摘要
针对盐渍化地区水、盐对作物的机理影响,采用田间小区试验研究了在盐渍化地区油料向日葵叶水势的影响因素及叶水势的时空变化规律。结果表明,盐渍化地区油料向日葵叶水势的主要影响因子包括净辐射、大气温度、大气湿度、土壤盐分和土壤水分。叶水势与净辐射呈抛物线关系,与大气温度、大气湿度呈线性关系。随生育进程叶水势有减小的趋势。叶水势随大气条件的变化而出现明显的日变化规律,且日变幅较大。土壤水分对叶水势的影响较土壤盐分的大。
Aiming to influence of soil water and salt on plant mechanics in salinization distribution, tield experiment are conducted to study influencing factor and regular of temporal and spatial variation of sunflower＇s leaf water potential. The result shows that the key influencing factors of sunflower＇s leaf water potential include net radiation, atmospheric temperature, atmospheric humidity, soil salt and soil moisture in salinization distribution. There is a parabolic relation between leaf water potential and net radiation, linear relation between leaf water potential and atmospheric temperature, linear relation between leaf water potential and atmospheric humidity, with growth stage, leaf water potential reduces, leaf water potential has obvious daily variation with changes of atmospheric conditions, and the daily leaf water potential changes violently. The effect of soil moisture to the leaf water potential is greater than soil salt. The study offers reliable rationale to research of saved irrigation in salinization distribution.
出处
《灌溉排水学报》
CSCD
北大核心
2005年第4期15-18,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金(50269002)
