N, P and K stoichiometry and resorption efficiency of nine dominant shrub species in the deserts of Xinjiang, China
N, P and K stoichiometry and resorption efficiency of nine dominant shrub species in the deserts of Xinjiang, China
复制标题
新疆荒漠9种优势灌木的N、P、K化学计量及吸收效率
DOI：
10.1111/1440-1703.12111
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发表时间：
2020-07
影响因子：
2
通讯作者：
Han Wenxuan
中科院分区：
文献类型：
--
作者：
Luo Yan;Peng Qingwen;He Maosong;Zhang Meixia;Liu Yanyan;Gong Yanming;Eziz Anwar;Li Kaihui;Han Wenxuan
植物营养化学计量学和吸收效率是反映植物营养状况和生物地球化学循环的重要功能性状。这些特征在沙漠灌木中没有很好的记录。本文通过对新疆地区24个站点荒漠植物绿叶和衰老叶片（或同化枝）中氮、磷、钾(K)含量的系统调查，研究了9种优势荒漠灌木物种氮、磷、钾的化学计量特征及其吸收效率的变化规律。假设荒漠灌木具有低氮、低磷、高钾的特征；考虑到该干旱区低氮磷高钾有效度，叶片氮磷吸收效率高但钾吸收效率低。在国家和全球水平上，这些灌木的平均叶片N浓度为18.9 mg g−1，叶片P浓度较低，但叶片K浓度较高（分别为1.2和17.0 mg g−1）。荒漠灌木叶片氮、磷、钾的平均（±SE）吸收效率分别为51.0±2.4%、54.9±2.0%和46.3±3.5%，低于全球木本植物。相对于相应的临界比值，绿叶N:P（17.2±0.8）和K:P（15.3±1.0）较高，相对于N（51.0%）和K（46.3%）的吸收效率较高（54.9%），表明新疆优势荒漠灌木普遍存在P（或P和N均缺乏）缺陷。此外，我们的结果显示，与大多数其他生态系统相比，我们的吸收水平更高。
Plant nutrient stoichiometry and resorption efficiency are important functional traits related to plant nutrient status and biogeochemical cycling. Such traits are not well documented for desert shrubs. We studied how the stoichiometry and resorption efficiency of nitrogen (N), phosphorus (P) and potassium (K) varied among nine dominant desert shrub species through systematically investigating their concentrations in green and senesced leaves (or assimilation branches) of desert plants at 24 sites across Xinjiang, China. We hypothesized that desert shrubs should have low leaf N and P but high leaf K concentrations; and have high leaf N and P but low K resorption efficiency, given the low N and P but high K availability in this arid region. These shrubs had a mean leaf N concentration of 18.9 mg g−1, and lower leaf P but higher leaf K concentration (1.2 and 17.0 mg g−1, respectively) than desert plants at national and global levels. The mean (±SE) resorption efficiencies of leaf N, P and K in the desert shrubs were 51.0 ± 2.4%, 54.9 ± 2.0% and 46.3 ± 3.5%, respectively, lower than in the woody plants globally. The higher green‐leaf N:P (17.2 ± 0.8) and K:P (15.3 ± 1.0) relative to the corresponding critical ratios, and the higher P resorption efficiency (54.9%) relative to N (51.0%) and K (46.3%) resorption efficiency, suggested that the dominant desert shrubs in Xinjiang generally suffer from P (or both P and N) deficiency. Additionally, our results showed little evidence of higher resorption relative to their counterparts in most other ecosystems.
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影响因子：
11.6
作者：
V. Suseela;N. Tharayil
通讯作者：
V. Suseela;N. Tharayil
DOI：
--
发表时间：
2016
期刊：
Acta Pratacultural Science
影响因子：
--
作者：
Tao Ye;L. Yaobin;Wu Gan-lin;Zhang Yuanming
通讯作者：
Tao Ye;L. Yaobin;Wu Gan-lin;Zhang Yuanming
影响因子：
4.8
作者：
H. O. Venterink;M. Wassen;A. Verkroost;P. C. Ruiter
通讯作者：
H. O. Venterink;M. Wassen;A. Verkroost;P. C. Ruiter
影响因子：
--
作者：
L. Guihua
通讯作者：
L. Guihua
影响因子：
6.1
作者：
Arft, AM;Walker, MD;Wookey, PA
通讯作者：
Wookey, PA