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F-157 土业园地 (第157期) 2012.6.11
Field for Artificial Soil TechnologyAST(№157)
作者:李鹏飞 AuthorLi Pengfei June 11, 2012
My Web:www.tuyelt.com Telephone Number:13043864167

世界的土地质量
World land quality

    

    全世界每年的水土流失总量大约是250亿吨。土地沙化日趋严重,由于机械化耕种和使用农药化肥,土地污染上升和土地质量下降。但是,主要农业资源大国,如巴西、美国和俄国土地质量尚好,欧美土壤中有机质含量保持在2.5-4%,巴西和俄国基本上不发生沙尘暴,美国的沙尘暴其强度比50年代也弱得多,所以土地沙化的速度也相对较弱。

 

世界的土地质量
World land quality

Soil erosion in the world is about 25 billions tons each year. Because of land to be deserted serious day by day and plowing by machine and using pesticide and chemical fertilizer which causes land pollution and lowering land quality. But their land quality of mainly agricultural countries such as Brazil, US and Russia is still good, in Europe and America organic content in soil keeps 2.5-4%, sandstorm in Brazil and Russia don’t almost happen, American sandstorm is going weakly since 1950s, so land desertification is being weakly compare with us.(to be proofread)

 
 
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