Negative effects of fertilization on plant nutrient resorption

营养物 人类受精 吸收 生物 营养循环 农学 生态系统 植物 生态学 化学 内分泌学 有机化学
作者
Z. Y. Yuan,Han Y. H. Chen
出处
期刊:Ecology [Wiley]
卷期号:96 (2): 373-380 被引量:244
标识
DOI:10.1890/14-0140.1
摘要

Plants in infertile habitats are thought to have a high rate of nutrient resorption to enable them reuse nutrients more efficiently than those in fertile habitats. However, there is still much debate on how plant nutrient resorption responds to nutrient availability. Here we used a meta‐analysis from a global data set of 9703 observations at 306 sites from 508 published articles to examine the effects of nitrogen (N) and phosphorus (P) fertilization on plant foliar N and P concentrations and resorption efficiency. We found that N fertilization enhanced N concentration in green leaves by 27% and P fertilization enhanced green‐leaf P by 73% on average. The N and P concentrations in senesced leaves also increased with respective nutrient fertilization. Resorption efficiencies (percentage of nutrient recovered from senescing leaves) of both N and P declined in response to respective nutrient fertilization. Combined N and P fertilization also had negative effects on both N and P resorption efficiencies. Whether nutrient resorption efficiency differs among plant growth types and among ecosystems, however, remains uncertain due to the limited sample sizes when analyzed by plant growth types or ecosystem types. Our analysis indicates that fertilization decreases plant nutrient resorption and the view that nutrient resorption is a critical nutrient conservation strategy for plants in nutrient‐poor environments cannot be abandoned. The response values to fertilization presented in our analysis can help improve biogeochemical models.
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