中国耕地土壤有机碳储量变化及其对粮食安全影响的模拟研究

章节摘录

　　4.5 Protect untouched arable land resources and reclaim orderly　　Wasteland suitable for farming constitutes major untouched arable land resources. Withthe acceleration of urbanization and industrialization processes in China and rapid progressin the infrastructure construction， it is necessary to substantially strengthen the protection ofwasteland suitable for farming and avoid destructive development. While maintaining the quan-tity of untouched arable land resources， more attention should be paid to the conservation of theeco-environment around the untouched arable land （Chen 2001）. We should encourage andsupport farmers and flagship enterprises， under the precondition of not degrading eco-environ-ment， to invest more in reclaiming the wasteland suitable for farming， increase input， built itinto stable and high yield cropland and incorporate it into the category of capital farmland forprotection according to law.Besides， with respect to the methods and priority for arable land protection in China， dif-ferent measures should also be adopted in line with the regional difference in land resources： As.the farmland is good in quality and high in yield in the eastern coastal region， land consolidationshould be carried forward vigorously on the basis of more effective protection of existing capitalfarmland in order to improve agro-production conditions， upgrade farmland quality and yieldand increase acreage; Through city land consolidation， intensive land use should be promotedand the pressure coming from use of farmland for non-agricultural purposes due to rapid devel-opment of regional economy and urbanization be eased. At the same time the agricultural pro-duction structure should be optimized and on the prerequisite of not damaging the topsoil， labor-intensive production and processing with advanced technology should be carried out to increasethe added value and competitiveness of farm produce.　　The middle region， featured by a large quantity of arable land， ideal sunshine and tempera-ture and good land utilization， is the basis to ensure our nation's food security. But in this re-gion a large part of farmland suffers from natural hazards including drought， flood and saliniza-tion and the medium- and low-yield land is distributed extensively. Therefore the emphasisshould be shifted from maintenance of acreage to yield. Except for key protection of high-yieldfertile farmland， comprehensive treatment of medium- and low-yield fields should be enhancedto buffer the harm of natural calamities and increase the overall production capacity of farmland（Tian et a/. 2002） .　　……

书籍目录

PrefaceQuantifying Soil Orgaruc Carbon Sequestration Potential with Modeling ApproachModeling Soil Organic Carbon Storage and Its Spatial Distribution in Cropland in ChinaEvolution of the Organic Matter Content of Flemish Agricultural SoilsAgricultural Monitoring System with Remote Sensing in ChinaA Method for Eco-enwronmental Functional Division: Taking Panyu District of Guangzhou City as an ExampleGrass Yield Estimate Study of China's Northern Farming-Pastoral Ecotone Based on the BP Neural Network MethodQuantitative Relationship Between Agro-drought and Cropland SOC as Well as Grain Production in ChinaSpatial Patterns and Effects of Cropland SOC in Quantitative Assessment of Grain Productivity in ChinaThe Effects of Different Farm Practices on the Soil Orgaruc Carbon in China ...Effects of Different Soil Management Practices on Redistribution and Loss of SOC and on Winter Wheat Yield: A Field Rainfall Simulation StudySoil Organic Carbon Changes due to Nutrient Management Practices in Dryland Maize under Reduced Tillage in ChinaEstimating the Impacts of Soil Organic Carbon Sequestration on Crop Yield and Environment in Croplands in ChinaInfluence of Reduced Tillage on Soil Organic Matter Fractions in the Surface Layer of Belgian Silty Cropland SoilsThe Effect of Reduced Tillage on Carbon Dynamics in Silt Loam Soils under a Temperate ClimateInfluence of Humic Substances on Crop Yield and Nutrient UptakeEstimated CO2 and N2O Emissions and Mitigation Measures in Typical Cropland Soils of Huang-Huai-Hai Plain in ChinaStudy on the Cultivated Land Resources, Their Protection and Food Security in ChinaA Preliminary Study on Monitoring the Soil Moisture of Winter Wheat Area in Northern China by Using ENVISAT-1/ASARResearch on Index System for Food Security Evaluation in ChinaImpacts of Low Temperature on Crop Yields in Northeast ChinaProgram for the Workshop "Simulation of Soil Organic Carbon Storage and Changes in Agricultural Cropland in China and Its Impact on Food Security"

作者简介

中国耕地土壤有机碳储量变化及其对粮食安全的影响，ISBN：9787502943776，作者：唐华俊、邱建军、等

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