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Effects of soil water stress on the regular degree of plant properties of summer corn
Author(s): 
Pages: 812-817
Year: Issue:  5
Journal: ACTA BOTANICA BOREALI-OCCIDENTALIA SINICA

Keyword:  夏玉米水分胁迫整齐度;
Abstract: 利用大型防雨设施池栽,严格调控水量,研究夏玉米全程及阶段性土壤水分胁迫对植株性状整齐度的影响.结果表明,夏玉米生育全程水分胁迫,植株性状整齐度全面劣化,产量极低;苗期阶段水分胁迫导致大、小苗,壮、弱苗两极分化明显,株高整齐度显著下降,其负效应持续至生育后期,生育进程推迟,千粒重显著降低,对产量造成一定影响;穗期阶段水分胁迫对穗长、穗粒数整齐度影响明显,产量降幅较大;花粒期阶段水分胁迫对千粒重及穗粒数影响最大,产量降幅更大.超高产玉米是多种性状、高整齐度共同作用的结果.超高产栽培中,苗期阶段控水应有一个限度,土壤相对含水量不应低于60%,穗期阶段重视水分管理,花粒期阶段保证充分供水.
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