玉米秸秆还田可以培肥地力，平衡土壤养分。
Corn straws as fertilizers may make the soil fertile and balance the nutrients.
结果表明：与NPK处理比较，玉米秸秆还田配施低量N肥没有显著促进黑土有机碳的积累。
The results showed that maize straw returning field combined low amount N did not promote the accumulation of organic carbon significantly, as compared with NPK treatment.
本文分析了山东省昌邑市玉米秸秆还田机械化技术推而不广的原因，提出了六个方面的应对措施。
This paper analyzed the reasons of that why didn't popularize mechanization technique of maize straw giving back farmland in large area in Shandong Changyi, put forward six sides of measure.
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