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首页> 外文期刊>Soil Research >Composting and vermicomposting of cattle manure and green wastes under tropical conditions: carbon and nutrient balances and end-product quality.
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Composting and vermicomposting of cattle manure and green wastes under tropical conditions: carbon and nutrient balances and end-product quality.

机译：在热带条件下牛粪和绿色废物的堆肥和and堆肥：碳和营养物质的平衡以及最终产品的质量。

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Composting and vermicomposting are interesting options for utilisation in restoration and improvement of weathered and infertile tropical soils. The aim of this study was to assess quality of composts and vermicomposts produced from cattle manure (CM) and green wastes (GW) blended at different ratios under tropical conditions. Chemical, biochemical, and biological indicators were used to identify the role of earthworms and the factors affecting organic matter (OM) stability and nutrient balance in the thermophilic (days 0-65) and stabilisation (days 66-183) phases. Total carbon (C) losses averaged 55% and were greater during vermicomposting and for products with a high GW content. One-third of C losses occurred during the stabilisation phase. This phase presented a high level of C mineralisation, which would be linked to high ambient temperatures (~30 degrees C). Although OM content was similar for all of the final products, respiration measurements indicated that OM stability was greater for vermicomposts. These results indicated that humification and OM decomposition occurred simultaneously during vermicomposting. The material source ratio did not affect the OM biodegradability of the final products. No losses were observed for phosphorus (P), calcium (Ca), and magnesium (Mg). However, high potassium (K) (45%) and nitrogen (25%) losses were detected and were higher during vermicomposting and for the products with a high GW content. Final vermicomposts were enriched in P, Ca, and Mg, and slightly depleted in K compared with normal composts. Nitrogen content was similar for both composting methods. Plant response to amendment addition was higher for intermediate rates of GW and CM (e.g. 40-60% for CM), with no differences between composts and vermicomposts. The results of this study indicated that vermicomposting was a process that favoured OM stabilisation, which is a key factor for the adoption of this practice in the tropics.
机译：堆肥和ver堆肥是用于风化和不育热带土壤的恢复和改良的有趣选择。这项研究的目的是评估在热带条件下以不同比例混合的牛粪（CM）和绿色废物（GW）产生的堆肥和ver堆的质量。化学，生物化学和生物指标用于确定identify的作用以及影响嗜热阶段（0-65天）和稳定阶段（66-183天）中有机质（OM）稳定性和养分平衡的因素。总碳（C）损失平均为55％，在ver堆肥期间和GW含量高的产品中更大。 C损失的三分之一发生在稳定阶段。此阶段呈现出高水平的C矿化作用，这与较高的环境温度（约30摄氏度）有关。尽管所有最终产品的OM含量均相似，但呼​​吸测量结果表明，ver藜的OM稳定性更高。这些结果表明腐殖化和OM分解同时发生。原料比例不影响最终产品的OM生物降解性。没有观察到磷（P），钙（Ca）和镁（Mg）的损失。但是，在ver堆肥期间以及GW含量高的产品中，发现钾（K）（45％）和氮（25％）的损失较高，并且损失较高。与普通堆肥相比，最终的mi堆富含P，Ca和Mg，而K则略有减少。两种堆肥方法的氮含量相似。 GW和CM中等比率的植物对添加修正物的反应更高（例如CM为40-60％），堆肥和ver堆肥之间没有差异。这项研究的结果表明，ver堆肥是有利于OM稳定化的过程，这是在热带地区采用这种做法的关键因素。

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