Changing of soil organic matter in arable soil of global mollisols and its management technology
Mollisols is the important natural resources in the world that it has significant crop productivity and it is main grain production base in China. With continuous reclaiming, unreasonable management which result in water and soil erosion and fertility declining, the outstanding performance of which directly is lower soil organic matter content, which following hidden danger to local agricultural sustainable development and directly affect the national food security and ecological security. There-fore, adopting scientific and effective field management measures and set up the ecological protection mechanism on mollisols area which can prevent soil organic matter content declined. These measures not only objective demand of actual agricultural production, but also the problem of science of farmland ecology can be solved. This paper based on the international literature about mollisols in recent years especially in reference for the study of foreign black soil area of organic matter, describes the process comprehensive and evolution of mollisols organic matter, status quo and the technical measures to maintain and enhance soil organic matter in mollisols arable soil that put forward the development direction in the future.