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首页> 外文期刊>Soil Science and Plant Nutrition >Current situation of cadmium-polluted paddy soil, rice and soybean in the Mae Sot District, Tak Province, Thailand.
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Current situation of cadmium-polluted paddy soil, rice and soybean in the Mae Sot District, Tak Province, Thailand.

机译：泰国来兴府湄索地区镉污染的稻田，水稻和大豆的现状。

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Since 2002, a joint research team from the International Water Management Institute and the Department of Agriculture, Thai Government, has reported that there are cadmium (Cd)-contaminated paddy fields in northern Thailand. We evaluated the current situation of the Cd-polluted paddy fields in this report. Home-consumed rice grains were collected from all 23 households in the village of Pha Te, Mae Sot District of Tak Province, Thailand. The Cd concentration in unhusked rice (Oryza sativa L.) grains ranged from 0.04 to 1.75 mg Cd kg-1, and the rice of more than half of the households contained Cd levels higher than the critical level of 0.4 mg Cd kg-1 polished rice, which is CODEX standard. Among the paddy fields, we selected one plot (1.2 ha) and analyzed Cd concentrations of the soil, and rice and soybean (Glycine max L.) grains. In this area, a rotation cropping system of wet-season rice and dry-season soybean is common practice. The soil Cd concentration ranged from 0.31 to 13.9 mg Cd kg-1 (total Cd) and 0.030 to 13.3 mg Cd kg-1 [extracted with 0.1 M hydrochloric acid (HCl)], the Cd concentration in the rice grains ranged from 0.12 to 1.27 mg Cd kg-1, and that in the soybean grains ranged from 0.07 to 0.80 mg Cd kg-1. The soil extractable Cd concentration was well reflected in the soybean grain Cd levels (r2=0.581), but not in the rice grain levels (r2=0.015), suggesting that rice grain Cd levels are influenced not only by the soil Cd concentration, but by other factors as well, such as soil water regime and soil pH. However, a significant difference in the grain-Cd concentration was found; that is, lower Cd in the cultivar "Khao' Khaeng" and higher in the "Khao Dawk Mali 105", which suggests a possibility of selecting a rice cultivar having low-grain Cd.
机译：自2002年以来，国际水管理研究所和泰国政府农业部的联合研究小组报告说，泰国北部有被镉污染的稻田。在本报告中，我们评估了镉污染的稻田的现状。从泰国来兴府湄索县Pha Te村的所有23户家庭中收集了家庭食用的米粒。未脱壳水稻（ L.）籽粒中的Cd浓度范围为0.04至1.75 mg Cd kg -1 ，一半以上家庭的大米中都含有Cd。其含量高于CODEX标准的0.4 mg Cd kg -1 精米的临界水平。在稻田中，我们选择了一块土地（1.2公顷），并分析了土壤，水稻和大豆（大豆）中的镉浓度。在该地区，湿稻和旱季大豆的轮作制度是常见的做法。土壤Cd浓度范围为0.31至13.9 mg Cd kg -1 （总Cd）和0.030至13.3 mg Cd kg -1 [用0.1 M盐酸（HCl ）]，水稻籽粒中Cd的浓度范围为0.12至1.27 mg Cd kg -1 ，大豆籽粒中Cd的浓度范围为0.07至0.80 mg Cd kg -1 。土壤可提取的镉浓度很好地反映在大豆籽粒中的镉含量（r 2 = 0.581）上，而不反映在水稻籽粒中的镉含量（r 2 = 0.015）上，表明水稻籽粒中镉的含量不仅受土壤镉含量的影响，还受其他因素的影响，例如土壤水分状况和土壤pH值。但是，发现Cd的浓度存在显着差异。也就是说，在“ Khao'Khaeng”品种中的Cd较低，而在“ Khao Dawk Mali 105”品种中的Cd较高，这表明选择具有低粒Cd的水稻品种的可能性。

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