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首页> 外文期刊>Plant and Soil >Chemical transformation, phytotoxicity and nutrient availability in progressive composting stages of wheat straw.
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Chemical transformation, phytotoxicity and nutrient availability in progressive composting stages of wheat straw.

机译：小麦秸秆逐步堆肥阶段的化学转化，植物毒性和养分利用率。

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A 2-month wheat-straw composting experiment was conducted to monitor chemical maturity parameters in addition to plant growth limiting factors. Wheat straw with 5% dry weight horse manure was adjusted to C:N= 45 with urea. The pile was rotated and homogeneous samples taken every 4 days. The most significant changes in straw fractions occurred in the first 20 days of composting, as suggested by wet chemical analyses, thermogravimetry and 13C NMR spectrometry. The effect of the composts incubated forincreasing durations (0-60 days) on Lolium rigidum yield was evaluated under greenhouse conditions. No linear correlation was observed between composting time and the potential of compost to improve plant yield. In samples taken after 20 days in the conditions studied (post-mature composts), plant yield was independent of most organic matter characteristics but closely paralleled available N and P concentration in the compost. It is suggested that these elements become immobile in the course of composting.
机译：除植物生长限制因素外，还进行了为期两个月的麦草堆肥实验，以监测化学成熟度参数。用尿素将干重为5％的马粪小麦秸秆调整为C：N = 45。旋转桩，每4天取样一次。湿化学分析，热重分析和13 C NMR光谱分析表明，秸秆组分中最显着的变化发生在堆肥的前20天。在温室条件下评估了增加堆肥时间（0-60天）培养的堆肥对刚性黑麦草产量的影响。在堆肥时间和堆肥提高植物产量的潜力之间未发现线性相关性。在所研究的条件下（成熟堆肥）20天后采集的样品中，植物产量与大多数有机质特征无关，但与堆肥中可利用的氮和磷浓度紧密相关。建议这些元素在堆肥过程中不能移动。

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