Impact of Farmland Wind Erosion on Sand Strom in Northern China
The soil erosion by wind under conservational and traditional tillage systems was investigated in a 3 years period by means of monitoring field sand losses, wind tunnel simulations and marking pole experiments. The results of the study show that the annual amount of the soil eroded by wind was 6 billion tons in northern China, and the losses of N, P, K and organic matter were 6.67, 1.00, 122.00 and 89.35million tons, respectively. Among them, the annual soil wind erosion in Beijing was 18 million tons. Compared with tradition tillage, conservation tillage including no till with crop stubble and straw coverage reduced 40％ of wind erosion. In order to control sand storms in China, more emphasis should be given to conservation tillage due to its great effectiveness in reducing wind erosion from farmland which is a source of dust, in addition to planting more trees and grasses.
sand storms resource of dust contribution conservation tillage farmland
Li Hongwen Gao Huanwen Wang Xiaoyan Feng Xiaojin Li Wenying
China Agricultural University, Conservation Tillage Research Centre of MOA, Beijing, PRC
国际会议
2006年中—加保护性耕作论坛(China-Canada Conservation Agriculture Forum)
北京
英文
73-82
2006-09-21（万方平台首次上网日期，不代表论文的发表时间）