【摘要】 根据双季晚稻灌溉试验资料,分析了控制灌溉和浅水灌溉条件下水稻叶片净光合速率的日变化、日光合产物积累量以及全生育期净光合速率变化规律。结果表明:控制灌溉条件并未影响水稻叶片的光合性能,净光合速率峰值没有下降,主要生育期内日光合物质积累与浅水灌溉基本持平。控制灌溉土壤水分指标满足水稻的生理需水,从作物光合角度说明了水稻控制灌溉技术的节水高产的科学性。更多还原

【Abstract】 Diurnal change and variation in the whole growing season of net photosynthesis rate and diurnal photosynthetic production accumulation were analyzed,based on the experimentation of control irrigation on late rice.Results reveal soil water in controlled irrigation does not affect photosynthetic characteristics of the rice leaf: the maximal net photosynthesis rate is not declined and diurnal photosynthetic production accumulation has the same level as in low water irritation in the main growing season.The soil water index is adequate for the need of rice physiological water and scientific high production in addition to saving water of controlled irrigation is expounded from the view of crop photosynthesis.更多还原