不同施肥处理对小麦产量及土壤养分的影响

通过田间试验,研究了不同施肥处理对小麦产量、肥料利用率及土壤养分的影响。结果表明:氮肥是影响小麦产量的主要因素,磷、钾肥次之;氮、磷肥的回收利用率随施肥量的增加而下降,钾肥的回收利用率随施钾量的增加而呈先增加后下降的趋势;土壤全氮、有机质含量以及碳氮比均随着氮肥施用量的增加而增加,土壤有效磷和速效钾含量分别与磷肥和钾肥的施用量呈正相关。

Effects of Different Fertilization Treatments on Wheat Yield and Soil Nutrient

Through field test,we studied the effects of different fertilization treatments on wheat yield,utilization rate of fertilizer and soil nutrient.The results indicated that nitrogen fertilizer was the dominant factor affecting the yield of wheat,followed by phosphorus and potassium fertilizer.The recovery utilization rate of nitrogen and phosphate fertilizer decreased with the increase of fertilization amount,while the recovery utilization rate of potassium fertilizer increased at first and then decreased with the increase of potassium application rate.The total nitrogen content,organic matter content and ratio of carbon to nitrogen in the soil all increased with the increase of nitrogen fertilization amount.The contents of available phosphorus and available potassium in the soil were positively correlated with the application rates of phosphorus and potassium fertilizer respectively.