首页> 外文期刊>Journal of Sustainable Forestry >The influence of lignocellulose and hemicellulose biochar on photosynthesis and water use efficiency in seedlings from a Northeastern US pine-oak ecosystem
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The influence of lignocellulose and hemicellulose biochar on photosynthesis and water use efficiency in seedlings from a Northeastern US pine-oak ecosystem

机译:木质纤维素和半纤维素生物浆对东北美国松树生态系统幼苗光合作用和水利用效率的影响

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Improving plant water use efficiency (WUE) has the potential to lower plant susceptibility to drought. Amending soils with biochar has been suggested as a way to improve WUE, as it has been shown to increase the water holding capacity of soils. Here, we investigated the influence of two different biochar soil amendments on WUE measured by gas exchange and carbon isotopes of pine-oak ecosystem species. We measured WUE of individuals grown in soils where either lignocellulose or hemicellulose biochar was applied (10% v/v). WUE increased under lignocellulose, but not hemicellulose, biochar amendment during both late spring and early fall measurement periods in a single year study. However, net photosynthesis and stomatal conductance decreased in plants grown with biochar amendments. Physiochemical and sorption data provide a partial explanation of how biochar mechanisms impact soil-water-plant relations. Our results demonstrated that lignocellulosic biochar may be added to forest soils to reduce drought stress in pine-oak systems, but amendments may not lead to increases in carbon uptake rates.
机译:改善植物用水效率(WUE)具有降低植物对干旱易感性的潜力。已经提出了与Biochar的修改土壤作为改善WUE的方法,因为它已被证明可以增加土壤的水持有能力。在这里,我们调查了两种不同的Biochar土壤修正对由煤气交换和碳同位素测量的水料和松树生态系统物种的碳同位素的影响。我们测量了在施加木质纤维素或半纤维素生物丙烯(10%v / v)的土壤中生长的个体的WUE。 Wue在木质纤维素下增加,但在一年的研究中,生物纤维素,生物淀粉,生物炭修正,在一年的一年中的研究中。然而,用生物炭修正生长的植物净光合作用和气孔传导减少。物理化学和吸附数据提供了对生物炭机制如何影响土壤 - 水植物关系的部分解释。我们的结果表明,木质纤维素生物炭可以加入到森林土壤中以减少松树系统中的干旱胁迫,但修正可能不会导致碳吸收率增加。

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