武宣县早稻肥料利用率试验初报

Preliminary Study on Fertilizer Utilization Rate of Early Season Rice in Wuxuan County

【目的】探索当地洪积潴育沙土田水稻施肥规律及验证肥料利用率参数,更新县域测土配方施肥专家系统数据库,为洪积潴育沙土田进行配方施肥提供技术参考。【方法】开展早稻肥料利用率田间试验,研究在测土配方施肥技术基础上的肥料利用率。【结果】本试验条件下,氮肥利用率为31.05%,磷肥利用率为14.46%,钾肥利用率为32.63%;地力产量为297kg/667m^2,产量相对较高,地力水平较高;土壤供肥量每667m^2为N 6.69kg、P2O5 3.27kg、K2O 8.92kg,土壤氮为低水平、磷为中等偏高水平、钾为中水平。【结论】洪积潴育沙土田每667m^2水稻产量为450kg时,建议每667m^2配方施肥量为N 10kg、P2O5 3.5kg、K2O 8kg较合适。

【Objective】In order to provide technical reference for formula fertilization in alluvial sandy soil field, this paper explores the rule of rice fertilization and validates fertilizer utilization parameters, and update the database of the expert system of soil formula fertilization in the county.【Method】The fertilizer utilization rate of early season rice was studied by field experiment.Study on the fertilizer utilization rate based on the technique of soil-measuring formula fertilization.【Result】Under the conditions of this experiment, the utilization rate of nitrogen fertilizer was 31.05%, the utilization rate of phosphorus fertilizer was 14.46%, the utilization rate of potassium fertilizer was 32.63%, the yield of ground force was 297 kg/667 m^2,the yield was relatively high, the level of ground force was relatively excellent, and the amount of soil fertilizer supply per 667 m^2 was as follows: N for 6.69 kg, P2O5 for 3.27 kg, K2O for 8.92 kg, which means the level of soil nitrogen is low, phosphorus moderately high and potassium medium.【Conclusion】When the yield of rice is 450 kg per 667 m^2, it is recommended that the amount of fertilizer per 667 m^2 be N 10 kg、P2O5 3.5 kg,K2O 8 kg more appropriate.