施氮和刈割对纳罗克非洲狗尾草生产特性的影响  

Influence of Nitrogen Application and Cutting on Production Characteristic of Stapf ex Massey cv.Narok

作　　者：张美艳[1] 邓菊芬 尹俊 

机构地区：[1]云南农业大学草业科学系,云南昆明650201 [2]云南省草山饲料工作站,云南昆明650225

出　　处：《草业与畜牧》2008年第5期10-12,16,共4页Pruataculture & Animal Husbandry

基　　金：云南省自然科学基金项目--非洲狗尾草cv.纳罗克原种生产关键技术研究(2006C0069M)

摘　　要：试验采用施氮和刈割二因素析因试验设计,研究了不同的施氮和刈割组合对纳罗克非洲狗尾草(Setariasphacelata(Schum) Stapfex Massey cv.Narok)分蘖数和生育期的影响。结果表明:施氮对分蘖数的影响由大到小为75kg/hm2>50 kg/hm2>25 kg/hm2,25 kg/hm2与其余两水平差异显著(P<0.01)。刈割对分蘖数的影响由大到小为一年刈割3次>一年刈割2次>一年刈割4次。处理N1E2、N1E3、N2E2、N2E3、N3E2、N3E3的生育期都不同程度地被推迟。施氮和刈割改善纳罗克非洲狗尾草生产特性的最佳处理为施氮75kg/hm2和一年刈割3次。Based on factorial design of nitrogen application and cutting, the trial researchea the influence ot me two factors on tillering numbers and growth stage of Stapf ex Massey cv. Narok. The results indicated that the effect of nitrogen application on tillering numbers was in order as following： 75 kilograms per square hectare 〉50 kilograms per square hectare 〉25 kilograms per square hectare, the variance between twenty-five kilograms per square hectare and other two factors was significant （P〈0.01） ; and the effect of cutting frequency on tillefing numbers was in order as following： cutting three times a year〉 cutting twice a year 〉cutting four times a year; the growth stage of N1E2, N1E3, N2E2. N2E3. N3E2, N3E3 was postponed in a certain way. The best treatment that nitrogen application and cutting improved production characteristic of Stapf ex Massey cv. Narok was nitrogen application kilograms per square hectare and cutting three times a year. seventy -five

关 键 词：纳罗克非洲狗尾草 施氮水平 刈割频度 分蘖数 生育期 

分 类 号：S543.022[农业科学—作物学]