| 镉胁迫下2种钾肥对油麦菜品质及土壤的影响 |
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| 引用本文： | 王艳红,李盟军,艾绍英,姚建武,余丹妮.镉胁迫下2种钾肥对油麦菜品质及土壤的影响[J].华南农业大学学报,2012,33(3):316-320. |
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| 作者姓名： | 王艳红 李盟军 艾绍英 姚建武 余丹妮 |
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| 作者单位： | 广东省农业科学院土壤肥料研究所,广东省养分资源循环利用与耕地保育重点实验室,广东广州510640 |
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| 基金项目： | 广东省社会发展项目，广东省农业领域重点专项 |
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| 摘 要： | 采用盆栽试验,研究了Cd胁迫下不同用量的K2SO4和KCl对油麦菜Lactuca sativa L.品质及土壤的影响.结果表明:Cd胁迫下,适量的K2SO4可提高油麦菜产量,降低可食部分Cd含量,同时油麦菜的硝酸盐含量显著增加,营养品质有所降低;而KCl则表现出相反的趋势.随着钾用量水平的提高,K2SO4和KCl均提高了土壤速效K含量,K2SO4对碱解N和有效P含量影响不显著;在施钾(K2O)水平为400 mg/kg时,2种钾肥处理的土壤pH较不施钾处理有显著降低,土壤DTPA-Cd含量则明显增加.总体上看,在降低油麦菜可食部分Cd含量方面K2SO4优于KCl,提高油麦菜营养品质方面则KCl优于K2SO4,但KCl增加土壤DTPA-Cd含量的风险亦大于K2SO4.
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| 关 键 词： | 镉胁迫 钾肥 油麦菜 营养品质 土壤 |
| 收稿时间： | 2011/12/1 0:00:00 |
Effect of K2SO4 and KCl on Lactuca sativa Quality and Soil Under Cadmium Stress |
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| WANG Yan-hong,LI Meng-jun,AI Shao-ying,YAO Jian-wu and YU Dan-ni.Effect of K2SO4 and KCl on Lactuca sativa Quality and Soil Under Cadmium Stress[J].Journal of South China Agricultural University,2012,33(3):316-320. |
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| Authors: | WANG Yan-hong LI Meng-jun AI Shao-ying YAO Jian-wu and YU Dan-ni |
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| Institution: | Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences,;Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences,;Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences,;Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences,;Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Soil and Fertilizer Institute, Guangdong Academy of Agricultural Sciences, |
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| Abstract: | A pot experiment was conducted to study the influence of different doses of potassium fertilizers (K2SO4 and KCl) on lettuce, Lactuca sativa, quality and soil under Cd stress. The results showed that application of proper dose of K2SO4 could increase the fresh mass of lettuce and decrease Cd content of lettuce shoots, while nitrate contents increased significantly and the nutrient quality decreased at the same time. KCl showed the opposite tendency. Soil available K increased with doses of K2SO4 and KCl increasing, and K2SO4 had no obvious influence on soil available N and P. At the application level of 400 mg·kg-1, K2SO4 and KCl both decreased soil pH and increased soil DTPA-Cd contents. Basically, K2SO4 had better effects on decreasing shoot Cd contents of lettuce than KCl, while KCl had better effects on improving nutritional quality of lettuce than K2SO4 and a higher risk of increasing DTPA-Cd contents in soil than K2SO4 at the same time. |
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| Keywords: | Cd stress potassium fertilizer Lactuca sativa nutritional quality soil |
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