摘要
本文研究了乙醇胺对开花期遭受中度土壤干旱胁迫的玉米生理特性及产量的影响.结果表明,乙醇胺可增加干旱下叶片的气孔阻力,降低蒸腾速率,维持叶片较高的相对合水量和水势,降低叶片细胞的膜脂过氧化水平和质膜透性,提高叶片叶绿素a、叶绿素b的含量及二者的比值和类胡萝卜素含量,延缓植株叶面积的衰减,提高叶片的净光合速率,从而促进植株雄穗的发育和物质生产,增加穗有效粒数、百粒重和经济系数,使玉米的籽粒产量和品种的抗旱系数分别比干旱下喷水处理增加18.11%和17.35%.
Effects of ethanolamine on physiological characters and yield of maize under moderate soil drought at flowing stage were investigated. The results showed that after spaying ethanolamine under soil drought, the stomatal resistance of leaves increased, the transpiration rate of leaves decreased, and higher leaf relative water contents and water potential were maintaned, the level of lipid peroxidation in leaf cell membrane and relative electrical conductivity decreased and the contents of chlorophyll a, chlorophyll b and carotin of leaves, and the ratio of chlorophyll a to chlorophyll b increased, the decline of plant leaf area was delayed and the net photosynthetic rate increased. As a result, the ear development and dry matter productivity were promoted, and the available grain number per ear, 100-grain weight and economical coefficient increased. Com-pared with the water spraying treatment under soil drought, the grain yield and drought-resistant coefficient increased by 18.11% and 17.35% respectively.
出处
《作物学报》
CAS
CSCD
北大核心
1995年第4期424-428,共5页
Acta Agronomica Sinica
基金
本研究为农业部八.五期间重点课题
关键词
玉米
土壤干旱
乙醇胺
生理特性
产量
Maize
Soil drought
Ethanolamine
Physiological characters
Yield
