土壤有机质与施有机肥对产量的影响

根据永济等４县（市）土壤有机质与作物产量及施用有机肥与土壤有机质含量均呈正相关趋势，说明山西省土壤有机质近几年虽然有所提高，但与全国相比仍属中等偏下水平，应重视施用有机肥，在培肥地力上，化肥还不能代替有机肥。

Effect of Soil Organic Matter and Manure Fertilization on Crop Yield

Soil organic matter is the leading role factor in soil fertility.It iS main resoure of crop nutrition and can improve the soil to creat a good condition for crop growth.Based on Inrestigation in Yongji and other four counties,the crops yield had a remarkble positive interrelation with soil organic matter and manure application.The content of organic matter increases in the soil of Shanxi recently.It is still at the low level.The chemical fertilizer can not replace the manure in soil fertility improvement.