摘要
通过玉米单阶段和双阶段干旱及复水处理的小区试验研究证明,补偿效应是作物生长发育中存在的一种生存本能,其表现有产量、生长和生理等方面,苗期旱后的拔节期复水存在生长超补偿效应和较大产量补偿效应,其生理补偿效应可持续到抽雄期;抽雄期干旱的产量和水分利用效率明显降低,苗期、拔节期连续干旱则产量最低。
In order to understand compensatory effect of corn at different growth stages to water deficit changes, the experiment was conducted in field plots. The results showed that compensatory effect is a fundmental capacity in crop life,which can be expressed in three types:yield,growth and physiological action. Under drought at seedling stage and water-recovering at jointing stage,there is a super compensatory effect on plant growth,great yield ef-fect,and physiological effect until tasseling stage of corn. The yield and water use efficiency decrease markedly un-der drought at tasseling stage,and the yield is the lowest under drought at seedling and jointing stages.
出处
《中国生态农业学报》
CAS
CSCD
2001年第3期61-63,共3页
Chinese Journal of Eco-Agriculture
基金
国家重点基础研究(973)项目(G19990117)
陕西省自然科学基金共同资助
关键词
干湿变化
生育阶段
玉米
补偿效应
Water deficit change,Growth stage ,Corn,Compensatory effect