摘要
为了研究不同C/N比值在不同温度条件下牛粪堆肥30 d时的全量养分和有机质的含量情况,提出了以新鲜牛粪和苜蓿秸秆混合物为堆料,在添加1%的生物腐熟剂的基础上,对堆肥温度及C/N比进行调控,并进行交叉实验。结果表明,(1)采用培养箱进行好氧发酵时,在温度为30℃和45℃的环境下堆肥最佳,温度过低或过高都会影响堆肥。(2)牛粪高温好氧堆肥时,添加一定比例的苜蓿秸秆可以调节堆料的C/N比值、含水量,缩短堆肥时间,其中牛粪与秸秆比例为1∶1混合堆肥效果较好。(3)堆肥30 d时,堆料的TN、TP和TK含量较堆肥初期都有所增加,有机质含量有所降低是因为矿化和释放养分造成的,且各含量均符合国家有机肥标准。
In order to study the contents of total amount of nutrients and the organic matter in cow dung af- ter composting for 30 days under different C/N ratios and varied temperature conditions, the mixture of fresh cow dung and alfalfa straw were taken as the composting materials. On the basis of adding 1% of biological decompo- sition agent, a crossover trial was made while the temperature and the C/N ratio of the compost could be changed and controlled. Results showed that, firstly, when using the incubator for aerobic fermentation, eomposting reached the best effect with an environmental temperature of 30~C or 45~C , while over-low or over-high tempera- tures could affect the composting. Secondly, when the cow dung was in aerobic eomposting process at high tem- perature, adding a certain proportion of alfalfa straw could adjust the C/N ratio, change the water content of eomposting material, and shorten the composting time. A 1：1 ratio of cow dung to straw of the mixture could reach the best result. Thirdly, after composting for 30 days, all the contents of TN, TP and TK in the compost increased when comparing with the beginning, however, organic matter content decreased because of mineraliza- tion and nutrients release. Each content of there nutritions could meet the national standard for organic fertilizer.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第1期334-340,共7页
Chinese Journal of Environmental Engineering
基金
中国科学院战略性先导科技专项(XDA05050504)
土壤学新疆自治区重点学科资助
关键词
温度
秸秆添加比例
好氧堆肥
牛粪
C
N
temperature
straw adding ratio
aerobic compost
cow dung
C/N
