CAJ | 학술논문

选用Ⅱ优623和天优3301品种,定株定蘖观察不同节位再生分蘖的抽穗期和经济性状。结果表明,分蘖抽穗期随节位下移而推迟,每低一节平均推迟2～3 d,二次分蘖抽穗期比其母茎平均推迟12～14 d;分蘖萌发成穗率和结实率也随节位下移而降低;每穗粒数和千粒重以倒3分蘖最多,倒2分蘖次之,倒4、5分蘖再次之,二次分蘖显著减少;在头季成熟时高桩手割条件下,倒2、3分蘖合占再生季70%的穗数、80%的产量。研究结果为诊断各节位再生分蘖的生育进程和掌握调控时机提供了科学依据。
선용Ⅱ우623화천우3301품충,정주정얼관찰불동절위재생분얼적추수기화경제성상。결과표명,분얼추수기수절위하이이추지,매저일절평균추지2～3 d,이차분얼추수기비기모경평균추지12～14 d;분얼맹발성수솔화결실솔야수절위하이이강저;매수립수화천립중이도3분얼최다,도2분얼차지,도4、5분얼재차지,이차분얼현저감소;재두계성숙시고장수할조건하,도2、3분얼합점재생계70%적수수、80%적산량。연구결과위진단각절위재생분얼적생육진정화장악조공시궤제공료과학의거。
In the present work,we studied the heading stage of regenerated tillers from different nodes and its economic character of II You 263 and Tianyou 3301.Results,the lower the nodes located,the later heading stage of tiller started.The tiller heading stage of lower nodes delayed 2-3 days compared to that of nodes which just upper side;the second tiller heading stage delayed 12 ~ 14 days compared to that of the main stem;lower tillers spike rate and ripening rate were also decreased;the number of grains per panicle and thousand-grain weight of the inversed third tillers were the most,and that of the inversed second tillers were less than the inversed third tillers;the number of grains per panicle and thousand-grain weight of the inversed fourth and the inversed fifth tillers were the less than that of the inversed second tillers.The number of grains per panicle,and thousand-grain weight of the regenerated tillers were significantly decreased.Under the hand-cut condition in the first ripening season,the yields rate of inversed second and inversed third tillers accounted for 80%,and the spike number was equal to 70% of the second ripening season.The results provided a scientific basis for the diagnosis of reproductive process and decision of controlling time to the ratoon rice.