水稻分蘖期受涝特性及促控措施

Water logging Resistance Character of Rice at Tillering Stage and Accelerating and Controlling Measures

水稻分蘖期受淹(冠水)对水稻生长影响较大,不同品种耐涝性表现为常规粳稻耐涝性高于杂交中籼稻,直播稻耐涝性高于人工栽插高于机插秧,秧苗素质好的耐涝性高于秧苗素质差的。杂交籼稻在冠水8 d(粳稻10 d)内,只要管理措施运用得当,多数水稻田可以恢复生长。受涝水稻能否保苗保产,关键在于抢排积水和出水后加强管理,采用排水露田、追施氮磷钾肥和加强病虫害防治,能有效地促进涝后水稻的恢复生长。

Water logging at tillering stage has great effect on the growth of rice. Different types of rice have different water logging resistance. Conventional japonica rice has greater water logging resistance than hybrid medium indica rice, direct sowing than transplanting by hand and machine, and high quality seedlings than poor quality seedlings. Hybrid rice could recover growth after water logging in eight days （japonica rice in 10 days） if management was in time. The important measures to keep water logged rice growing well are to drain off water quickly, strengthen management after emerging, apply additional N, P, and K fertilizers and control insect pests and plant diseases.