庆安县水稻高产优质氮磷钾适宜用量研究

Studies on the Optimum Rate of Fertilization for High Yield and High Quality Rice in Qing'an County

采用不完全正交设计方法,研究了庆安县水稻主产区黑土和草甸黑土水稻高产优质适宜的氮磷钾用量。试验结果表明,在中低产条件下,庆安县水稻氮磷钾适宜用量为：N 100～150 kg·hm^-2、P2O560～90 kg·hm^-2、K2O 75～125 kg·hm^-2,氮磷钾适宜比例为1.7∶1∶1.3。在高产条件下,水稻氮磷钾适宜用量为：N100～200 kg·hm^-2、P2O560～90 kg·hm^-2、K2O 75～125 kg·hm^-2,氮磷钾适宜比例为2.5∶1∶1.3。从产量和品质两个方面综合考虑,庆安县水稻施肥氮、磷、钾的适宜用量为N 100～150 kg·hm^-2,P2O560～90 kg·hm^-2,K2O 75～125 kg·hm^-2为宜,过高或过低对产量和品质均有显著的负效应。

It studied on optimum rate of nitrogen, phosphorous and potassium application on rice for high yield and high quality in black soil and meadow black soil of the main rice production region of Qing＇an county by the method of incomplete orthogonal design. The results showed that the optimum rate of nitrogen,phosphorous and potassium was N100～ 150 kg · hm^-2, P2 O560～90 kg · hm^-2 and K2O 75～125 kg · hm^-2 ,respectively,the proper ratio of N ： P2O5 ： K2O was 1. 7 ： 1 ： 1.3,under the condition of moderate to low yield level in the county, The optimum rate of nitrogen,phosphorous and potassium was N 100～200 kg · hm^-2 ,P2O5 60～90 kg · hm^-2and K2O75～125 kg · hm^-2 ,respectively, the proper ratio of N ： P2 O5 ： K2 O was 2. 5 ： 1 ： 1.3, under the condition of high yield level in the county. On comprehensive considering of the yield and quality, the optimum rate of nitrogen, phosphorous and potassium was N100 ～ 150 kg· hm^-2, P2O5 60 ～ 90 kg · hm^-2 and K2 O 75 ～ 125 kg · hm^-2 for rice,respectively,in the county. Too high or too low was negative to yield and quality of rice.