00:00
修稿时间:2000年6月16日

Phosphorus Loss Potential of Soil-Water in Sites of the Main Rice-yield Area in the Northern Zhejiang
Zhang Zhijian,Wang Ke,Zhu Yinmei,Guo Minhong and Zhou Shungen.Phosphorus Loss Potential of Soil-Water in Sites of the Main Rice-yield Area in the Northern Zhejiang[J].Chinese Journal of Environmental Science,2001,22(1):98-101.
Authors:Zhang Zhijian  Wang Ke  Zhu Yinmei  Guo Minhong and Zhou Shungen
Abstract:Phosphorus (P) loss potential and its environmental impact from soil water were surveyed in Jiashan Yuyao,Deqing and Yuhang,named main rice yield areas in Northern Zhejiang province China.High P input has resulted in soil P accumulation.Higher soil Olsen P contributed its bio available P,water extracted P and increased soil P loss potential.The role of P in paddy soils is of environmental rather than agronomic concern in the process of soil P build up.During the no rice time,total P (TP) concentration in the various water including ditch drain inside/outside field,field surface water and pipe drain et al are over the critical values associated with accelerated waters eutrophication.The average proportion of dissolved reactive P (DRP) concentration in TP was 40%,however,these current DRP levels in partly ditch drain outside field and surface or ground water in no rice time could not caused serious impact to the outside waters nearby rice yield agriculture area.No significant line correlation between soil P tests and P in field surface water was found in no rice time due to differences in field tillage among rice yield areas,while P application increased both soil P and its correspondingly field surface P level after rice was planted at the same time.
Keywords:main rice yield area  phosphorus  soil water  loss potential  Northern Zhejiang
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《环境科学》浏览原始摘要信息
点击此处可从《环境科学》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号