摘要
为科学地评价秸秆发酵进程,准确衡量秸秆低温下的发酵效果,本文采用投影寻踪方法对玉米秸秆与粪水在低温发酵不同阶段的堆肥质量进行评价。结果表明:随着发酵时间的延长,堆肥温度和氧化钾及总有机质含量先升后降,五氧化二磷先增后降而后又上升,其整体呈上升趋势,堆肥全氮含量和失重率逐渐增加,C/N和含水量逐渐降低。其中C/N经过30 d发酵后降低到19.83,堆肥达到还田要求。运用投影寻踪模型对堆肥不同时期发酵质量的综合评价结果说明,堆肥发酵综合质量随着发酵时间的延长而逐渐提高,第30天堆肥发酵质量最高,其函数投影值达到了2.432 3。本研究为解决高寒地区秸秆、粪污的消纳处理提供了可行的技术参考。
In order to evaluate the process and the effect of straw fermentation at low temperature scientifically and accurately, this paper uses projection pursuit method to evaluate the composting quality of corn straw and fecal water at different stages of low temperature fermentation. The results showed that: with the extension of fermentation time, the compost temperature, the content of potassium oxide and total organic matter first increased and then decreased, and the content of phosphorus pentoxide first increased and then decreased and then increased. As a whole, the content of total nitrogen and weight loss increased, and the content of C/N and water decreased. Among them, C/N decreased to 19.83 after 30 days fermentation, and compost reached the requirement of returning to the field. The result of using projection pursuit model to evaluate the fermentation quality of compost in different period showed that, the comprehensive quality of composting fermentation gradually improved with the extension of fermentation time, and the fermentation quality of compost was the highest on the 30 th day, and its function projection value reached 2.432 3. This study provides a feasible technical reference for the absorption of straw and manure pollution in the alpine region.
作者
李嘉祺
刘卓
关法春
张永锋
李平
贺延国
王将旭
LI Jiaqi;LIU Zhuo;GUAN Fachun;ZHANG Yongfeng;LI Ping;HE Yanguo;WANG Jiangxu(The College of Engineering and Technology,Jilin Agricultural University,Changchun 130118;Jilin Academy of Agricultural Sciences,Changchun 130033;Tibet Zangjia Ecological Science&Technology Development Co.,Ltd.,Linzhi 860000;China Water Northeastern Investigation and Design Research Co.,Ltd.,Changchun 130061,China)
出处
《东北农业科学》
北大核心
2020年第2期125-128,共4页
Journal of Northeast Agricultural Sciences
基金
吉林省农业科技创新工程项目(CXGC2018ZY026)。
关键词
堆肥
质量评价
投影寻踪
低温发酵
Compost
Quality evaluation
Projection pursuit
Low temperature fermentation
