放牧綿羊排泄物養(yǎng)分降解及其對(duì)溫室氣體排放的貢獻(xiàn).pdf

1、分類(lèi)號(hào) S812.8 U D C 504 學(xué)校代碼 10129 學(xué)號(hào)2009204050 放牧 放牧綿羊排泄物養(yǎng)分降解及其對(duì)溫室氣體 綿羊排泄物養(yǎng)分降解及其對(duì)溫室氣體排放 排放的貢獻(xiàn) 的貢獻(xiàn) The Study on Nutrient Degradation and Contribution to Greenhouse Gas Emission of Grazing Sheep Excreta 申 請(qǐng) 人：姜圓圓 學(xué)

2、科門(mén)類(lèi)：農(nóng) 學(xué) 學(xué)科專(zhuān)業(yè)：草業(yè)科學(xué) 研究方向：草地資源、生態(tài)與管理 指導(dǎo)教師：王成杰 副教授 論文提交日期：二○一二年五月 The Study on Nutrient Degradation and Contribution to Greenhouse Gas Emission of Grazing Sheep Excreta Abstract This experiment was carried out in stipa brev

3、iflora desert steppe of Inner Mongolia in 2010 and 2011. Nylon-weight loss method and static respiration chamber were used to measure nutrient degradation of grazing sheep excreta and their effect on greenhouse gas fluxe

4、s, respectively. The results were shown as follows: Summer was the main degradation period of sheep dung in the year around. The contents of dry matter (DM), organic matter (OM), crude fat (CF), neutral detergent fiber (

5、NDF), acid detergent fiber (ADF), nitrogen (N) and carbon (C) of the sheep dung in the soil (5cm) reduced significantly (p < 0.01) during the measured period, whereas degradation rates of phosphorus (P) and calcium (C

6、a) were not significant. The dynamic changes of the degraded nutrient fitted non-linear regression equation: y = y0 +a (1-e-bx). Greenhouse gases fluxes were affected (p < 0.01) by sheep excrete and sampling time duri

7、ng the measured period. Sheep excreta weakened CH4 consumption and increased CO2 emissions. Nutrient degradation of grazing sheep excreta and their contribution to greenhouse gas emission should be affected by a series o

8、f factors, which should implement further investigation. Key words：Grazing sheep；Excreta；Nutrient degradation；Greenhouse gas Directed by: Prof. WANG Chengjie Applicant for Master degree: JIANG Yuanyuan (Grassland Science