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首页> 外文期刊>Plant and Soil >The activities of soil and root acid phosphatase in the nine tropical rain forests that differ in phosphorus availability on Mount Kinabalu, Borneo
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The activities of soil and root acid phosphatase in the nine tropical rain forests that differ in phosphorus availability on Mount Kinabalu, Borneo

机译：婆罗洲京那巴鲁山的9种热带雨林中磷的有效性不同，土壤和根酸磷酸酶的活动

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摘要

Tropical rain forests on deeply weathered soils are increasingly thought to be limited by phosphorus (P), where plants and associated organisms would demonstrate adaptations to efficiently recycle P using acid phosphatase from organic matter. The activities of soil and root acid phosphatase were investigated in nine tropical rain forests that demonstrated a 20-fold difference in the soil organic P pool on Mt. Kinabalu, Borneo. Acid phosphatase activity was measured at pH6.0 using p-nitrophenyl phosphate as substrate. The specific phosphatase activity of tree roots on a soil-surface-area basis was significantly positively related with P-use efficiency of above-ground productivity, suggesting a physiological linkage between above and below-ground systems in the adaptation to P deficiency. The phosphatase activities of soils and roots were significantly negatively correlated with the pool size of soil organic P fractions, suggesting that demand for P determines phosphatase activities. It is suggested that tree roots and soil microbes develop more active phosphatases in response to the chronic shortage of soil P, which forms the basis for an important functional role for the efficient acquisition of P from soil organic matter.
机译：人们越来越多地认为，在深度风化的土壤上的热带雨林受到磷（P）的限制，其中的植物和相关生物将表现出适应性，可以利用有机物质中的酸性磷酸酶有效地回收磷。在九个热带雨林中调查了土壤和根部酸性磷酸酶的活性，结果表明，山上的有机磷库有20倍的差异。婆罗洲京那巴鲁。使用对硝基苯基磷酸酯作为底物，在pH6.0下测量酸性磷酸酶活性。在土壤表层基础上，树根的特定磷酸酶活性与地上生产力的磷利用效率显着正相关，这表明地上和地下系统在适应磷缺乏方面具有生理联系。土壤和根部的磷酸酶活性与土壤有机磷组分的库大小显着负相关，表明对磷的需求决定了磷酸酶的活性。有人提出，树根和土壤微生物会因土壤P的长期缺乏而产生更多的活性磷酸酶，这为有效地从土壤有机质中获取P发挥重要的功能作用奠定了基础。

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