灵石县旱地玉米肥料利用率的研究

为了能够建立当地的施肥指标体系，通过“3414”常规五处理的试验研究，结果显示在灵石的淡褐土上，投肥的肥料利用率呈现出氮肥的利用率与土壤中的有效磷含量（小于20 mg/kg），碱解氮的校正系数（小于1），有效磷的校正系数（小于1.2），速效钾的校正系数（小于0.32），投磷量（大于105 kg/hm2）、投钾量出以及缺磷区的相对产量（小于58%）呈正相关关系；相反则呈负相关关系。磷肥利用率与碱解氮、有效磷，氮肥、磷肥和钾肥的投入量、有效磷的校正系数（大于1.4）及缺磷区的相对产量皆呈负相关关系；而与有效磷的校正系数（小于1.4）是正相关关系。钾肥的利用率与速效钾的校正系数及缺钾区的相对产量（小于75%）是正相关关系；与速效钾及缺钾区的相对产量（大于75%）呈负相关关系。同时亦可看出中等级肥力的旱地（条甲地）缺钾不明显。

Researched for Utilized Rate Fertilizer on Dry Maize of Lingshi

In order to set up the target system of fertilizer,through the experiment of five treatments with ’ 3414 ’,the natural law are demonstrated on the weak brown earth of Lingshi County,it demonstrated in the utilized rate fertilizer,there were positive relative relationship between utilized rate nitrogen with available phosphorus（〈20 mg/kg） in the soil,correlation coefficient of quick results nitrogen（〈1）,correlation coefficient of available phosphorus（〈1.2）,correlation coefficient of quick results kaliums（〈0.32）,phosphoric fertilizer（〉 105 kg/hm 2）,kaliums fertilizer and relative output of phosphorus should be lacked（〈58%）;reverses were negative relative relationship.positive relative relationship between utilized rate phosphorus fertilizer with correlation coefficient of phosphorus（〉1.4）;but it was negative relative relationship between utilized rate phosphorus fertilizer with quick available nitrogen,available phosphorus,nitric/phosphoric/potassic fertilizer,correlation coefficient of phosphorus（〉1.4） and relative output of phosphorus should be lacked.Also positive relative relationship between utilized rate potassic fertilizer with correlation coefficient of quick results kaliums and relative output of kaliums be lacked（〈75%）;reverses were negative relative relationship.Besides it had been understudied the kaliums were not lacked in the farm of middle fertility.