摘要
东北黑土区是我国重要的商品粮生产基地,但随着黑土资源的不断开垦,土壤退化问题日益加剧。详述了近几十年来黑土资源质量的变化特征,分析了黑土质量退化的各种自然与人为因素。通过分析得知,东北农田黑土总的变化趋势是黑土层变薄,有机质含量下降,土壤养分平衡失调,物理性状恶化,土地生产力降低,大部分高产农田变成中、低产田,严重制约了东北及我国粮食生产和经济的可持续发展。图1,表3,参19。
The black soil region in northeast China has become one of the most important regions for cereal grain production, while soil degradation is increasingly serious with the gradual reclamation of black soil resource.This paper details the change characters of black soil quality,and analyses the natural and artificial factors of black soil degradation.The analytical results showed that the total change trend of black soil in northeast farmland was that the black soil layer attenuated, the quantity of organic matter decreased, and the nutrient balance of soil maladjusted. At the mean while soil physical properties of black soil deteriorated, the productivity reduced, most of high yield farmland became mid, low yield farmland, which heavily restricted the foodstuff production and the economic sustainable development of the northeast, even for the whole country.
出处
《农业系统科学与综合研究》
CSCD
2005年第3期182-184,189,共4页
System Sciemces and Comprehensive Studies In Agriculture
基金
中国科学院知识创新工程重要方向项目(KZCX2-SW-416)资助.
关键词
黑土质量
黑土退化
土壤侵蚀
black soil quality
black soil degradation
soil erosion
