不同灌溉条件下的水稻需水规律及水分生产率分析

Water demand regulation of rice under different irrigation conditions and its moisture production duty

稻田需水量包括植株蒸腾、棵间蒸发、田间渗漏3部分。研究表明,水稻在充分供水条件下所形成的蒸腾量中包含了一部分无效蒸腾,无效蒸腾量的减少不会影响作物的生长发育,反而会有不同程度的增产和优质效应。节水灌溉技术的推广产生了明显的经济与社会效益。结合当地实际情况采用3种常见的灌溉方式探讨了不同灌溉方式下水稻的需水规律、灌概定额和生产率的差异,为水稻节水高效栽培提供理论与技术依据。

The water demand of paddy field has three parts of plant transpiration,evaporation between plants and seepage in field. the study shows that the rice＇ transpiration quantity under the condition of rich water demand covers the reduction of unavailable transpiration and unavailable transpiration quantity, which is conductive to flee increment. Water saving irrigation technology has been spread and good economic and social benefits have been received. The water demand regulation, irrigation norm and production duty of rice under different irrigation conditions have been discussed in the paper, which provides theoretical and technical bases for water saving planting of rice.