Conservation tillage: a promosing solution for rebuilding fertile a horizons of black soils in Northeast China
Black soils, originally characterized by a deep, dark A -horizon (Mollic Epipe don), are widespread in the Northeast Plain of China and have been one of the most fertile agricultural resources in the country. However, more than a half -century of intensified management with less care has greatly degraded its productivity, mainly with the loss of the dark -coloured A -horizon by erosion and the loss of soil organic matter content by less input of organic amendments relative to mineralization. This has severely jeopardized the productivity of these soils in China. Great efforts have been made by the societies to maintain and/or to restore the productivity of these soils in the region. Among many alternatives, conservation tillage has demonstrated its promising role to eliminate further decline of the fertility of Black soils and to increase farmers income and to protect environment. The objective of this paper is to present the impacts of conservation tillage on the contents and distribution of soil organic carbon (SOC) based on the studies conducted on some mollic soils in China and Canada.
black soils mollisols conservation tillage no - tillage
Xueming Yang Xiaoping Zhang Xudong Zhang Jingyi Yang
Agriculture and Agri -Food Canada, Harrow, Ontario, Canada Key Laborotary of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese A Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
国际会议
哈尔滨
英文
212-213
2010-07-13（万方平台首次上网日期，不代表论文的发表时间）