西藏春青稞农艺性状在不同施氮量和播期水平下对产量贡献的分析  

Analysis of the Contribution of the Agronomic Characters of Tibet Spring Naked Barley under Different N Fertilizers and Seeding Dates to Yield

作　　者：冯西博[1] 王金菊[1] 多杰次仁[1] 赵慧芬[1] 栾运芳[1] 

机构地区：[1]西藏大学农牧学院植科系,西藏林芝860000

出　　处：《大麦与谷类科学》2009年第2期1-5,共5页Barley and Cereal Sciences

基　　金：国家自然科学基金项目(30660080);教育部科学技术研究重点项目(207113)

摘　　要：氮肥施用量与播期运筹不合理是目前西藏青稞种植所面临的重要问题。在西藏林芝采用不同氮素与播期的裂区试验设计进行青稞种植试验。结果表明:播期对喜马拉雅19产量影响不显著,而施氮量对产量有显著影响;播期、施氮量及播期与施氮量互作对各农艺性状有显著影响,尤以施氮量影响最大;进而对不同施氮量下的青稞产量与影响产量的各农艺因子进行回归、通径和相关分析表明:在三个施氮区,影响产量较显著的农艺因子略有不同,但每穗结实小穗数和千粒重均为影响青稞产量形成的最重要的两个因子。在适氮区影响产量的农艺因子相关系数较高,不合理施氮区相关度偏低,甚至出现负相关。因此,西藏春青稞产量提高调控的重点应在每穗结实小穗数和千粒重,合理施肥可以促进各农艺因子相互协调,进一步促进产量的提高。Irrational seeding stages and using nitrogen are the confronting problems of naked barley planting in Tibet. Experiments on N and seeding stages are done in Linzhi by split -plot design. The results showed that there are remarkable effect on yield of ximalaya 19 with different N fertilizer, but seeding stages are on the contrary. Seeding stages, N fertilizer and mutual effect of both other have remarkable effect on agronomic characters, and effect of N are most influential. By regression, path analysis and the correlation analysis to different N fertilizers, agronomic factors to affect the output remarkably were a bit difference at three nitrogen area, each ear of solid spike number and the weight of a thousand seeds are the most important factors which affect the output. At the suitable nitrogen area, correlation degree of influencing agronomy factors of output is high, on the contrary, unreasonable nitrogen area is low, even minus correlation. So, output of Tibet spring naked barley are increased which should regulated each ear of solid spike number and the weight of a thousand seeds mainly. Rational fertilizer applies may promote the harmonizing of various agronomic factors, further increase the output .

关 键 词：西藏青稞 裂区设计 通径分析 相关分析 农艺性状 

分 类 号：S512.3[农业科学—作物学]