【摘要】 在甘肃秦王川灌区通过大田试验研究了苗期调亏灌溉对蚕豆需水规律和水分生产效率的影响。结果表明:调亏处理蚕豆在苗期、拔节期及花荚期需水量减少,叶面积、蒸腾速率和光合速率下降,在鼓粒成熟期则相对增加,作物的总需水量减少。叶面积、蒸腾速率和棵间蒸发减少是调亏灌溉需水量降低的主要原因。调亏灌溉能够延缓鼓粒期叶片衰老,提高光合速率,使光合同化物向籽粒分配的比例增加,提高水分生产效率。更多还原

【Abstract】 The influence of regulated deficit irrigation(RDI) in seedling stage on water consumption rule and water use efficiency of broad bean was studied through the field experiment conducted in Qinwangchuan Irrigation district of Gansu Province.The results indicated that the water consumption quantity,transpiration and photosynthesis rate decreased in seedling stage,jointing stage and flowering stage,but increased in mature stage under RDI.The total water consumption decreased mainly because of the reduction of leaf area,transpiration and soil evaporation.RDI could suspend leaf senescence and increase photosynthesis rate in the mature stage,so photosynthesis products distributed to grain tended to increase and the WUE was higher under RDI.更多还原