不同改良剂在镉与硝酸盐复合污染下对辣椒品质的影响

通过盆栽和大田试验,研究了氮镉交互作用下不同改良剂(有机肥、双氰胺和石灰)对辣椒品质的影响.结果表明:在试验范围内,有机肥处理与对照相比均显著提高了辣椒中千物质和叶绿素的含量；3种改良剂的施用均降低了辣椒中Vc、可溶性糖、可溶性蛋白以及镉与硝酸盐的含量,对Vc的影响是对照＞石灰＞有机肥＞双氰胺,但是盆栽中石灰、有机肥与对照间差异不显著；对可溶性蛋白来说:对照＞双氰胺＞石灰＞有机肥,但盆栽中双氰胺、石灰处理间差异不显著,大田中3种改良剂处理间差异均不显著；对于可溶性糖来说:对照＞有机肥＞双氰胺＞石灰,但在大田中双氰胺、有机肥处理间差异不显著；有机肥、石灰、双氰胺处理与对照相比,盆栽和大田中辣椒镉的累积量分别降低5.37％、30.99％、35.95％和52.75％、84.62％、86.26％；双氰胺、有机肥、石灰处理与对照相比,盆栽和大田中硝酸盐的累积量分别降低21.78％、31.37％、35.90％和12.67％、25.51％、34.68％.

Effects of Several Modifiers on Quality of Pepper in Interactive of Nitrogen Nutrition and Cadmium Contamination Soil

The effect of different modifiers on the pepper quaility under interaction of nitrogen nutrition and cadmium contamination was studied by a pot and field experiment.The results showed that organic fertilizers could raise the content of the dry matter and chlorophyll in pepper.3 modifiers significantly decreased the content of Vc,soluble sugar,soluble protein,Cd and nitrate.The sequence of the effect on Vc was CK>lime>organic fertilizers >dicyandiamide,but the differences of lime,organic fertilizer and contr...