蚯蚓对奶牛粪物质转化与温室气体排放影响研究

发布时间：2018-01-17 20:34

本文关键词：蚯蚓对奶牛粪物质转化与温室气体排放影响研究　出处：《安徽农业大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年我国畜牧业发展迅速,畜牧业集约化和规模化水平不断提高,在此过程中产生了大量的畜禽粪便,畜禽粪便作为农业固体废弃物导致了一系列亟待解决的生态环境问题。本研究通过奶牛粪便自然堆制和蚯蚓堆制两种处理方式,探析了两种堆制方式中碳、氮和相关养分等含量的变化规律,明确了蚯蚓转化奶牛粪便适宜的接种密度,同时,开展了两种堆制方式下温室气体排放监测研究,以期从物质元素含量变化和温室气体减排两方面为适度规模化养牛场奶牛粪便资源化利用提供一定的理论依据。研究获得如下主要结果:1.蚯蚓影响奶牛粪便中碳、氮营养元素的含量,显著降低了堆制物总碳、总有机碳以及全氮含量,堆制物总碳含量由40%下降到26.1%,总有机碳含量由36.2%下降到20.4%,全氮含量由18.03g/kg下降到7.51g/kg。2.蚯蚓影响奶牛粪便堆制物中磷、钾营养元素的产量,全磷含量逐渐升高,由5.02g/kg上升到11.25g/kg;全钾含量逐渐降低,由5.49g/kg下降到4.91g/kg。3.蚯蚓影响奶牛粪便堆制物中氮、磷的速效性,速效氮和速效磷占全氮和全磷的百分比均逐渐升高,分别由6.5%上升到11.1%,34.8%上升到41%。4.蚯蚓在奶牛粪便中的接种密度以蚯蚓重量与奶牛粪重量比1:40为宜。5.奶牛粪便蚯蚓堆制与自然堆制相比,前者降低了温室气体CO2排放当量。温室气体排放定位监测试验中,牛粪自然堆制CO2排放当量为84.27kg/t,牛粪蚯蚓堆制CO2排放当量为71.87kg/t;温室气体排放模拟监测试验中,牛粪自然堆制CO2排放当量为11.11kg/t,牛粪蚯蚓堆制CO2排放当量为5.97kg/t。由此认为,与自然堆制相比,牛粪蚯蚓堆制加快了堆制物矿化速率,提高了堆制物速效养分含量,降低了堆制物温室气体排放当量。
[Abstract]:In recent years, animal husbandry in China has developed rapidly, and the level of intensive and large-scale animal husbandry has been continuously improved. In this process, a large amount of livestock and poultry manure has been produced. Livestock and poultry feces as agricultural solid waste has led to a series of ecological and environmental problems to be solved. The changes of nitrogen and related nutrients determined the suitable inoculation density of earthworm to transform cow feces. At the same time, the greenhouse gas emission monitoring was carried out under two kinds of stacking methods. In order to provide a certain theoretical basis for the appropriate utilization of cow dung from the two aspects of material element content change and greenhouse gas emission reduction, the main results of the study are as follows:. 1. Earthworms affect carbon in cow feces. The total carbon, total organic carbon and total nitrogen content of the compost decreased significantly, and the total carbon content of the compost decreased from 40% to 26.1%. The total organic carbon content decreased from 36.2% to 20.4 and the total nitrogen content decreased from 18.03 g / kg to 7.51 g / kg 路2.Earthworm affected phosphorus in cow manure compost. The yield of potassium and the total phosphorus content increased from 5.02 g / kg to 11.25 g / kg. Total potassium content decreased gradually from 5.49g / kg to 4.91g / kg 路3.Earthworm affected the availability of nitrogen and phosphorus in cow fecal compost. The percentage of available nitrogen and phosphorus in total nitrogen and phosphorus increased gradually, from 6.5% to 11.1%, respectively. The inoculation density of earthworm in cow feces was better than that of milk cow manure at 1:40. The former reduced the CO2 emission equivalent of greenhouse gas. In the greenhouse gas emission location-monitoring test, the equivalent of CO2 emission from cow manure natural heap was 84.27 kg / t. The equivalent of CO2 emission from earthworm pile was 71.87 kg / t; In the greenhouse gas emission simulation monitoring experiment, the equivalent of CO2 emission from natural pile of cow manure was 11.11 kg / t, and the equivalent of CO2 emission from earthworm pile from cow dung was 5.97 kg / t. Compared with the natural composting, the cow manure earthworm composting accelerated the mineralization rate of the compost, increased the available nutrient content of the compost, and reduced the equivalent of greenhouse gas emission from the compost.
【学位授予单位】：安徽农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S141.4;X713

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