摘要
以玉米杂交种科河28为试材在武威进行了干旱胁迫对大田玉米生长发育、生理特性及光合特性的影响试验。结果表明:长期干旱胁迫使玉米叶片卷曲,叶面积减少,株高下降,单株叶片数和干物质积累量减少,果穗体积减小,穗粒重和百粒重降低,大幅减产,在极度干旱条件下几乎颗粒无收;同时干旱胁迫使气孔导度减小,气孔关闭,光合能力降低,净光合速率显著下降,植株生长受到抑制。
Using corn hybrid Kehe 28 as material, the effects of drought stress on growth, development, physiological and biochemical characters and photosynthetic characteristics of corn in field were studied in Wuwei City. The results showed that long - term drought stress made corn leaf curl, reduced the leaf area, decreased the plant height, reduced the number of leaves per plant and dry matter accumulation, decreased the ear volume, declined the grain weight per spike and hundred grain weight, and the yield decreased sharply and almost total crop failure under extreme drought conditions. Drought stress also decreased the stomatal con- ductance, made stoma close, declined photosynthetic capacity and net photosynthetic rate, and inhibited the plant growth.
出处
《山东农业科学》
2014年第9期46-48,68,共4页
Shandong Agricultural Sciences
基金
国家自然科学基金项目"半干旱区作物干旱致灾过程特征及其若干阈值研究"
科技部行业(气象)专项"农田土壤水分利用效率对气候变化的响应及适应技术"(GYHY201106029)
甘肃省气象局气象科研项目:基于作物系数法的春小麦干旱指标体系建立(编号:2012-15)
中国气象局兰州干旱气象研究所科研项目:黄土高原农田蒸散空间变异特征及其环境影响(编号:KYS2012BSKY01)
关键词
干旱胁迫
玉米
生物量
产量
光合特性
Drought stress
Corn
Biomass
Yield
Photosynthetic characteristics
