呼伦贝尔草地植物茎秆和叶片中养分的时间动态与回收

张效境, 梁潇洒, 马望, 王正文

Temporal variation and resorption of nutrients in plant culms and leaves in Hulun Buir grassland

ZHANG Xiao-Jing, LIANG Xiao-Sa, MA Wang, WANG Zheng-Wen

表4 不同计算方法获得的呼伦贝尔草地植物茎秆和叶片氮(N)、磷(P)回收效率的差异状况(平均值±标准差)

Table 4 Difference in nitrogen (N) and phosphorus (P) resorption efficiency of Hulun Buirr grassland plant culms and leaves obtained by different calculation methods (mean ± SD)

器官 Organ 养分 Nutrient 样本量 n 回收效率 Resorption efficiency (%) 低估值 Underestimation value (%) 基于养分最大含量 Based on maximum nutrient content 基于8月20日养分含量 Based on nutrient content of August 20 叶片 Leaf N 22 66.75 ± 7.70 64.69 ± 8.80 2.06 ± 3.31 P 22 77.26 ± 7.97 71.32 ± 14.32 5.94 ± 9.35 茎秆 Culm N 11 61.65 ± 4.24 58.72 ± 6.55 2.93 ± 4.85 P 11 78.33 ± 9.90 70.93 ± 15.33 7.39 ± 11.81