Analysis Of Stress Effects Of Livestock Manure Pollution On Eco-environment In China

With the acceleration of agricultural industrialization, animal husbandry industry continues to expand and manure emissions into the environment impact by livestock manure has further increased. Based on the collection of provincial, city, county from statistical yearbook, agricultural economy yearbook and other data in2000,2005,2010, stress effects of livestock manure pollution on eco-environment in China was analyzed. Main conclusions are as follows:1. The temporal and spatial distribution characteristics amount of livestock manures and pollutant emission:pig manure showed a increasing trend,with growth rate of3.9%.cattle manure and sheep manure increased from2000to2005,but decreased rapidly from2005to2010, the decline rate of cattle manure is about17.4%,sheep manure is about3.2%, there are most amount of livestock manure in Henan, Hebei, Sichuan province in2000,2005,2010.and the least amount of nitrogen and phosphorus from manure in Beijing, Tianjin, Shanghai province and other places.From2000to2010, total nitrogen, phosphorus from national livestock pollutants decreased, the nitrogen decreased9%, phosphorus decreased6.4%.there are most amount of nitrogen and phosphorus from manure in Henan, Sichuan, Hebei.and the least amount of nitrogen and phosphorus from manure in Beijing, Tianjin, Shanghai.2.Effects of resource stress:Resource stress in livestock in agricultural areas and pastoral areas is higher than the resources stress in pastoral livestock in China, grass resources stress classification results from the zoning map showed grass resources stress from serious to light as follows:the first zoing included Jiangsu, Shandong,with average stress ratio reached the highest46.96; the second zoing included Tianjin, Henan, Shanghai, Anhui, Fujian, Ningxia, with the average stress degree is15.25; the third for the other23provinces, the lower average stress is3.82; hotspot near Huabei Flatlands was relatively stable, showing a large range-Gently-intensified trend; hotspot in Northeast Plain disappeared in the2005year, the reason was caused by stress wave to make the arounding county, city, not become a hotspot region; North China Plain grass resources stress and the grass resources stress located in pastoral areas of west Tibet become serious.3. Effects of environmental stress:There was the most serious nitrogen stress of pig, cattle and sheep manure in Guangxi in2000, stress degree was2.23, the most serious phosphorus stress is in Hunan in2005, stress degree is3.002; the most serious province of nitrogen stress in Hunan in2005, stress degree is2.6, the most serious phosphorus stress in Hunan in2005, stress degree was3.61; and the most serious nitrogen stress in Hunan in2010, stress degree was2.18, the most serious phosphorus stress in Hunan, stress degree is3.11.There was the most serious water environmental stress of pig, cattle and sheep manure in Hebei In2000, the COD stress degree is2.103, BOD stress degree is7.794, NH3-N stress degree is6.562, TP stress degree is12.28, TN stress degree is16.5in2000; and the most serious water environmental stress in Tianjin in2005, COD stress degree is3.163, BOD stress degree is11.997, NH3-N stress degree is8.764, TP stress degree is18.375, TN stress degree is21.793; The most serious water environmental stress in Tianjin In 2010, COD stress degree is2.63, BOD stress degree is10.011, NH3-N stress degree is7.144, TP stress degree is15.225, TN stress degree is17.707.Livestock stress zoning map was formed using7variables (total nitrogen and phosphorus loss of arable land, to the water total nitrogen and phosphorus, ammonia nitrogen, COD, BOD) to showed that the whole area coulded be divided into3regions:Severe stress agricultural large area in the plain of North China and hills southeast, Moderate stress agricultural large area in the lower reaches in the Yellow River, Mild stress animal husbandry large area Qinghai Tibet Plateau and Tianshan Mountains and northeast Inner Mongolia;This map coulded be divided into9sub-regions:Severe grass resources stress secondary area in middle of the Beijing Hangzhou Grand Canal, Severe soil environmental stress secondary area in southeast hills. Water environmental severe stress secondary area in lower reaches in the Yellow River, Moderate grass resources stress secondary area in south of Taihang Mountain, Soil environmental moderate stress secondary area in the Yangtze River and Liaodong, Water environment moderate of stress secondary area in Henan, Shanghai, Shanxi, Mild stress secondary area of semi pastoral in Yunnan Heilongjiang, Mild stress sub district in Qinghai Tibet Plateau and Inner Mongolia plateau and north of Qilian Mountains, with stress severity decreased from first level to third level.