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首页> 外文期刊>Forest Ecology and Management >Soil and tree responses to the application of wood ash containing charcoal in two soils with contrasting properties.
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Soil and tree responses to the application of wood ash containing charcoal in two soils with contrasting properties.

机译：土壤和树木对两种具有对比特性的含木炭木炭施用的反应。

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Mixed wood ash (MWA), a mixture of fly ash and charcoal generated in power plants, could be used to replenish nutrients and organic matter in intensively managed soils. However, the response of the system will be determined by the soil properties, which will modify the interactions between soil components, microorganisms and plants. The study involved two young Pinus radiata plantations growing on soils that differed in texture, soil organic matter (SOM) and aeration. The soils were treated with MWA alone (a single dose of 4.5 tonnes ha-1 or three annual doses of 4.5 tonnes ha-1) or with MWA supplemented with P fertilizer (4.5 Mg MWA plus 45 kg P ha-1). Analysis of the MWA revealed that the organic compounds in the ash were strongly aromatic. Although MWA is less reactive than fly wood ash, application of MWA enhanced the long-term nutrient availability and positively affected tree nutrition (mainly for P and K) and growth. Significant tree growth responses were recorded 3 yr after the first application. Supplementation with mineral P fertilizer was not required with the larger amounts of MWA (x3 doses). Loss of elements by leaching was low, even in the sandy soil. The SOM content of the sandy soil increased in response to both treatments; this was attributed to the addition of charcoal but also to the higher SOM turnover in the litter. Microbial activity was enhanced in both soils, especially in the sandy soil. In conclusion, the soil response to the application of MWA is greatly influenced by the soil properties; the nutrient and SOM dynamics are directly affected by interactions between the ash and soil components and indirectly by soil biological activity and plant growth.
机译：混合木灰（MWA）是发电厂产生的粉煤灰和木炭的混合物，可用于在集约化管理的土壤中补充养分和有机物质。但是，系统的响应将由土壤特性决定，土壤特性会改变土壤成分，微生物和植物之间的相互作用。该研究涉及两个生长在不同质地，土壤有机质（SOM）和通气的土壤上的辐射松幼林。仅用MWA处理土壤（单剂4.5吨ha -1 或3种年剂量4.5吨ha -1 ）或MWA补充P肥（ 4.5 Mg MWA加45 kg P ha -1 ）。对MWA的分析表明，灰分中的有机化合物具有很强的芳香性。尽管MWA的反应性不如粉煤灰，但施用MWA可以提高长期养分的利用率，并积极影响树木的营养（主要用于磷和钾）和生长。首次施用3年后记录到明显的树木生长反应。大量的MWA（x3剂量）不需要补充矿物P肥料。即使在沙质土壤中，浸出元素的损失也很低。两种处理均使沙质土壤的SOM含量增加;这归因于木炭的添加，也归功于垫料中较高的SOM转化率。两种土壤，特别是沙质土壤中的微生物活性均得到增强。总之，土壤对MWA应用的响应受土壤性质的影响很大。灰分与土壤成分之间的相互作用直接影响养分和土壤有机质的动态变化，土壤生物活性和植物生长间接影响其养分和土壤有机质动态。

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