杨树主要营养元素内循环及外循环研究Ⅰ.落叶前后各部位养分浓度及养分贮量变化
沈善敏, 宇万太, 张璐, 廉鸿志
Internal and external nutrient cyclings ot poplar tree Ⅰ. Changes of nutrient storage in different parts of poplar tree before and after leaf fallen
Shen Shanmin, Yu Wantai, Zhang Lu, Lian Hongzhi
应用生态学报
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1992, (4): 296
-301
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