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Université du Ningxia (2017)

Study on Desert Grassland Sustainable Use Model Based on the Breeding Balance

米楠;

Titre : Study on Desert Grassland Sustainable Use Model Based on the Breeding Balance

Auteur : 米楠;

Grade : Doctoral Dissertation 2017

Université : Université du Ningxia

Résumé
Desert grassland has a great of significance about maintain to water and soil conservation of inland areas in our country.Grassland degradation which brings deterioration of the grassland ecological environment,the grass biological yield and grassland use of performance degradation,directly leading to a series of serious consequences such as redction of output in local animal husbandry production,and made negative influences about the sustainable development of farming-pastoral transitional zone.Research on desert grassland breeding balance problems and basically realize the sustainable utilization of grassland,not only limited natural grassland,but also look to all resources as a whole and even in the future.Under the background of the modem agriculture,looking for natural grassland moderate use of the "moderate",which made the artificial grassland,cultivated land,forest land and other resources together,to realize the sustainable utilization of grassland.To ensure that our desert grassland animal husbandry economy benefit and the regional ecological security.This study,based on production optimization theory,untie vegetation index(NDVI),typical farmers breeding balance,resource allocation and the typical village as the breakthrough point,to begin the research on breeding resource allocation and breeding of balance from farmers scale,rural scale and county scale and the relationship between them.Then,presenting some managements for grassland ecosystem and sustainable utilization of grassland which provide a scientific basis from operation,management and policy level to obtain more breeding cognitive balance.According to the research in each village domain resource heterogeneity and breeding balance characteristics,put forward the mode of sustainable utilization of desert grassland,which to complete the county desert grassland sustainable utilization model and the solution,for the government to formulate scientific of grassland utilization and breeding industry,providing a scientific basis for developing policies and programs.The results were as followed :(1)In this research,we analyze MODIS,TM and GF-1 data through ENVI and GIS software.The results shows:in 2006-2015,the existing NDVI overall showed a trend of increase and water resource is the important influencing factor.Significantly better than the existing vegetation coverage in the east in the western region in Yanchi,the main is given priority to with low coverage and low coverage and coverage.The linear relationship between the NDVI value and measured sample is:y=795.25x-36.811,R2=0.6808。Using this model of existing grassland yield,the average yield is 1530.57 kg/hm2 and total yield is 6228.73 t.The existing grassland area is 406955 hm2,including grade 5 grassland area is 248006.67 hm2,4 levels of grassland area is 140865.14 hm2,level 3 grassland area is 11197.25 hm2,level 2 grassland area is 3731.67 hm2,level 1 grassland area is 3154.27 hm2.The each proportion is 61%,35%,3%1%and 1%.Irrigation agriculture area,the study area is divided into three categories of dry-land farming and animal husbandry area,and grassland farming and animal husbandry area,and select research domain.(2)Using participatory evaluation method,field survey method combined with NDVI grassland yield estimation model and the inversion results of across from the labor force structure,land utilization,yield and grazing capacity etc.Comprehensive analysis of the three typical village and village farmers scale domains breeding balance and characteristics of the scale.The results show that on the scale of the village,the village has a large area of water,with high capacity and no overloading.In the village of high sandhouse,which is mainly in the upland of the grassland,the land of the grassland is low in capacity and in the long run,the land is degraded seriously.In the village of Wan jigou,which is dominated by agriculture and forestry,the local level of productivity is at a moderate level,and in the mode of coordinated and coordinated utilization,it is under the condition of not being overloaded.On the scale of the farmer,the scale of the farmer’s farming depends on the size of the water and the overall utilization of the resources.(3)Desert grassland sustainable utilization is lack of labor in the study area,water shortages,mutton price decline and policy across the board.For the county scale,on the premise of ecological protection,prevent grassland degradation,study more than 4levels of natural grassland in the area is suitable for the development and utilization of large area,forest land development and utilization of up to 40%.Using the multi-objective programming method,combining with different types of village domain resources endowment,have desert grassland sustainable utilization mode and the way of differentiation.Sustainable utilization mode for irrigation farming irrigation farming and animal husbandry-straw feed-Tibet lamb barn feeding mode,the sustainable utilization of grassland farming and animal husbandry mode for grassland,natural grass,grazing,animal husbandry farming and animal husbandry sustainable utilization mode for agriculture,forestry and grass-Tibet lamb barn feeding and grazing,fanning composite pattern.

Mots clés : desert grassland; sustainable utilization; model;

Présentation (CNKI)

Page publiée le 16 janvier 2018