Dynamic Change Of Famland And Grain Production

Tibet is the main position of the entire Tibetan plateau, known as the "roof of the world," said. Cold dryweather in Tibet, located at an average altitude of4000m above positions are, covers an area of1,202,230km2, accounting for the total area of our territory,1/8, but mostly iceberg snowy, alpine desert. Tibetpeculiar geographical conditions constitute the natural pastures and uncultivated land is not used more, butless woodland and farmland features. Tibet’s ecological environment is fragile, low level of socialproduction, food production and self-sufficiency of low and unstable conditions become one of theimportant factors affecting the socio-economic development. Research arable land and food productionsituation in Tibet spatial distribution and dynamics of the local land resources development, science andrational decision-making crop layout policy to develop food production has important practical significance.In this paper, based on the information of cultivated land resources and temporal changes in foodproduction situation in Tibet to study the current changes in farmland and food production trend and patternof variation to identify changes and grain yield per unit area of arable land for food production changes inthe contribution for the future to further improve self-sufficiency in food production and the situation inTibet, stabilize grain production systems, as well as Tibet, farmland protection and food productiondecisions contribute.In this paper, according to the Office of Tibet’s farming and related information "Statistical Yearbook of theTibet Autonomous Region," on the use Excel2003, Spss17.0software tools for analysis, and the useExcel2003draw maps. The use of comparative analysis, dynamic analysis and comprehensive assessmentof Cultivated Land Resources and temporal changes in food production situation in Tibet to study thecurrent changes in farmland and food production trend and pattern, to identify changes in arable land andgrain yield per unit change on food production contribution changes law, improve food production andself-sufficiency status of Tibet, stabilize grain production system. Provide reliable information for theprotection of Tibet’s existing arable land, increase food production.Statistical analysis of the results of the use of integrated arable land and food production in Tibet to studythe dynamic changes of note:①grain cultivated area in Tibet since2003showed overall growth trend,but the growth is relatively slow, the different periods of arable land changes exhibited rapid growth-slowdecrease-slow growth mode, and in the geographical distribution of farmland features more obviousspatial differences, but Xigaze arable land remains the largest, Ali arable land has been minimal, whileother areas are small when big performance out of the situation.②9-year downward trend in the Tibetanarea sown to grain, grain yields were increased volatility, but the downward trend in grain output. Grainoutput was positively correlated with grain acreage into a significant reduction in acreage due to higheryields offset the effects of total grain production, making the appearance of grain output was negativelycorrelated with grain yield and total crop area and yield was significantly negatively related. DescriptionTibet despite increased grain yield, but reduced plantings too fast, the existing level of yields is not enoughto compensate for the plantings to reduce the negative impact on the total grain production.③on theimpact of climate on production, with the main crops of barley and wheat production potential light mild climate in Tibet, although the yield space has been reduced, but the value is still high yield space,suggesting that climate factors such as temperature and precipitation The current limit is not the mostimportant factor in improving yields, an important factor in reducing arable land and significantly improveyields is guaranteed Tibet’s total grain production due to lower demand.④Tibetan food self-sufficiencyrate has been declining in recent years, the current per capita share of grain production for food305.18kg,from food and clothing, and food standards wealthy well-off life (according to the national standard ofliving per capita food consumption) is still lack of food per capita94.83kg,194.82kg and294.82kg.Existing acreage and subsistence-based production, to reach food and clothing, a well-off and wealthy life,Tibet needs to improve yields an average of about100kg/hm2,200kg/hm2,300kg/hm2.