几种化学药剂处理对蔬菜劣变种子生活力的影响

用ＧＡ３（赤霉素），硫脲，ＮＫＯ３，Ｈ２Ｏ２不同浓度或不同时间浸泡处理菠菜、茼 、芫荽劣变种子，结果表明，ＧＡ３对３种种子的萌发没有明显促进作用，且过高的浓度会抑制种子萌发；０．２％有硫脲对菠菜、芫荽种子萌发效果较好，发芽率分别比对照提高２３％和３０％，茼蒿以０．５％的浓度为适宜，发芽率比对照提高３１％；ＫＮＯ３处理３种种子均以０．２％效果最好，菠菜、茼蒿、芫荽的发芽率分别比对照提高２４％，１２％，１４％；Ｈ２Ｏ２处理只对菠菜种子有效，浸泡５，１０ｍｉｎ，发芽率分别提高１８％，２０％。发芽势也有所提高。测定浸出液电导率、紫外吸收表明，各有效处理相对电导率及紫外吸收均比处理低，表明化学药剂处理种子均导致无机离子和核酸、蛋白质等有机和的渗出减少。说明药剂处理种子对细胞膜系统具有一定的保护和修复作用。

Effect of Several Chemicals on the Germination Percentage of Vegetable Seeds

The seeds of Spinacea oleracea,Chrysandthemum coronvium,Coriandrum satium were treated with GA 3,Thiourea,KNO 3 and H 2O 2 at various concentrations respectively.The results showed that GA 3 slightly promoted at low concentration or inhibited at high concentration the germination of three seeds,in contrast,the germination of three kind of seeds was promoted by using Thiourea solution with optimal concentration of 0.2% for spinacea oleracea and coriandrum satium,0.5% for coriandrum satium KNO 3 with 0.2% concentration had the best effect for three kind of seeds,but 30% H 2O 2 only had primitive effective for spinacea oleracea.Treatment with KNO 3 Thiourea reduced electrolytes and UV absorbent substances leaked from the effective treated seed,which suggested that Thiourea,KNO 3 can keep the stability of cell membrane.