Livestock Growth Effect On The Spread Of Desert

In recent years, the desertification is becoming a global one of the major problems in the fieldof ecological environment and social economy, increasingly attracted wide attention of theinternational community. As a main component of land degradation and desertification are aserious threat to our country the northern area of ecological environment and the sustainabledevelopment of social economy. Years of desertification research results show that the semi-aridgrasslands and oasis in continental river basin in arid desert grassland animal husbandry area andthe area is the main distribution area of desertification land in north China; In pastoral areas whenthe grassland animal husbandry areas appear serious overload too many cattle, pasture, excessivetrampled and eating surface nudity area caused the pastoral areas, pastoral areas will be degradedpastures, trend of desertification phenomenon, so overloaded is also one of the main causes ofland desertification. According to the relevant information is xinjiang oasis in the field due to therecent30years the rapid increase of the number of livestock grazing areas, meadows appearedoverload phenomenon is relatively serious, nearly27%of the grassland appear seriousdegeneration and desertification phenomenon, caused the wide attention from the desertresearchers attach great importance to and, choose the region as the study area, this paper studieslivestock growth degree of influence on the spread of deserts.This paper studied the nature of grassland, animal husbandry, the desert, and the relationshipbetween sparse vegetation and land resource degradation,considering the effects of animalhusbandry and overload of desertification, according to the principle of mathematical physicsequations, livestock on desertification influence model is put forward, and the qualitative analysisof the model and its numerical experiment is given. According to theoretical analysis andnumerical experiment shows that this model is put forward that the prediction results ofdesertification in north China with the actual monitoring results will be more close, predict theresults will be more accurate and reliable. Through a qualitative analysis of the model, the resultsshow that the bearing of animal husbandry and grassland ecosystem threshold, when overgrazesmaller, time is short, animal husbandry will not result the spread of desertification; Whenovergraze large and persistent overload, exceeds the threshold, the animal husbandry exacerbatedthe spread of deserts; The valve related to the area and the local ecological environment. So thegrassland ecological system in a certain range has the ability of anti-jamming, but can also occur,the phenomenon of the environmental quality in reverse. In this paper, with the aid of remotesensing image processing, the prediction of the oasis in the desert dynamic changes of Yutiancountry numerical experiment, the result showed that:1) during1989-2000,the area ofdesertification land area showed a trend of decrease, but2000years later, the desertification landarea began to increased, in recent years, and in the next few years is still the desertificationdynamic change of the biggest period;2) when animal husbandry reach more than43%, theanimal husbandry is increasing the spread of desertification, desertification is the dominant factor.This paper consists five sections.In section1: introduction, mainly introduced the research background, the goal of this paperand the research status of desertification at home and abroad and progress; In section2: the study area, the study area are mainly introduced general situation and relateddata;In section3: The third section is estimating grazing capacity and regional theory grazingcapacity, model of qualitative analysis and numerical experiment;In section4: water reducing effect on vegetation degradation;In section5: conclusion...