| 土壤水分影响生菜生长和Cd吸收初步研究 |
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| 引用本文： | 唐明灯,艾绍英,杨少海,李盟军,王艳红,罗英健.土壤水分影响生菜生长和Cd吸收初步研究[J].广东农业科学,2012,39(11):69-71. |
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| 作者姓名： | 唐明灯 艾绍英 杨少海 李盟军 王艳红 罗英健 |
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| 作者单位： | 广东省农科院土壤肥料研究所/广东省养分资源循环利用与耕地保育重点实验室/农业部南方植物营养与肥料重点实验室,广东广州,510640 |
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| 基金项目： | 广东省科技重大专项，广东省农业领域重点专项，广东省社会发展项目 |
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| 摘 要： | 通过盆栽试验研究了土壤不同水分处理对生菜生物量和Cd含量的影响。结果表明,土壤持水量显著影响生菜的生物量,影响生菜地上部和根的Cd含量,且生菜地上部(或根)Cd含量与土壤持水量呈显著负相关,其中土壤持水量从45%提高到75%,生菜地上部Cd含量降低33%;生菜地上部(或根)Cd含量与土壤乙酸铵-Cd含量呈显著正相关,但不同处理生菜地上部Cd含量显著差异不是由土壤乙酸铵-Cd的变化引起的,而是由土壤含水量处理不同造成的。因此,中轻度重金属污染土壤上的叶菜,可以通过调节土壤水分来调控其可食部分中的Cd含量。
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| 关 键 词： | 持水量 生菜 镉 土壤 |
Preliminary study for effects of soil moisture on the growth and Cd uptake of lettuce |
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| TANG Ming-deng
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AI Shao-ying
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YANG Shao-hai
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LI Meng-jun
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WANG Yan-hong
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LUO Ying-jian.Preliminary study for effects of soil moisture on the growth and Cd uptake of lettuce[J].Guangdong Agricultural Sciences,2012,39(11):69-71. |
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| Authors: | TANG Ming-deng AI Shao-ying YANG Shao-hai LI Meng-jun WANG Yan-hong LUO Ying-jian |
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| Institution: | (Institute of Soil and Fertilizer,Guangdong Academy of Agricultural Sciences/Guangdong Key Lab of Nutrient Cycling and Farmland Conservation/Key Laboratory of Plant Nutrition and Fertilizer in South Region,Ministry of Agriculture,Guangzhou 510640,China) |
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| Abstract: | A pot experiment was conducted to investigate effects of different percent water holding capacity(WHC) in soil on the fresh biomass and Cd concentration of lettuce,pH and NH4OAc extractable Cd concentration of soil.The results showed that soil moisture affected significantly(P<0.05) biomass,shoot and root Cd concentrations of lettuce,what’s more,there was a significantly negative relationship between shoot or root Cd concentration and soil moisture,a markedly positive relationship between shoot(or root) Cd concentration and NH4OAc extractable Cd concentration of soil.Shoot Cd concentration decreased 33% while soil moisture increased from 45%WHC up to 75%WHC.Soil moisture did not affect soil pH significantly.The significant difference of Cd concentration in lettuce shoot under the treatment of soil moisture was not caused by the difference of soil NH4OAc extractable Cd concentration,but by that of soil moisture level.Therefore,it is a green and environment-friendly measure for the control of Cd concentration in edible part of leafy vegetable growing in the vegetative soil moderately or slightly contaminated by cadmium to adjust soil moisture. |
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| Keywords: | water holding capacity lettuce Cadmium: soil |
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