矮壮素对小白菜高温半致死温度及耐热性的影响-《中国瓜菜》(2021年1期).docx

龙源版权所有 矮壮素对小白菜高温半致死温度及耐热性的影响作者：李进来源：《中国瓜菜》2021年第01期 摘 要：为研究不同浓度矮壮素对小白菜高温半致死温度及耐热性的效果，用100～600 mg·L-1矮壮素并以清水作对照，喷施小白菜叶片。以叶片为试验材料，用35～70 ℃的高温处理，根据相对电导率配合Logistic方程，求得半致死温度（LT50），同时测定田间高温热害指数。结果表明，6个矮壮素及清水（CK）处理的半致死温度（LT50）分别为43.52、44.49、45.53、44.33、42.88、42.31、43.36 ℃，高温热害指数为48.53%、42.35%、40.21%、40.84%、53.89%、61.26%、55.68%，适当浓度的矮壮素可提高小白菜耐热性。综上所述，300 mg·L-1矮壮素对提高小白菜半致死温度及耐热性效果最好，操作简单、便捷、成本低。 关键词：小白菜;矮壮素;相对电导率;半致死温度;耐热性 中图分类号：S634.3 文献标志码：A 文章编号：1673-2871（2021）01-069-03 Effect of chlormequat chloride on high temperature semi-lethal temperature and heat resistance of Chinese cabbage LI Jin （Nantong College of Science and Technology， Nantong 226007， Jiangsu， China） Abstract： In order to study the effects of different concentrations of chlormequat chloride on the high temperature semi-lethal temperature and heat resistance of Chinese cabbage， 100 ～ 600 mg·L-1 Chlormequat chloride was sprayed on the leaves of Chinese cabbage with clear water. The semi-lethal temperature （LT50） was obtained according to the relative conductance and Logistic equation. Meanwhile， the thermal damage index of high temperature in the field was determined. The results showed that the semi-lethal temperature （LT50） was 43.52， 44.49， 45.53， 44.33， 42.88， 42.31， 43.36 ℃， and the heat damage index was 48.53%， 42.35%， 40.21%， 40.84%， 53.89%，61.26%，55.68%. All things considered，when the concentration of chlormequat chloride was 300 mg·L-1， the effect of increasing the semi-lethal temperature and heat resistance of Chinese cabbage was the best， the operation was simple， convenient and the cost was low. Key words： Chinese cabbage; Chlormequat chloride; Relative conductivity; Half lethal temperature; Heat resistance 小白菜又名青菜···试读结束