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published in(发表于) 2014/12/11 9:18:00
Excessive application of fertilizer is eroded soil in grain-producing areas in Northeast China

　　Hong Kong's South China Morning Post, December 9 article, topic: excessive application of fertilizers is the valuable topsoil eroded Northeast breadbasket , experts say, excessive application of fertilizer is a serious threat to crops in Northeast China, is one of China's most important grain-producing areas in the region.

It was reported that the destruction of the fertile layer of organic matter in black soil in Northeast China, and degradation of thickness rate of 1 cm a year. "Formed 300 million years for 1 meter thick black soil, and the degradation speed is now 1 year and 1 cm", and Chen Wenfu, a professor at Shenyang Agricultural University said, "If you don't pay attention to improve the quality of cultivated land and sustainable agriculture will be at serious risk. ”

Land degradation and poor infrastructure are restricting grain output in Northeast China. By Heiji, Liao composed of three provinces in the region, accounting for 20% of the 16% of arable land, grain production in the Mainland. Fertile black soil organic matter contains 3% to 10%, is the ideal soil for planting crops such as rice and corn.

Professor Chen said excessive application of fertilizers in the past decades means that the Jilin black earth soil organic matter content had dropped from 8% in early days to today's 2%, Heilongjiang's rural soil also has the same problem. Soil fertility because of mono-crop cultivation, planting one or two crops on the same piece of land has been degraded and excessive application of fertilizers. Dilapidated irrigation facilities and poor drainage, but also resulted in more vulnerable to natural disasters, the grain harvest.

(Original title: Hong Kong media: too much fertilizer is eroding topsoil of Northeast breadbasket)

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