Variations in foliar nutrient resorption efficiency of different plant growth forms in a temperate sandy grassland
Variations in foliar nutrient resorption efficiency of different plant growth forms in a temperate sandy grassland
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温带沙质草原不同植物生长形态叶面养分吸收效率的变化
DOI：
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发表时间：
2011
影响因子：
0.5
通讯作者：
Zhao, Xueyong
中科院分区：
文献类型：
--
作者：
Mao, Wei;Li, Yulin;Cui, Jianyuan;Zuo, Xiaoan;Zhao, Xueyong
Foliar nutrient resorption is an important strategy which allows leaf nutrients to be reused rather than lost with leaf fall, particularly in nutrient-poor ecosystems where even small nutrient losses can have significantly negative impacts on plant survival, competitive ability, and fitness. However, plants vary greatly in nitrogen (N) and phosphorus (P) resorption among plant growth forms during leaf senescence, which may be vital to understand the role of plant growth forms in ecosystem functioning. Green and senesced leaf N and P concentrations of 39 plant species in sandy grassland (Horqin Sand Land) of northern China were analyzed to detect variations of nutrient resorption efficiency among plant growth forms. The results showed that nitrogen resorption efficiency (NRE) ranged from 29% to 74%, with an average (± SD) of 50.3 ± 11.2%, and phosphorus resorption efficiency (PRE) varied among species between 46% and 82%, with a mean (± SD) of 68.4 ± 6.9%, suggesting that nutrient resorption is a vital nutrient conservation strategy in this ecosystem. In addition, NRE and PRE differed significantly among the dominant plant growth forms in this sandy grassland. NRE for N-fixing species and graminoids were significantly lower relative to NRE for shrubs and forbs, but mean PRE of graminoids was significantly higher than those of N fixers, shrubs and forbs. These data give indirect evidence that the differentiation of N and P conservation serve as an important mechanism permitting the co-existence of growth forms in arid systems.
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影响因子：
0.5
作者：
Mc Li;Liu;Dy;Deyi;GQ Kong
通讯作者：
Mc Li;Liu;Dy;Deyi;GQ Kong
影响因子：
5.2
作者：
Xiaoye Zhang;S. Gong;S. Gong;T. L. Zhao;R. Arimoto;Yaqiang Wang;Z. J. Zhou
通讯作者：
Xiaoye Zhang;S. Gong;S. Gong;T. L. Zhao;R. Arimoto;Yaqiang Wang;Z. J. Zhou
影响因子：
1.8
作者：
Tonghui Zhang;Halin Zhao;Shenggong Li;R. Zhou
通讯作者：
Tonghui Zhang;Halin Zhao;Shenggong Li;R. Zhou
影响因子：
4
作者：
P. Vitousek;R. Howarth
通讯作者：
P. Vitousek;R. Howarth
影响因子：
2.7
作者：
McCulley, RL;Jobbágy, EG;Jackson, RB
通讯作者：
Jackson, RB