评定养猪经济效益的方法及降低养猪成本的途径

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

摘要:

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。

Abstract:

The results of pot experiments showed:that fertilizer N had extremely significant effect on the rice yield and the effect of K fertilization 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, available k, and alkline soluble N were related significently with the yieldof rice and the growth rate of rice. It is feasible that the application of N and K will be defermined by the means of alkline soluble-N and available K levels in soils.