不同氮磷钾肥配施对盐碱地水稻产量性状和吸肥规律的影响

采用田间小区试验方法,研究了氮磷钾肥不同配施处理对盐碱地水稻产量性状及吸肥规律的影响。试验结果表明,在轻度盐碱化稻田上,氮磷钾肥合理配施水稻产量可较不施肥处理提高95.5%,水稻吸氮量、吸磷量和吸钾量可较不施肥处理分别提高100kg/hm2、30kg/hm2和80kg/hm2。盐碱化稻田土壤供肥能力较低,氮肥分次施用是提高其利用率的重要措施,水稻种植后土壤速效磷含量常出现亏缺,因此,今后在盐碱地水稻种植中一定要注意氮肥的合理投入以及氮磷钾的合理配施,并不断加强提高磷肥有效性的研究。

Effects of Combined Application of N,P and K On Rice Yields and Regular of Absorbing Nutrients on Saline-alkaline Land

Effects of different fertilizations on rice yield characteristics and regulars of absorbing nutrients were investigated with field plot experiments on saline-alkali land. The results showed that the yield office was increased 95.5% when NPK combined application reasonably in comparison with CK on saline-alkaline land. Nitrogen, phosphorus and potassium uptake in the rice were increased 100 kg/hm~2,30 kg/hm~2 and 80 kg/hm~2 than CK, respectively. For the fertility of paddy soil salinization was less, it is important that nitrogen fertilizer repeated application for increasing rice yield and fertilizer use efficiency. The available phosphorus of soil was often decreased after rice planting, therefore, reasonable input of nitrogen fertilizer and reasonable NPK fertilizer combined application are a good measure for keeping rice yields in the future on saline-alkaline land, as well as, continue to enhance the study of the effectiveness of phosphate fertilizer.