Effect of water regimes and organic matters on transport of arsenic in summer rice (Oryza sativa L.)

来源 :环境科学学报(英文版) | 被引量 : 0次 | 上传用户:szzc2001
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The arsenic contamination in soil-water-plant systems is a major concern of where, the groundwater is being contaminated with arsenic (above 0.01 mg/L) in the Indian subcontinent. The study was conducted with organic matter to find out the reducing effect on arsenic load to rice (cv. Khitish). It was observed that intermittent ponding reduced arsenic uptake (23.33% in root, 13.84% in shoot and 19.84% in leaf) at panicle initiation stage, instead of continuous ponding. A decreasing trend of arsenic accumulation (root > straw >husk > whole grain > milled grain) was observed in different plant parts at harvest. Combined applications of lathyrus + vermicompost + poultry manure reduced arsenic transport in plant parts (root, straw, husk, whole grains and milled grain) which was significantly at par (p > 0.05) with chopped rice straw (5 tons/ha ) + lathyrus green manuring (5 tons/ha) in comparison to control and corresponding soils. A significant negative correlation of arsenic with phosphorus (grain P with arsenic in different parts R2= 0.627-0.726 at p >0.01) was observed. Similarly, soil arsenic had a negative correlation with soil available phosphorus (R2 = 0.822 at p > 0.001) followed by soil nitrogen (R2= 0.762 at p > 0.01) and soil potassium (R2 = 0.626 at p > 0.01). Hence, effective management of contaminated irrigation water along with organic matter could reduce the arsenic build up to plants and soil.
其他文献
Seventeen species, one subspecies and one variety of Dioscorea sect. Stenophora Uline were investigated for their phylogenetic relationships based on a sequence
在青岛汇泉湾沿岸沉积物中发现了大量海洋趋磁细菌,最大丰度可达105 个/cm3.透射电镜观察发现该菌菌体形态多样,有球形或卵球形、长短杆状、弧状和螺旋状,其中球形或卵球形趋
在日光温室条件下研究了不同地表覆盖对黄瓜品质、水分利用效率及土壤环境的影响.结果表明:地表覆盖不仅能明显增加黄可溶性糖、Vc、可溶性蛋白、干物质含量及游离氨基酸总量
为探讨秸秆还田对土壤肥力的影响,该文以18年的定位试验为基础,通过对直接施用秸秆、有机肥以及化肥、有机肥配施等6个处理小区的土壤进行采样,分析了秸秆还田同有机肥培肥方
This study compares results on reconstructing the ancestral state of characters and ancestral areas of distribution in Cornaceae to gain insights into the impac
以代表当今国际焊接技术发展水平的2002年美国芝加哥"国际焊接展示会(Welding Show 2002)"为背景,结合最新的文献资料,介绍了当今国际钎焊领域的新技术、新方向,分析了钎焊研
Objective:To evaluate the significance of combined detection of LunX mRNA,carcinoembryonic antigen(CEA),neuron-specific enolase(NSE),and cytokeratin 21-1 fragme
雷电流幅值及其特性是雷电科学研究的重要基础数据.为此利用闪电定位系统监测到的重庆区域内地闪资料(1999~2008年),统计分析了重庆地区1999~2003年、2003~2008年正闪和负闪雷电