Natural restoration has better soil acid phosphatase kinetics than artificial plantations

IF 1.3 4区 环境科学与生态学 Q3 ECOLOGY
Yun Wang , Xiaoyang Zhang , Jinmei Bao , Longchao Yang , Bo Liu , Xinli Wang , Chi Zhang , Jing Zhang , Yixuan Liu , Lizhi Wang
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Abstract

Soil acid phosphatase kinetics is important for clarifying phosphorus supply under different soil fertility conditions. However, little is known about the effects of the forest restoration type on the kinetics of soil acid phosphatase. Using a microplate fluorometric assay, we tested soil acid phosphatase kinetics and influencing factors in artificially restored native oriental oak (Quercus variabilis Bl.) plantations and introduced Japanese black pine (Pinus thunbergii Parl.) plantations and naturally restored secondary forests. Five, five, and six plots were randomly selected from each forest restoration type in Yimeng Mountain area in Northern China. Forest restoration type significantly influenced acid phosphatase kinetics. Acid phosphatase activity and acid phosphatase activity dissimilarity was higher in natural secondary forests than those in oriental oak plantations, which in turn were higher than those observed in black pine plantations. The difference between natural secondary forests and black pine plantations was significant. Moreover, the heterogeneity of soil acid phosphatase activity between the natural secondary forests and the two plantations was significantly higher than that between the two plantations. Forest restoration type did not significantly influence the potential maximum activity (Vmax), half-saturation constant (Km), or catalytic efficiency (Vmax/Km) of acid phosphatase. Ammonium nitrogen and available phosphorus content significantly influenced acid phosphatase kinetics, explaining 61.9% of the variation in acid phosphatase activity under different substrate concentrations in the three forest restoration types. Vmax was positively influenced by available phosphorus content. The Km value was positively influenced by total carbon content. Natural secondary forests showed better soil acid phosphatase kinetics than the native oriental oak plantations, which were better than those in the introduced black pine plantations, possibly due to the higher ammonium nitrogen and available phosphorus content. This study contributes novel insights into phosphorus supply under forest restoration types, ultimately providing theoretical bases for forest restoration in warm temperate areas.
自然恢复土壤酸性磷酸酶动力学优于人工人工林
土壤酸性磷酸酶动力学对阐明不同土壤肥力条件下的磷供应具有重要意义。然而,森林恢复类型对土壤酸性磷酸酶动力学的影响尚不清楚。采用荧光微孔板法,对人工恢复的东方栎人工林、引进的日本黑松人工林和自然恢复的次生林土壤酸性磷酸酶动力学及其影响因素进行了研究。在沂蒙山区各森林恢复类型中随机选取5个、5个和6个样地。森林恢复类型对酸性磷酸酶动力学有显著影响。天然次生林的酸性磷酸酶活性和酸性磷酸酶活性差异均高于东方栎林,而东方栎林的酸性磷酸酶活性差异又高于黑松林。天然次生林与人工林间差异显著。土壤酸性磷酸酶活性在天然次生林与两种人工林之间的异质性显著高于两种人工林之间。森林恢复类型对酸性磷酸酶潜在最大活性(Vmax)、半饱和常数(Km)和催化效率(Vmax/Km)无显著影响。铵态氮和速效磷含量显著影响酸性磷酸酶动力学,可解释3种森林恢复类型不同底物浓度下酸性磷酸酶活性变化的61.9%。有效磷含量对Vmax有正影响。Km值与总碳含量呈正相关。天然次生林土壤酸性磷酸酶动力学优于天然栎林,优于引进黑松林,这可能与土壤中铵态氮和有效磷含量较高有关。本研究对森林恢复类型下的磷供应提供了新的认识,最终为暖温带森林恢复提供理论依据。
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来源期刊
CiteScore
3.60
自引率
0.00%
发文量
57
审稿时长
>0 weeks
期刊介绍: Acta Oecologica is venue for the publication of original research articles in ecology. We encourage studies in all areas of ecology, including ecosystem ecology, community ecology, population ecology, conservation ecology and evolutionary ecology. There is no bias with respect to taxon, biome or geographic area. Both theoretical and empirical papers are welcome, but combinations are particularly sought. Priority is given to papers based on explicitly stated hypotheses. Acta Oecologica also accepts review papers.
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