雪峰蜜桔“2+X”氮肥总量控制试验

Total Amount Control of “2+X” Nitrogen Fertilizer for “Xuefeng” Honey Orange

为了探索雪峰蜜桔科学施肥方法、优化柑橘施肥方案,通过“2+X”氮肥总量控制试验,研究在不同氮量配比的施肥情况下对雪峰蜜桔产量和经济效益的影响。结果表明:与无氮区相比,常规施肥区、优化施肥区、70%优化氮区和130%优化氮区增产显著,分别增产658.0、720.4、595.0和628.0kg/667m^2,增产率分别达47.6%、52.1%、43.0%和45.4%;从肥料的产投比来看,优化施肥区与70%优化氮区效益最好。分析可得氮肥投入以优化氮量较好,过多和过少都会影响雪峰蜜桔的产量和效益。

In order to optimize the fertilization schedule of “Xuefeng” honey orange by the control of total amount of “2+X” nitrogen fertilizer, effects of different nitrogen ratios on yields and economic benefits of “Xuefeng” honey orange were studied. The results were listed below: compared with the non-nitrogen fertilization area, there were significant yield growths in the conventional fertilization area, optimum fertilization area(urea 450 kg/hm^2), 70% optimum nitrogen fertilization area(urea 315 kg/hm^2) and 130% optimum nitrogen fertilization area (urea 585 kg/hm^2), specifically, the yield increased by 9 870 kg/hm^2, 10 806 kg/hm^2, 8 925 kg/hm^2 and 9 420 kg/hm^2, respectively, and growth rate increased by 47.6%, 52.1%, 43.0%, and 45.4%, respectively. According to input-output ratio, optimum fertilization area had the best benefit, which was most favorable, too much or too little would reduce the yield and benefit of “Xuefeng” honey orange.