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首页> 美国卫生研究院文献>Scientific Reports >Schima superba outperforms other tree species by changing foliar chemical composition and shortening construction payback time when facilitated by shrubs
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Schima superba outperforms other tree species by changing foliar chemical composition and shortening construction payback time when facilitated by shrubs

机译：木荷通过改变叶片的化学成分并缩短灌木的施工期从而优于其他树种。

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摘要

A 3.5-year field experiment was conducted in a subtropical degraded shrubland to assess how a nurse plant, the native shrub Rhodomyrtus tomentosa, affects the growth of the target trees Pinus elliottii, Schima superba, Castanopsis fissa, and Michelia macclurei, and to probe the intrinsic mechanisms from leaf chemical composition, construction cost (CC), and payback time aspects. We compared tree seedlings grown nearby shrub canopy (canopy subplots, CS) and in open space (open subplots, OS). S. superba in CS showed greater growth, while P. elliottii and M. macclurei were lower when compared to the plants grown in the OS. The reduced levels of high-cost compounds (proteins) and increased levels of low-cost compounds (organic acids) caused reduced CC values for P. elliottii growing in CS. While, the levels of both low-cost minerals and high-cost proteins increased in CS such that CC values of S. superba were similar in OS and CS. Based on maximum photosynthetic rates, P. elliottii required a longer payback time to construct required carbon in canopy than in OS, but the opposite was true for S. superba. The information from this study can be used to evaluate the potential of different tree species in the reforestation of subtropical degraded shrublands.
机译：在亚热带退化灌木丛中进行了为期3.5年的田间试验，以评估一种护理植物-天然灌木桃金娘（Rhodomyrtus tomentosa）如何影响目标树elliottii，荷叶荷叶木，栗树和雪莲（Michelia macclurei）的生长，并对其进行探测。叶片化学成分，建设成本（CC）和投资回收期方面的内在机制。我们比较了在灌木冠层（树冠子图，CS）和开放空间（开放子图，OS）中生长的树苗。与在OS中生长的植物相比，CS中的Super。S表现出更大的生长，而elliottii和Macclurei则更低。高成本化合物（蛋白质）水平的降低和低成本化合物（有机酸）水平的提高，导致CS中生长的elliottii的CC值降低。同时，CS中低成本矿物质和高价蛋白质的水平均增加，因此超级链球菌的CC值在OS和CS中相似。基于最大的光合速率，P。elliottii在树冠层中比在OS中需要更长的投资回收时间来构建所需的碳，但是对S. superba则相反。这项研究提供的信息可用于评估不同树种在亚热带退化灌木林的重新造林中的潜力。

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