摘要
Zn是植物生长必需的微量元素,土壤中Zn含量多少影响作物的生长、产量及品质。本研究通过田间试验和室内测定,分析锌肥(ZnSO_4·7H_2O)不同施用量对大蒜产量及VC和蛋白质含量的影响,并对大蒜中18种矿质元素含量进行测定分析,探讨锌肥的最佳施用量。结果表明,适量施用锌肥,能提高大蒜产量,增加大蒜中VC和蛋白质的含量;大蒜中Zn含量随锌肥施用量的加大而增加;大蒜中Zn含量与K、P及Cd含量呈显著相关;过量施用锌肥抑制大蒜产量形成,并引起大蒜中有害重金属镉的积累。从大蒜产量、品质、矿质元素含量等方面综合考虑,本试验土壤中大蒜最佳锌肥(ZnSO_4·7H_2O)施用量为10.0 kg/hm^2。
Zinc is an essential trace element of plant,and the its zinc content in soil affects crop growth,yield and quality. In this study,the effect of different application rates of zinc fertilizer on the yield,the contents of VC,protein,and mineral elements in garlic bulbs was analyzed,and as a result,the appropriate amount of zinc was presented. Zinc fertilization improved the yield,protein and vitamin C contents in garlic. The content of zinc was positively correlated with K,P,and Cd. Over application of zinc fertilizer reduced garlic yield and resulted in the accumulation of toxic heavy metal elements( e. g. Cd). Considering the yield,quality and element content,the optimal application amount of zinc fertilizer( ZnSO_4·7H_2O) was recommended to be 10 kg / hm^2.
出处
《江苏农业学报》
CSCD
北大核心
2016年第4期891-897,共7页
Jiangsu Journal of Agricultural Sciences
基金
江苏省科技支撑项目(BE2014387)
关键词
大蒜
锌肥
产量
品质
矿质元素
garlic
zinc fertilizer
yield
quality
mineral element
