实地养分管理对寒地水稻磷钾吸收的影响

在2004、2005和2010年,采用5个粳稻品种,通过田间对比试验方法,研究实地养分管理(SSNM)对寒地水稻养分积累的影响.结果表明,与习惯施肥(FFP)相比,SSNM平均降低磷肥用量50%,虽然穗分化期磷积累量降低,但是抽穗期后各器官含磷量处理间没有差异,SSNM增加了抽穗后干物质积累,因此抽穗后磷积累量有增加趋...

Effect of site-specific nutrient management on P and K uptake of rice in cold region of northeastern China

Using five rice varieties in cold area of northeastern China in 2004,2005 and 2010,effect of site-specific nutrient management(SSNM) on nutrient accumulation of rice was studied.Field experiments of two fertilization methods,SSNM and farmer′s fertilization practice(FFP),were conducted to study their effects on P,K content of rice plant and P,K uptake.Compared with FFP,SSNM significantly decreased the average P rate by 50%(P<0.05),significantly decreased P accumulation of rice plant at panicle initiation,increased P uptake after heading period because of improving dry matter weight after heading period,and improved partial factor productivity(PFP) of P by about 100%(P<0.05);at the same time,SSNM improved K content of stems and leaves and K accumulation of rice after meiosis period,as well as increased average yield by 14.5%.The results suggested that SSNM improved P and K accumulation in the middle and later growth stages,and increased rice yield and PFP of P.