吹风对大豆幼苗生长和叶片生理特性的影响

研究了光照培养箱内大豆植株在吹风条件下的形态特性和某些生理特性的变化。结果表明:吹风改变了光照培养箱内的微环境,使空气温度下降2℃,相对湿度下降6%,CO2浓度增加5μmol.mol-1;吹风使大豆植株株高和各部分干重下降,根冠比增加,抗倒伏能力增强,与对照植株相比差异均达极显著水平;同时吹风处理的大豆叶片长度、叶片宽度以及小叶面积均减少,使单株叶面积下降,但叶片的叶绿素含量、可溶性蛋白含量、比叶重均增加,其差异均达极显著水平,可溶性糖含量显著低于对照植株;叶片MDA含量增加,保护酶活性显著增强。吹风改变了植株的生长微环境,导致大豆植株生长受阻和生理特性发生变化,但茎粗增加,抗倒伏能力增强,表明吹风对矮化生长,培育壮苗有一定的生产实践意义。

Effects of Blowing on Growth and Leaf Physiological Characteristics of Soybean Seedlings

The effects of blowing on the growth traits and some physiological characteristics of soybean seedings were studied under the condition of the illumination incubator.The micro environment of illumination incubator was changed by blowing,the temperature decreased 2℃,the relative humidity decreased 6%,while CO_2 concentration increased 5 μmol · moL~(-1).Blowing significantly decreased plant height and dry weights,while significantly increased root-shoot ratio and lodging resistance;Blowing significantly decreased leaf length,leaf width,leaflet area as well as soluble sugar content,while significantly increased chlorophyll content,soluble protein content,specific leaf weight and MDA content in leaf.Results suggest blowing can change the growth environment of soybean,enhance the protective enzyme activity and lodging resistance,hence,blowing is helpful in cultivation of stunted soybean seedlings.