稳定氮肥用量对黄山贡菊产量和氮肥利用率的影响

目的]比较稳定氮肥和普通氮肥在黄山贡菊上施用效果的差异。方法]2016年通过在安徽歙县布置黄山贡菊不施氮(CK)、100%N量普通氮肥(CN)、100%N量稳定氮肥(SN1)和80%N量稳定氮肥(SN2)田间试验,研究稳定氮肥用量对黄山贡菊产量、氮肥利用率及经济效益的影响。结果]80%N量稳定氮肥与100%N量普通氮肥施用效果相当,能够达到节本增效目标。100%N量稳定氮肥能提高贡菊产量,显著提高贡菊吸氮量、氮肥表观利用率、农学效率和经济效益,较普通氮肥增产6.9%,氮肥表观利用率显著提高6.08百分点,农学效率显著提高0.35 kg/kg,收益增加6.5%。结论]综合产量、氮肥利用率和经济效益来看,100%N量稳定氮肥在黄山贡菊上施用效果最佳。

Effects of Stabilized Nitrogen Fertilizer Rates on Yields and Nitrogen Fertilizer Use Efficiency of Dendranthema morifolium

Objective] To explicit the effect difference of conventional nitrogen fertilizer and stabilized nitrogen fertilizer on Dendranthema morifolium.Method] Field experiments were conducted in Shexian of Anhui Province in the period of 2016.Four treatments were followed as: no nitrogen(CK),100% N conventional nitrogen fertilizer(CN),100% N stabilized nitrogen fertilizer(SN1) and 80% N stabilized nitrogen fertilizer(SN2),the effects of application of stabilized nitrogen fertilizer on yield,nitrogen use efficiency and economic benefit of Dendranthema morifolium were studied.Result]Application of SN2 was equivalent to CN,it had notable effect on decreasing cost and increasing benefit.SN1 increased yield,and significantly improved nitrogen use efficiency and economic benefit of Dendranthema morifolium.Compared with conventional nitrogen fertilizer,the yield of Dendranthema morifolium would increase by 6.9%,the apparent nitrogen fertilizer recovery efficiency and agronomic efficiency significantly increased by 6.08 percent point and 0.35 kg/kg,respectively,and income increased by 6.5%.Conclusion]According to the results above,SN1 was the best treatment in the Dendranthema morifolium under the test.