Abstract:

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/hm2), 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.