鄂南4种土壤施用氯化钾对油菜幼苗生长及养分积累的影响

用发育于Ｑ＿２和沙页岩上４种土壤，盆栽油菜，按每ｋｇ土施用０．３、０．６和０．９ｇＫ＿２Ｏ，以研究ＫＣｌ对油菜幼苗生长及养分积累的影响。结果：施用Ｋ＿２Ｏ０．３ｇ／ｋｇ和０．６ｇ／ｋｇ，４种土壤上油菜幼苗鲜、干重均较不施对照增加，但两种旱地土壤的增值小于两种水稻土。随ＫＣｌ施用量的增加，油菜幼苗地上部Ｎ、Ｐ、Ｃａ、Ｍｇ等元素的含量逐渐下降，但Ｍｎ、Ｃｌ元素的含量则逐渐增多。

EFFECTS OF POTASSIUM CHLORIDE APPLICATION TO FOUR SOILS ON GROWTH AND ELEMENT ACCUMULATION OF RAPE SEEDLINGS

Four soils derived from Q_2 and quartizite sandstone parent materials and four application rates of 0,0.3,0.6,0.9gK_2O/kg were adopted for pot culture experiment.The effects of potassium chloride application on growth and element accumulation of rape seedlings were studied. The results showed that the fresh and dry weights of rape seedlings in the four soils were all increased by application of 0.3,0.6g K2O/kg, but the increasing rates of two upland soils were lower than those of two paddy soils. Contents of N, P, Ca, Mg in rape seedlings decreased with the application rate of potassium chloride, but contents of Mn, Cl increased.