15N t racer 第1页

INCREMENTAL EFFECT OF RARE EARTH\|AMMONIUM BICARBONATE THE ABSORPTION DISTRIBUTION AND UTILIZATION OF N IN DIFFERENTNITROGENN FOREMS BY AMERICAN GINSENGS NITROGEN UPTAKE AND FERTILIZER NITROGEN USE EFFICIENCY OF WHEAT UNDER DIFFERENT SOIL WATER CONDITIONS ABSORPTION OF NITROGEN BY GINSENG AND EFFECT OF NITROGEN ON 14 C ASSIMILATE DISTRIBUTION ABSORPTION AND UTILIZATION OF FERTILIZER N AND SOIL N BY RICE AT BASAL EAR STAGE