反枝苋对烤烟农艺性状及产值的影响  

Effect of Amaranthus retroflexus L. Population Density on Agronomic Traits and Output of Flue-Cured Tobacco

作　　者：张昌容 叶照春 李鸿波 朱峰 何永福 商胜华 

机构地区：[1]贵州省植物保护研究所,贵州贵阳550006 [2]贵州省烟草科学研究院,贵州贵阳550081

出　　处：《杂草学报》2016年第3期28-32,共5页Journal of Weed Science

基　　金：中国烟草总公司贵州省公司科技项目(编号:201022)

摘　　要：为了明确烟田主要杂草反枝苋对贵州烤烟农艺性状、产量、产值的影响,反枝苋按0~25株/m^2的密度栽种,共设置13个处理,在烤烟成熟期记录株高、茎粗、叶片数、叶长、叶宽、叶鲜质量、地上植株鲜质量、茎秆鲜质量、叶干质量、产值等一系列指标参数,通过11种曲线方程进行拟合、回归分析。结果发现三次方程(y=b_0+b_1×x+b_2×x^2+b_3×x^3)具有最高的拟合度和实用性,建议生产上可以用该三次方程预测反枝苋对烟草农艺性状、产量、产值的影响。A study was conducted to determine the effects of Amaranthus retroflexus L. population density on agronomic traits and yield of flue - cured tobacco in Guizhou. Thirteen density levels of A. retroflexus L. ranging from 0 to 25 plants per m2 were estabished and several traits of flue - cured tobacco were recorded, including plant height, stem di-ameter ,leaf number, leaf length, leaf width, leaf fresh weight, the ground plant fresh weight, stem fresh weight, leaf dry weight, and value. To determine the best model to fit the data of A. retroflexus L. density and tobacco agronomic traits, 11 equations were evaluated. The cubic equation （y = b0 ＋ blx ＋ b2x2 ＋ b3x3） exhibited highest and most practical fit-ting for the data. In conclusion, the relationship of flue - cured tobacco agronomic traits and A. retroflexus L. population density can be predicted using cubic equation.

关 键 词：烟草 反枝苋 农艺性状 曲线拟合 回归分析 

分 类 号：S451[农业科学—植物保护] S572.01