氮肥施用量对不同苜蓿品种的产量性状的影响

目的]为苜蓿新品种的推广和氮肥的合理施用提供理论依据。方法]以氮肥施用量(4水平)为主处理,品种(8个)为副处理,采用3次重复的裂区设计进行田间试验。结果]苜蓿鲜草产量在不同施肥量间差异显著,在不同品种间差异极显著。小区平均产量在阿尔岗金与王冠苜蓿、金皇后、FD2、顶点、苜蓿王L、北极星之间,劳博苜蓿、王冠苜蓿与金皇后、FD2、顶点、苜蓿王L、北极星之间,FD2、顶点与苜蓿王L、北极星之间均存在极显著差异,劳博苜蓿与王冠苜蓿间存在显著差异,阿尔岗金与劳博苜蓿、FD2与顶点、苜蓿王L与北极星之间不存在显著差异。氮肥施用量以100 g/4m2为最好。在该试验条件下,与无N区相比,每千克N素增产苜蓿2.67~22.67 kg。结论]氮肥施用量100 g/4m2与劳博苜蓿的组合为最优组合。

Effects of N Application Amount on the Yield Characters of Different Alfalfa Varieties

Objective] The study aimed to supply theoretical foundation for the popularization of new alfalfa variety and reasonable application of N fertilizer.Method] With N application amount(4 levels) as main treatment,variety(8 varieties) as side treatment,the split-spot design with 3 repeats was used to conduct field experiment.Result] The fresh grass yield of alfalfa had significant difference among different fertilization amounts and extremely significant difference among different varieties.The average plot yield had extremely significant difference between Algonguin and Crown alfalfa,Golden empress,FD2,Dingdian,Alfalking L,Polaris,between Laobo alfalfa,Crown alfalfa and Golden empress,FD2,Dingdian,Alfalking L,Polaris,between FD2,Dingdian and Alfalking L,Polaris,had significant difference between Laobo alfalfa and Crown alfalfa and had no significant difference between Algonguin and Laobo alfalfa,between FD2 and Dingdian,between Alfalking L and Polaris.The N application at 100 g/4m2 was best.Under this experimental condition,compared with the plot without N,1 kilogram N increased the yield of alfalfa by 2.67～22.67 kg.Conclusion] The combination of N application at 100 g/4m2 with Laobo alfalfa was the best one.