水稻土主要农化指标与水稻产量相关性的初步研究

盆栽试验结果表明,水稻施氮效果极显著,在施氮或氮瞵基础上施钾效果显著,在施氮或氮钾基础上施磷效果不明显。土壤有机质、全氮、碱解氮、速效钾含量与水稻产量及施肥增产率呈显著或极显著相关,通过土嚷碱解氮和速效钾的测定,确定水稻是否施用氮肥和钾肥是可行的。

THE PRELIMINARY STUDY ON THE CORRELA TION OF MAIN AGRO—CHEMISTRY PROPERTIES AND THE RICE YIELD IN PADDY SOILS

The results of pot experiments showed:that fertilizer N had extremely significant effect on the rice yield and the effect of K fertiliza-tion combinod with N or N and P applications was significant too,but no effect of P fertilization with the N or N and K application.The study also indicated that organic matter content,total N,avai-lable k,and alkline soluble N were related significently with the yieldof rice and the growth rate of rice.It is feasible that the applica-tion of N and K will be defermined by the means of alkline soluble-N and available K levels in soils.