REGULATING EFFECT OF DENSITY AND TOP-DRESSING TIME OF NITROGEN FERTILIZER ON ~(14 ) C-ASSIMILATION AND DISTRIBUTION OF ASSIMILATE OF LARGE-SPIKE CULTIVAR OF WHEAT

ZHAO Hui\|jie\+1\ ZOU Qi\+2\ GUO Tian\|cai\+1\ YU Zhen\|wen\+2 DONG Zhong\|dong\+1\ FENG Chun\|ye\+1 (1.National Research Center for Engineering and Technology of Wheat, Henan Agricultural Univrsity, Zhengzhou, Henan prov.\ 450002;2. Shandong Agricultural University, Taian, Shandong prov.\ 271018)

Journal of Nuclear Agricultural Sciences ›› 2003, Vol. 17 ›› Issue (01) : 67-72.