水稻拔节期的形态生理变化与高产栽培管理

Morphological and Physiological Changes of Rice at Jointing Stage and Its high-yield Cultivation

水稻栽培上要根据拔节期的形态生理变化规律,采取相应的田间管理措施,包括根据拔节期分蘖即停止的规律,栽培上要由返青分蘖期田间管理调整为拔节抽穗期田间管理;根据拔节后水稻外部形态"三变"来决定肥水促控措施;根据拔节后分蘖向两极分化的规律,移栽后要促进早分蘖,控制临近拔节期分蘖;根据各品种幼穗分化和拔节之间的关系来确定晒田终止期等,以指导水稻高产栽培管理。

Field management of rice cultivation should be based on the morphological and physiological variation.The field management should be modulated from reviring and tillering stage to jointing and pregnancy stage as tillering ceased during jointing stage.The fertilizer promote and controling meatures should be decided according to ＂three changes＂ of rice morphology after jointing.Titter should be boosted after transplantation but restrained when it was near the jointing stage due to the polarity of tiller after jointing.The time of ending field drying should be determined by the relationship between spike viaration and jointing of different breedings so as to guide the management of rice high yield cultivation.