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Ⅱ.Factors Affecting Ecological Security in CGG Areas
Ⅱ.Factors Affecting Ecological Security in CGG Areas
报告字数：78746字
报告页数：38页
摘要：本文简要分析影响粮食主产区生态安全的因素。从施用结构、施用量等方面阐述化肥、农药对生态环境和农业发展造成的长期负面影响；从水资源过度消耗、过度抽取地下水、地下水位下降等问题入手分析水资源对粮食安全的影响；分析气候变化影响对农业生产的制约与促进作用；阐述植树造林计划、农田防护林和林粮间作等对粮食主产区的影响；简述耕地污染对粮食安全造成的损害。
文章目录
- 1.Chemical Fertilizers
- 1.1 Overview
- 1.2 Fertilizers application structure
- 1.3 Over time change in the amount of fertilizers used for cereal production
- 2.Agrochemical Pesticides
- 2.1 Excessive use of chemical pesticides and challenges
- 2.2 Pesticides application in China
- 2.3 Main issues related to pesticides application in food production
- 2.4 Difference in pesticides application between China and other developed countries
- 3.Water Resources
- 3.1 Excessive consumption of water resources and challenges
- 3.2 Grain production in most CGG provinces depends on groundwater
- 3.3 Analyses of the causes of excessive use of groundwater in North China
- 4.Climate Change
- 4.1 Positive impacts of climate change on grain production
- 4.2 Negative impacts of climate change on grain production
- 5.Afforestation Protection Forests
- 5.1 Recent reforestation efforts and ecological security in CGG areas
- 5.2 Major reasons for the success of afforestation programs in China
- 5.3 Current issues affecting forestry-related ecological security benefits
- 5.4 China experience with farmland protection forest and tree-crop intercropping
- 5.5 Benefits from farmland protection forests and tree-crop intercropping
- 5.6 Issues affecting the conservation farmland protection forests in CGG areas
- 6.Farmland
- 6.1 Average level of pollution of cultivated land
- 6.2 Diminution of the black soil layer in Northeast China
- 6.3 Heavy metal pollution
- 6.4 Other factors affecting farmland security
