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首页> 外文期刊>Landbauforschung >Effect of C/N ratio on the composting of vineyard pruning residues.
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Effect of C/N ratio on the composting of vineyard pruning residues.

机译：碳氮比对葡萄园修剪残留物堆肥的影响。

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We investigated the composting process of fresh, chopped vineyard pruning residues (DM 35%) at various initial C:N ratios of 60:1 (original), 52:1, 40:1, and 29:1 for 133 days in 250 litre rotting boxes with self-aeration. Urea (46% N) was added as nitrogen supplement to attain a desirable C:N ratio. The composts were turned after 14, 23, 30, 38, 52, 65, 79, 93, 111, 122, and 133 days. The degradation of organic matter was between 19% (at the initial C:N ratio of 60:1) and 39% (at the initial C:N ration of 29:1) within 133 days, and the resulting C:N ratios were between 46:1 and 18:1. The compost maturity was evaluated by a self-heating test, C:N ratio, NH4+/NO3+ ratio, NH4+-N content, E665, and germination index. A supplementation of about 1.5 litres water per kg fresh material was necessary to stabilize the biological activity of the composting process during the first 40 to 60 days. Nitrogen supplementation with urea, or another nitrogen source, can accelerate the rotting process, but the higher the urea supplementation, the higher the losses of nitrogen by ammonia evaporation. The optimum urea nitrogen supplementation was in the range of 2 g kg-1 dry matter. The parameters of C:N ratio, NH4+/NO3+ ratio and E665 were no clear criteria for compost maturity, because they depend on the type of material. The simple germination test could be used to determine the compost maturity in the composting of vineyard pruning residues. Based on the results, a rotting period of at least 80 days was proposed for chopped vineyard pruning residues.
机译：我们调查了新鲜，切碎的葡萄园修剪残渣（DM 35％）在250升中以60：1（原始），52：1、40：1和29：1的各种初始C：N比率堆肥过程133天的过程。带有自曝气的腐烂箱。添加尿素（46％N）作为氮补充剂，以获得理想的C：N比。在14、23、30、38、52、65、79、93、111、122和133天后将堆肥翻面。在133天内，有机物的降解率在19％（最初的C：N比率为60：1）和39％（最初的C：N比率为29：1）之间，并且最终的C：N比率为在46：1和18：1之间。通过自热试验，C：N比，NH 4 + / NO 3 + 比率，NH 4 + -N含量，E665和发芽指数。每公斤新鲜物料需补充约1.5升水，以稳定堆肥过程前40至60天的生物活性。用尿素或另一种氮源补充氮可以加速腐烂过程，但是补充尿素越高，氨气蒸发损失的氮就越高。尿素氮的最佳添加量为2 g kg -1 干物质。 C：N比，NH 4 + / NO 3 + 比和E665的参数均不清楚堆肥的成熟度，因为它们取决于物料的类型。简单的发芽试验可用于确定葡萄园修剪残留物堆肥中的堆肥成熟度。根据结果​​，切碎的葡萄园修剪残留物建议至少腐烂80天。

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