重庆低山丘陵地区水稻施肥模式的研究

采用＂3414＂平衡施肥方案,在重庆低山丘陵地区进行水稻田间试验,研究不同施肥配方对产量的影响。结果表明,高、低产田单因素效应总体呈现N〉K〉P,中产田为N〉P〉K。最佳经济施肥量为：高肥力田施纯N 7.5 kg/667 m2,P 3.0 kg/667 m2,K 3.0 kg/667m2;中肥力田为纯N 10.0 kg/667 m2,P 6.0 kg/667 m2,K 4.5 kg/667 m2;低肥力田为,纯N 12.5 kg/667 m2,P 6.0 kg/667 m2,K 4.5kg/667 m2。

Research of Rice Fertilization Model in Hilly Region of Chongqing Province

The "3414" balanced fertilization program was applied to study the influences of different fertilization formula on the yield of rice through the rice field experiments in hilly areas of Chongqing.The results show that: the overall performance of single-factor effect in the high and low output field is that: N>K>P and that in the middle output field is N>P>K.The optimum economical fertilizer rate is different: the ones in the highly fertilized field is arranged with nitrogen(N): 7.5 kg/667 m2,potassium(K): 3.0 kg/667 m2,phosphorus(P): 3.0 kg/667 m2;the ones in the middle fertilized field is arranged with nitrogen(N):10.0 kg/667 m2,potassium(K):6.0 kg/667 m2,phosphorus(P): 4.5 kg/667 m2;the ones in the poorly fertilized field is arranged with is that nitrogen(N):12.5 kg/667 m2,(N):12.5 kg/667 m2,potassium(K):6.0 kg/667 m2,phosphorus(P):4.5 kg/667 m2.