涪陵水稻氮磷钾肥最佳施用量研究

Study on the Optimum Fertilizer Amount for Rice Cultivation in Fuling District

在重庆市涪陵区马武镇惠民村进行水稻"3414"肥料田间试验研究,采用三元二次施肥模型、二元二次施肥模型、一元一次施肥模型分别对试验结果进行拟合,结果表明:采用三元二次模型计算的氮、钾肥最佳施肥量偏高,由磷、钾二元二次肥料效应模型得到的磷肥最佳施肥量偏高,综合考虑得出水稻的最佳施肥量为每公顷施N 200 kg,P2O590 kg,K2O 120 kg;N,P2O5,K2O施用比例为1∶0.45∶0.6.

In order to obtain the optimum fertilizing rates of N,P2O5 and K2O for rice,a field experiment of fertilizer on rice was conducted with the ＂3414＂design in Huimin Village,Mawu Town,Fuling District of Chongqing City.The resulting data was simulated by three-factor,two-factor and one-factor models.The N and K2O rates recommended by three-factor model simulation were too high,and P2O5 rate recommended by two-factor model simulation was too high.Based on an analysis of the results obtained in this study,the following fertilizer rates were recommended： N 200 kg·ha-1,P2O5 90 kg·ha-1 and K2O 120 kg·ha-1,with an N∶P2O5∶K2O ratio of 1∶45∶0.6.