Utilization Characteristics of$NO^{-}_{3}-^{15}$N and $NH^{+}_{4}-{15}$N for Four Pear Seedlings
GE Shunfeng, XIA Ying, SHEN Hongyan, ZHANG Lili, YAO Yaqian, LIU Songzhong, JIANG Yuanmao
Journal of Nuclear Agricultural Sciences . 2019, (4): 766 -771 .  DOI: 10.11869/j.issn.100-8551.2019.04.0766