强化栽培条件下干湿灌溉对水稻生长的影响

在中国水稻研究所试验场研究了强化栽培条件下干湿灌溉对水稻生长的影响.结果表明:在强化栽培条件下采取干湿灌溉处理,在返青期、分蘖期、孕穗期和抽穗开花期比对照分别节水1.4%、12.4%、9.0%和11.2%;水分生产效率达0.93 kg/m3,比CK处理提高34.2%;干4～5 d之后,再复水4～5 d,土壤氧化还原电位循环变化,有利于提高土壤氧化还原电位,改善土壤的通气状况,提高根系活力,促进大穗,穗粒致明显增加,单产平均提高6.9%.

Effects of dry and wet irrigation on the growth of rice under system of rice intensification

Effects of aerobic irrigation on the rice growth were conducted in the experimental station of China National Rice Research Institute under system of rice intensification.The result showed that: it saved water by 1.4%,12.4%,9.0% and 11.2% at returning green stage,tillering stage,booting stage and heading stage respectively,and the water use efficiency was 0.93 kg/m3,34.2% higher than that of the control;soil redox potential(Eh) changed circularly and advanced after drying 4 to 5 days,and rewatering 4 to 5 days;and the conditions of soil aerating and root activity were improved,furthermore,it promoted big panicle,and increased the grain yield of rice by 6.9%.