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首页> 外文期刊>Journal of forest research >Foraging ability and growth performance of four subtropical tree species in response to heterogeneous nutrient environments
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Foraging ability and growth performance of four subtropical tree species in response to heterogeneous nutrient environments

机译：四种亚热带树种对异质养分环境的觅食能力和生长性能

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摘要

Considering the ubiquitous heterogeneity in spatial distribution of soil nutrients, we conducted a pot experiment to investigate the foraging traits and growth performance of four important subtropical tree species in a heterogeneous nutrient environment. The tested species exhibited large differences in foraging traits as well as growth benefits obtained from root foraging. Pinus massoniana, Schima superba and Liriodendron chinese all showed a higher degree of root morphological plasticity (expressed as relative fine root mass difference; RFRMD) than Cunninghami lanceolata (P < 0.05). P. massoniana exhibited the largest degree of morphological plasticity, followed by L. chinese and S. superba, whereas there were no significant differences in RFRMD among the three species. S. superba was the only species that exhibiting both morphological plasticity and physiological plasticity. Both P. massoniana and S. superba exhibited greater whole-seedling biomass and high sensitivity in response to nutrient heterogeneity, resulting from both types of plasticity. In contrast, both types of root plasticity were poor for C. lanceolata, resulting in poor growth benefit in heterogeneous environments. As for L. chinese, the root proliferation in nutrient-rich patches occurred at the expense of depressed root growth in other parts of the root system, leading to the lack of increment in total root biomass and nutrient absorption in heterogeneous environments. Our results provide insight and practical advice for silviculture and forest management.
机译：考虑到土壤养分空间分布普遍存在的异质性，我们进行了盆栽试验，研究了在养分异质环境中四种重要的亚热带树种的觅食性状和生长性能。被测物种在觅食性状以及从根觅食获得的生长益处方面表现出很大差异。马尾松，木荷和鹅掌chinese均表现出比杉木偏高的根形态可塑性（表示为相对细根质量差; RFRMD）（P <0.05）。马尾松表现出最大的形态可塑性，其次是华夏草和超级链霉菌，而这三个物种在RFRMD上没有显着差异。超级链球菌是唯一同时具有形态可塑性和生理可塑性的物种。由于两种类型的可塑性，马尾松和超级链霉菌均表现出更大的全苗生物量和对营养异质性的高敏感性。相比之下，两种类型的根可塑性均不适用于轮叶梭菌，从而导致在异质环境中的生长效益差。对于华夏落叶松，发生在营养丰富的斑块中的根系增殖是以损害根系其他部分根系生长的代价为代价的，从而导致在异质环境中总根生物量和养分吸收不足。我们的结果为造林和森林管理提供了见识和实用建议。

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