闽北水稻土最佳养分投入模式研究

Study on optima fertilization models of paddy soil in northern fujian

采用对比试验研究红壤项目区内水田最佳养分投入模式，经３年试验结果表明：在我省目前施肥水平下，三要素肥效Ｎ＞Ｋ＞Ｐ（早稻）、Ｋ＞Ｎ＞Ｐ（晚稻），氮肥在中低肥力田块上增产效果较高肥力田块好；水稻氮肥最佳用量为１５０ｋｇ／ｈｍ２（纯Ｎ），尤溪县水稻施肥三要素比例以１∶０．５∶０．５，浦城县则为１～１．２５∶０．５∶０．７５。配施有机肥能够提高土壤有机质含量。

Three years'( 1995-1997) location field experiments were carried out to study the optima fertilization models of paddy soils The results showed that the nutrient efficiency were N>K>P for early rice and K>N >P for late rice Nitrogen fertilizer efficiency in low and middle fertility paddy soils was higher than that in high fertility paddy soil Rice optimum nitrogen dose was 150 kg N per hectare and the suitable ratios of N∶P 2O 5∶K 2O were 1∶0 5∶0 5 for Youxi county and 1-1 25∶0 5∶0 75 for Pucheng county respectively Combined organic and chemical fertilizer dressing had positive effect on improving soil fertility