高温堆肥的生物化学变化特征及植物抑制物质的降解规律

Characterization of Biochemistry and Degradation of Plant-Inhibited Materials During High-Temperature Composting

采用现场堆肥制作过程中生化指标检测及种子发芽实验方法，研究了高温堆肥的生化变化特征及植物抑制物质的降解规律。结果表明，在堆肥制作中， pH和电导率较堆制前有所提高，且在持续高温阶段高于后期熟化阶段；纤维分解酶始终保持旺盛的活性，堆制前、中、后期各出现一个峰；脲酶活性在堆制前期迅速上升，中后期基本趋于稳定；相反过氧化氢酶活性前期呈下降趋势，在中后期有所回升；在整个堆肥制作中，堆肥浸提液严重影响种子发芽，最终堆制结束时发芽率也没有明显的提高。

It has been discovered that during high-temperature composting using organic manure and stalk as compost content, pH values and rate of conductance increased compared with prior to treatment. In addition, the values during sustained thermal period were higher than that in late mature period. Cellulose decomposing enzyme kept at a high activity during the whole composting course, exhibited high values in early period, middle period and late period, respectively. The activity of urease rose up quickly in early period and kept stable in mid-later period. In contrast, the activity of catalase decreased in early period and rose again in next two periods. Plant inhibited substances resulted in from the system had a severely negative effect on seed germination, and the rate of seed germination has not been improved obviously.