摘要
为了探讨钾肥对铅污染土壤蔬菜安全生产的影响,本试验采用温室盆栽,研究了不同钾肥对紫色菜园土壤2种铅污染条件下白菜产量、营养品质和安全品质(硝酸盐和重金属)的影响。结果表明,与不施钾肥(CK1)相比,钾肥能显著提高铅污染土壤白菜产量和根系重量,施用钾肥增产幅度为9.5%～48.4%。施用钾肥显著降低白菜游离氨基酸和维生素C含量,增加还原糖的含量。铅污染土壤上,白菜硝酸盐含量增加,施用钾肥能降低白菜硝酸盐含量,降低幅度为15.3%～54.6%。硫酸钾能显著降低铅含量,氯化钾在低铅污染条件下低量施用时,显著增加铅含量,其余处理均显著降低铅含量。
In order to explore the role of potassium fertilizer in safe vegetable production under lead pollution soils condition,a pot experiment was conducted to study the effects of different potassium fertilizers （potassium sulphate and potassium chloride） on cabbage yield,nutritional quality and safety quality （nitrate and heavy metals） in lead pollution soils.Results indicated that the yield and roots weight of cabbage were significantly increased by the fertilized treatments by 9.5%-48.4% compared to the CK1.Application of potassium fertilizer could significantly reduce amino acid and Vc content in cabbage,but increase the content of the reducing sugar in it.The nitrate content of cabbage was increased in lead contaminated soil and reduced by 15.3%-54.6% in potassium fertilizer treatments.Potassium sulphate could significantly reduce the lead content of cabbage.Lead content of cabbage was increased by the low dosage of potassium chloride and the others significantly decreased in low lead contaminated soil.
出处
《中国农学通报》
CSCD
北大核心
2011年第25期240-244,共5页
Chinese Agricultural Science Bulletin
基金
西南大学科技创新"光炯"培育项目
国际植物营养研究所(IPNI)项目(Chongqing-2009-U-2)
关键词
钾肥
铅
白菜
产量
品质
potassium fertilizer
lead
cabbage
yield
quality
