首页|期刊导航|中国农业科学（英文版）|Effects of Application of Nitrogen, Potassium and Glycinebetaine on Alleviation of Water Stress to Summer Maize
中国农业科学（英文版）2005，Vol.4Issue(10)：767-773,7.
Effects of Application of Nitrogen, Potassium and Glycinebetaine on Alleviation of Water Stress to Summer Maize
Effects of Application of Nitrogen, Potassium and Glycinebetaine on Alleviation of Water Stress to Summer Maize
摘要
Abstract
A pot experiment was conducted under water deficit and adequate water-supplied conditions with two maize genetypic varieties (Shaandan 9 and Shaandan 911) to study the effects of nitrogen, potassium and glycinebetaine (GlyBet) on the dry matter and grain yields as well as water use efficiency (WUE). Determinations were made at different stages of the two varieties for revealing the function of these factors in increasing plant resistance to drought. Results showed that under a water-stressed condition, dry matter and grain yield were significantly reduced. However, the response of the two varieties to water stress was different: Shaandan 9 was significantly higher in dry matter and grain yields, and therefore could be regarded as a drought-resistant variety compared to Shaandan 911.Application of nitrogen, potassium and glycinebetaine raised dry matter and grain yield to different levels, and thereby alleviated the water stress and increased water use efficiency. These effects were higher for Shaandan 911 than for Shaandan 9. Under water-stressed conditions, application of N fertilizer, either at low rate or at high rate, significantly increased dry matter, grain yield and water use efficiency.A significant different effect was found for Shaandan 911 between N rates, but not so for Shaandan9. However,with supplemental water supply, effects of N fertilization were obviously decreased, showing that in addition to supplying nutrient, N fertilizer has a function in increasing drought-resistance of the crop. Potassium and glycinebetaine exhibited a remarkable function in increasing dry matter and grain yields as well as water use efficiency under water stress while such effects were obviously declined, even vanished, with supplemental water supply, indicating the important contribution of these factors in rise of drought-resistance ability of a crop.关键词
Nitrogen/Potassium/Glycinebetaine (GlyBet)/Summer maize/Water stressKey words
Nitrogen/Potassium/Glycinebetaine (GlyBet)/Summer maize/Water stress分类
农业科技引用本文复制引用
..Effects of Application of Nitrogen, Potassium and Glycinebetaine on Alleviation of Water Stress to Summer Maize[J].中国农业科学（英文版）,2005,4(10):767-773,7.基金项目
The study was supported by the key project (30230230) and general project (30070429) of National Natural Science Foundation of China (NSFC). The authors would like to take the opportunity to thank the NSFC for its kindness to support such projects. （30230230）
