再生稻头季和中稻肥料利用率的比较与应用研究

为研究再生稻头季、中稻的施肥效应，比较二者的异同点，探讨通过栽培措施提高水稻肥料利用率的技术途径，进行再生稻头季和中稻肥料利用率比较试验。结果表明：再生稻头季比中稻氮磷钾吸收利用率分别提高15.1、6.1、27.9个百分点；氮磷钾农学效率分别提高80.4%、163.2%、60%；不同配组肥料产量贡献率比较，二者均以三元素配方最优，二元素配组以有氮配组显著高于无氮配组，表现为N+K>N+P>P+K；产量用配方施肥处理进行比较，再生稻头季比中稻增719 kg/hm2，产值增1537元/hm2。再生稻栽培施肥效应提高，又增加一季收成，发展前景广阔。

The First Season of Ratooning Rice and Middle-season Rice Utilization Rate of Fertilizer Comparison and Application Study

In order to study the effect of fertilization on the first ratoon of rice and the middle-season rice, the comparison of the similarities and differences between the two, the discussion on technical ways to improve fertilizer use efficiency by rice cultivation measures, for the first ratoon of rice and the middle-season rice use efficiency of comparative test. The results showed that: nitrogen and phosphorus and potassium the first ratoon of rice absorption utilization rate than the middle-season rice increased by 15.1, 6.1, 27.9 percentage points; nitrogen, phosphorus and potassium agronomy efficiency increased by 80.4%, 163.2%, 60%; comparison of yield of different proportion fertilizer contribution rate, all two to 3 elements combination was the best, 2 elements in nitrogen coordination group was significantly higher than no nitrogen distribution group, performance for the N+K > N+P > P+K, the yield compared with formula fertilization, the first ratoon rice to increase the output of 719 kg/hm2 than the middle-season rice, output value increases 1537 yuan/hm2. Ratooning rice cultivation the effect of fertilization to improve, adds a harvest, the broad prospects of development.