生物炭通过改善酸性土壤中的养分来刺激茶的生长
第一作者
Peng Yan
第一单位
中茶所
通讯作者
Wenyan Han
Abstract
背景+问题：The benefits of biochar application for enhancing plant growth by improving soil fertility have been widely documented. However, there is little information on the effects of biochar on the growth of tea [Camellia sinensis (L.) Kuntze].
主要研究：We conducted a pot experiment to investigate the effects of biochar type (bamboo and rice) and application rate (2.5 % and 5.0 % w/w) on the growth and nutrient uptake of tea and the effects of biochar application on soil pH and nutrient availability.
结果1：Both bamboo biochar and rice biochar applied at rates of 2.5 % and 5.0 % significantly improved tea growth compared with the control, while no significant differences were observed among the biochar treatments. The biochar treatments increased the plant P, K, and Mg concentrations, which all showed significant positive relationships with the aboveground biomass, leaf area, and rate of photosynthesis. The soil pH and available P, K, and Mg concentrations were increased by biochar application, which contributed to improved tea nutrients.
结果2：Moreover, significant decreases in the plant Mn and Cu concentrations were observed with the biochar treatments, which were related to the increased soil pH and reduced soil-available Mn and Cu concentrations.
结论：This study showed that biochar could be used as a soil amendment to improve soil quality and promote tea growth by supplying P, K, and Mg and reducing the heavy metals Mn and Cu.
摘 要
生物炭应用通过改善土壤肥力促进植物生长的好处已被广泛证明。然而，关于生物炭对茶生长的影响的信息很少。我们进行了盆栽试验，研究了生物炭类型（竹炭和水稻）和施用量（2.5％和5.0％w / w）对茶的生长和养分吸收的影响以及生物炭施用对土壤pH和养分利用率的影响。与对照相比，以2.5％和5.0％的比例施用竹生物炭和大米生物炭均显着改善了茶的生长，而在生物炭处理之间未观察到显着差异。生物炭处理增加了植物的P，K和Mg浓度，这些浓度均与地上生物量，叶面积和光合作用速率呈显着正相关。通过施用生物炭增加了土壤的pH值和有效的P，K和Mg浓度，这有助于改善茶的养分。此外，通过生物炭处理可以观察到植物中Mn和Cu浓度显着下降，这与土壤pH值升高和土壤有效Mn和Cu浓度降低有关。这项研究表明，生物碳可以通过供应P，K和Mg并减少重金属Mn和Cu用作土壤改良剂，以改善土壤质量并促进茶的生长。（翻译有误的地方，请多多包涵）
DOI: https://doi.org/10.1016/j.scienta.2021.110078
Journal: Scientia Horticulturae
Impact Factor：2.769
Published date: 19 March 2021
END
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