棕壤土区施肥参数对冬小麦产量与肥料利用率的影响

在招远市6个乡镇进行了冬小麦施肥参数试验。结果表明：磷肥增产效果与土壤有效磷含量密切相关,土壤有效磷达到20mg/kg,磷素属高肥力水平。土壤速效钾含量越低,施肥增产效果越显著,土壤有效钾含量〈80 mg/kg,施用钾肥的经济效益最高。不同土壤肥力对产量和氮磷钾肥农学利用率的影响的试验结果表明,高、中、低产麦田全肥区的产量最高,并且全肥区的氮磷钾肥的农学利用率高出缺素区,因此,要提高肥料的农学利用率,必须氮磷钾配合施用。

Effect of Fertilization Parameters on Winter Wheat Yields and Fertilizer Utilization Efficiency in Brown Soil Zone

Fertilizer parameter experiment of winter wheat was carried out in six towns of Zhaoyuan city.Results indicated that yield increase effect of phosphate fertilizer was tightly related to Olsen-P content.When Olsen-P content reached 20 mg/kg,phosphorus belonged to high fertility level.Wheat yield increased with the decrease of fast-acting potassium.When the content of fast-acting potassium was less than 80 mg/kg,economic benefit of potassium fertilization was the highest.In high,middle and low yield field,wheat yield of district-wide fertilizer field was the highest.And its N,P and K fertilizer utilization efficiency was higher than that in district-lack fertilizer field.Therefore,N,P and K fertilizer should be applied together in order to improve agricultural utilization efficiency of the fertilizer.