Nitrogen distribution characteristics of early-maturing rapeseed
Isotope 15N labeling method was used to study the intrinsic relationship between the precocious of rapeseed (Brassica napus L.) and nitrogen nutrition including N absorption,distribution and redistribution.Compared to medium-late matured cultivar Zhongshuang 11 (ZS11),early matured Zhongyou 116 (ZY116) was about 5 days and 4 days shorter in vegetative and reproductive stages respectively,and thus matured 9 days earlier than ZS11.Absorbed nitrogen in whole life of ZY116 transported more to grain than that of ZS11,and less to silique in flowering period,and more to grain in podding period.Their differences above reached significant levels.In the later period,redistribution speed of nitrogen absorbed in vegetative growth stage of ZY116 was significantly faster,with the redistribution speed of 3.22mg/d from flowering period to podding,and of 3.71mg/d from podding to harvesting,and the corresponding speeds of ZS11 were 2.48mg/d and 3.10mg/d respectively.
Early-matured rapeseedGrowth stageIsotope 15 N-labelledNitrogen distribution
国家科技期刊平台
NSTL
万方数据
维普
