不同灌溉方式对寒地水稻生长发育的影响

Effect of Different Irrigation on Growth and Development in Cold Region

随着水稻不断生长发育，其需水量也在不断变化，不同的灌溉方式直接影响到水稻中后期的生长发育。通过试验可确定灌溉的雏模式为：分蘖始期进行浅水（3～0cm）灌溉；有效分蘖期可进行浅湿交替灌溉；分蘖末期进行落干晒田，以培育水稻后期健壮的根系；孕穗期和抽穗开花期应保持3cm左右水层，能提高分蘖成穗率，保证枝梗和颖花的正常发育，促进穗大粒饱，达到优质、高产的目的。

Rice water requirement changes with its growth. The different irrigation affected the rice growth in the middle and late period immediately. The model of irrigation could be determined from this experiment：taking shallow irrigation（0-3 cm） at the beginning of tillering,taking shallow-wet alternating irrigation at the active tellering period,and taking field dry at the end of tellering to make the rice root strong. The water level should be kept at 3 cm about. That will lead to a high spike rate of tiller,a normal development of branch and spikclet,a big and plump panicle. So that it will take a high quality and yield.