不同叶面肥对番茄幼苗生长、干物质积累及耐旱性的影响

以硬果80番茄为试验材料,研究了质量浓度为3 g/L的磷酸二氢钾、葡萄糖以及氯化钙叶面肥料(清水为对照)处理对其株高、株幅、干物质总质量以及耐旱性的影响。结果表明:随着处理时间的延长,3个处理番茄幼苗的株高、株幅和干物质总质量均有不同程度增加,其中磷酸二氢钾处理增幅最大,分别增加8.0%、6.1%、8.0%。随着干旱胁迫时间的延长,3个处理番茄幼苗叶片的电解质相对渗透率均逐渐增加,在干旱处理结束时,叶片电解质相对渗透率由低到高的顺序依次为:磷酸二氢钾处理<葡萄糖处理<氯化钙处理<清水对照。综合分析同质量浓度的磷酸二氢钾、葡萄糖和氯化钙对幼苗期番茄进行叶面施肥处理效果,以磷酸二氢钾的效果最佳。

Responses of Growth, Dry Matter Accumulation and Drought Tolerance of Tomato Seedlings to Different Foliar Fertilizers Treatment

In this paper,the effects of 3 types of foliar fertilizers——3g/L KH2PO4,3g/L glucose and 3g/L CaCl2(water control) on plant height,crown width,plant dry weight and drought tolerance of tomato(Lycopersicon esculentum Mill cv."Yingguo 80") seedlings were investigated under greenhouse conditions.The results showed that plant height,crown width and plant dry weight of tomato seedlings treated with KH2PO4,glucose and CaCl2 were all increased by some extent with the treatment time prolonging.The best treatment effect was that of which was treated by KH2PO4 among all the tomato seedlings.Compared with control,the plant height,crown width and plant dry weight of tomato seedlings treated by KH2PO4 increased by 8.0%,6.1%,and 8.0%,respectively.The electrolyte relative leakage rates of tomato seedlings treated by 3 types of foliar fertilizers were gradually increased with time prolonging of drought tolerance;at the termination of drought tolerance,the order of the electrolyte relative leakage rates from low to high was:KH2PO4