Metal Contamination in Nullah Dek Water and Accumulation in Rice

M. SARFRAZ; S. M. MEHDI; G. HASSAN; S. T. ABBAS

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Metal Contamination in Nullah Dek Water and Accumulation in Rice

机译：水质明渠水中的金属污染和水稻中的积累

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A research study was carried out to determine the electrical conductivity (EC), residual sodium carbonate (RSC), sodium adsorption ratio (SAR), pH and metals in metal-polluted irrigation water from a nullah and those in soils over a period of time, and the effect of metals on rice yield and metal concentrations in rice grain and straw. Two sites (Ⅰ and Ⅱ) were selected on the bank of Nullah Dek at Thatta Wasiran in Sheikhupura District (Pakistan), with two rice varieties, Super Basmati and Basmati 385, at both sites. Water samples were collected during rice crop growth at 15-day intervals from August 3 to November 1, 2002. The results showed that Nullah Dek water had an EC ＞1.0 dS m-1 and RSC of 2.78-4.11 mmolc L-1, which was hazardous for crops, but the SAR was within the safe limit. Cu, Mn Cd and Sr were also within safe limits. The soil analysis showed that Site Ⅱ was free from salinity/sodicity, whereas Site Ⅰ was saline sodic. Among metals, Zn was sometimes deficient, Cu, Mn and Fe were adequate, and Sr, Ni and Cd were within safe limits in the soil at both the sites. After the rice crop harvest, concentrations of all metals tested were usually slightly increased, being higher in the upper soil layer than the lower. In addition, Basmati 385 produced higher rice grain and straw yield than Super Basmati. Chemical analysis of rice grain indicated the presence of Zn, Cu, Fe, Mn, Pb and Sr, whereas rice straw contained Zn, Cu, Fe, Mn and Sr, with Cd and Ni both being found in minute quantities.

机译：进行了一项研究，以确定一段时间内来自明渠的金属污染灌溉水中的电导率（EC），残留碳酸钠（RSC），钠吸附率（SAR），pH和金属以及土壤中的金属，以及金属对水稻产量和稻米和稻草中金属浓度的影响。在巴基斯坦Sheikhupura区Thatta Wasiran的Nullah Dek河岸选择了两个地点（Ⅰ和Ⅱ），两个地点都有两个水稻品种，Super Basmati和Basmati 385。从2002年8月3日至11月1日，每隔15天收集水稻作物生长期间的水样。结果表明，明渠水的EC＞ 1.0 dS m-1，RSC为2.78-4.11 mmolc L-1。对作物有害，但SAR处于安全范围内。 Cu，Mn Cd和Sr也在安全范围内。土壤分析表明，SiteⅡ无盐度/盐度，而SiteⅠ为盐碱。在金属中，两个地点的土壤中有时锌不足，铜，锰和铁充足，而锶，镍和镉的含量在安全范围内。水稻收成后，所有测试金属的浓度通常会略有增加，在上层土壤层中高于下层土壤。此外，印度香米385的稻谷和稻草产量比超级印度香米高。稻米的化学分析表明存在Zn，Cu，Fe，Mn，Pb和Sr，而稻草中含有Zn，Cu，Fe，Mn和Sr，其中Cd和Ni的含量均很少。

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《土壤圈（英文版）》 |2007年第1期|130-136|共7页
作者
M. SARFRAZ; S. M. MEHDI; G. HASSAN; S. T. ABBAS;
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作者单位

plant Nutrition Division, Soil Salinity Research Institute, Pindi Bhattian (Pakistan);

plant Nutrition Division, Soil Salinity Research Institute, Pindi Bhattian (Pakistan);

plant Nutrition Division, Soil Salinity Research Institute, Pindi Bhattian (Pakistan);

Crop Sciences Institute, National Agricultural Research Centre (NARC), Islamabad (Pakistan);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
contaminated water; metal accumulation; rice; salinity and sodicity;

机译：污水;金属积累;水稻;盐度和碱度;

Metal Contamination in Nullah Dek Water and Accumulation in Rice

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