论文部分内容阅读
针对水生植物堆肥过程中氮素损失严重的现状,探讨以生物质炭为添加剂的堆肥体氨挥发控制技术,以伊乐藻和稻草为供试材料,采用静态高温好氧堆肥的方法,在生物质炭不同添加比例条件下,监测了伊乐藻与稻草混合堆置过程中氨挥发及其影响因素的变化动态。结果表明:整个堆肥过程中,氨累积挥发量与生物质炭添加比例关系密切(P<0.01),与不添加生物质炭的常规对照处理相比,添加比例为5%、10%的处理增加了氨的累积挥发量,而添加比例为15%、20%的处理降低了氨的累积挥发量;不同堆肥时间段,生物质炭不同添加比例处理0~3 d的氨累积挥发量均大于对照,4~6 d的氨累积挥发量,除添加比例5%处理外,均小于对照;伊乐藻堆肥体的氨挥发速率与堆温、铵态氮含量具有显著的偏相关性,其偏相关性均达到P<0.05的显著水平;增加生物质炭添加比例,不仅提高了堆肥温度,对堆肥体的氨挥发损失具有负向的促进作用,同时也降低了堆肥体的铵态氮含量,对堆肥体的氨挥发损失具有正向的抑制作用,生物质炭对伊乐藻堆肥体氮素的氨挥发损失具有促进与抑制双重性的作用效应。
Aiming at the serious nitrogen loss in composting process of aquatic plants, this paper discussed the ammonia volatilization control technology of composting body with bio-charcoal as additive, Elodea genovensis and straw as test materials, using static high-temperature aerobic composting method, The changes of ammonia volatilization and its influencing factors during the mixed stacking of Elodea alba with straw were monitored under the condition of different additive ratios of material carbon. The results showed that the cumulative amount of ammonia volatilized during the composting process was closely related to the percentage of biomass carbon added (P <0.01). Compared with the conventional control without biochar, the proportion of 5% and 10% The cumulative volatilization of ammonia was 15% and 20%, respectively. The cumulative volatilization of ammonia during 0 ~ 3 days of different composting time was higher than that of the control , And the cumulative ammonia volatilization from 4 to 6 days was less than that of the control except for the 5% addition rate. The ammonia volatilization rate of Compost alluvial was significantly correlated with the composting temperature and the content of ammonium nitrogen, and the partial correlation All reached a significant level of P <0.05. Increasing the proportion of biomass carbon added not only increased the composting temperature but also had a negative effect on the ammonia volatilization loss of the composting body and also reduced the ammonium nitrogen content of the composting body. The ammonia volatilization loss of the compost body has a positive inhibition, and the effect of biomass charcoal on the ammonia volatilization loss of Nitraria alopecuroides compost body has the dual role of promotion and inhibition.