摘要
为探明天然植物营养素(水溶有机肥料)对水稻生长发育、稻米品质和降镉效应的影响,通过镉超标土壤盆栽试验开展研究。结果表明:喷施天然植物营养素对水稻株高及分蘖有一定的促进作用,提高水稻对氮、钾的吸收和稻谷产量,稻草氮、钾含量分别较对照提高2.2%~5.4%和15.4%~26.4%,稻谷产量提高5.7%;显著提高稻米粗蛋白和赖氨酸含量,粗蛋白含量提高6.1%~10.9%,赖氨酸含量提高50.0%~63.6%;增加稻根镉含量,阻止镉向地上部转移,茎叶镉含量较对照降低3.7%~9.6%;稻米镉含量0.07 mg/kg,低于国家食品卫生标准(<0.2 mg/kg)。叶面喷施浓度以1∶900倍稀释液为宜。
A pot experiment using cadmium contaminated soil was conducted to study the effects of natural plant nutrients(water-solubleorganic fertilizer)on growth of rice and the quality of rice grain and the reduction of cadmium(Cd)in rice.The results showed that foliarapplication natural plant nutrients showed a positive effects on height and tillers in rice grain,but the absorption of nitrogen and potassiumin straw were increased by2.2%-5.4%and15.4%-26.4%,respectively,the yield of rice grain increased by5.7%,and crude protein andlysine in rice grain significantly increased by6.1%-10.9%and50.0%-63.6%,respectively.The Cd concentration in rice root increasedwhich prevented the transportation of Cd from root to overground part in rice.The Cd concentration in straw decreased by3.7%-9.6%,and the Cd concentration of rice grain was0.07mg/kg,which was lower than the national food and healthy standard(<0.2mg/kg).Theconcentration of foliar application1∶900times diluted natural plant nutrients is the most appropriate.
作者
向艳艳
黄运湘
刘利杉
龙泉
XIANG Yan-yan;HUANG Yun-xiang;LIU Li-shan;LONG Quan(College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PRC)
出处
《湖南农业科学》
2017年第5期36-38,共3页
Hunan Agricultural Sciences
基金
湖南省农业厅项目(2015)
关键词
植物营养素
叶面喷施
水稻
生长发育
稻米品质
降镉效应
plant nutrients
foliar application
rice
growth and development
quality of rice grain
Cd reduction
