Composting Efficiency of Urban Forest Litter and River Sediment at Different Proportions

作     者：朱兆华 官昭瑛 徐国钢 陈晓蓉 Zhaohua ZHU;Zhaoying GUAN;Guogang XU;Xiaorong CHEN

作者机构：广东省受损边坡生态景观重建工程中心深圳市万信达生态环境股份有限公司广东深圳518049 

基　　金：Supported by National Spark Program of China(2010GA781004) Shenzhen Science and Technology Plan Project(CXZZ20140422142833835,CXZZ20150527171538718,GCZX2015051514435234)~~ 

出 版 物：《Agricultural Science & Technology》 (农业科学与技术（英文版）)

年 卷 期：2017年第18卷第8期

页      码：1422-1427,1464页

摘      要：In order to explore a technology for producing organic fertilizer by composting urban forest litter and river sediment passivated by fly ash, an experiment was conducted to study dynamic changes of several parameters including temperature, pH, organic matter, C/N and germination index （GI） during high-temperature composting of urban forest litter and river sediment at five different proportions （1：1 （Ⅰ）, 1：2 （Ⅱ）, 1：3 （Ⅲ）, 2：1 （Ⅳ） and 3：1 （Ⅴ））. Results showed that the temperature and pH increased first and then decreased; at the proportion of 3：1, the temperature increased rapidly and the high-temperature duration was longest （5 d）; at the end of the composting, all the treatments reached the decomposed status, the pH ranged from 7.47 to 8.87, and the organic matter content was reduced by 36%, 38%, 42%, 33% and 29%, respectively, indicating that increasing the proportion of urban forest litter was conducive to reducing the loss of organic matter. Due to low C/N ratio of river sediment, increasing the proportion of urban forest litter was helpful to improve the efficiency of composting. The GI of treatments I, IV and V reached 80% on day 26, 18 and 19 respectively, but the GI of treatments II and III did not reach this level until the end of composting. Considering the quality of fertilizer and efficiency of composting for large-scale production, the proportion between urban forest litter and river sediment is suitable to be set as 3：1 for production of organic fertilizer.

主 题 词：Urban forest litter River sediment Composting C/N ratio Seed germi-nation index 

学科分类：09[农学] 090101[090101] 0901[农学-植物生产类] 

D　O　I：10.16175/j.cnki.1009-4229.2017.08.016

馆 藏 号：203262401...