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采用座标公里网监测系统的方法对山西永济各个耕层土壤类型的养分状况进行了动态监测和评价,发现1988年永济耕层土壤的全氮量和速氮量较1983年均有显著增加,这与近年来氮肥投入量逐年增加有关;而土壤速磷量和速钾量在五年来未发生明显增减,说明磷、钾的投入与消耗处于平衡状态,个别地块略有减少;土壤有机质的增减尚不明显,因为这需要较长时间才能看出变化。
The method of coordinate kilometer net monitoring system was used to dynamically monitor and evaluate the nutrient status of soil types in all tiller layers in Yongji, Shanxi province. It was found that the total nitrogen and nitrogen rates of topsoil in Yongji County in 1988 were significantly higher than those in 1983 Increase, which is related to the increase of input of nitrogenous fertilizers in recent years. However, the amount of phosphorus and potassium in soil did not increase or decrease significantly in five years, indicating that the input and consumption of phosphorus and potassium are in balance and the individual plots slightly decrease. Changes in soil organic matter is not obvious, because it takes a long time to see changes.