不同化肥施用量对花溪芜菁甘蓝种子产量的影响  

Effect of Different Chemical Application Level on Seed Yield of Brassica hapobrassica in Huaxi

作　　者：王应芬 李娟 雷霞 牟琼 杨义成 

机构地区：[1]贵州省草地技术试验推广站,贵州贵阳550006 [2]贵州省草业研究所,贵州贵阳550006

出　　处：《西南农业学报》2016年第4期842-846,共5页Southwest China Journal of Agricultural Sciences

基　　金：贵州省育种专项"花溪芜菁甘蓝配套栽培技术研究与示范推广"[黔农育专字(2015)005];贵州省农业科学院专项"饲用灰萝卜选育及高效利用研究"[黔农科院院专项(2014)028];贵州省成果转化项目"喀斯特地区草地畜牧业发展配套技术推广"[黔科合成转字(2014)5034];贵州省重大专项"贵州山区牧草产业化生产技术研究集成与应用"[黔科合重大专项字(2014)6017]

摘　　要：为加快国审牧草新品种的应用推广速度,采用二次回归正交旋转组合设计方法,研究N、P、K 3因素5水平对花溪芜菁甘蓝种子产量及经济性状的影响。结果表明:建立了肥料因子与种子产量之间的关系数学模型;经该模型分析,施尿素112.4 kg/hm^2+钙镁磷肥123 kg/hm^2+硫酸钾96.4 kg/hm^2时,种子产量最高,为2918.06 kg/hm^2,产达值291 806元/hm^2。各因素对种子产量的作用以磷肥最大,氮肥其次,影响较小的是钾肥。经济性状对种子产量的贡献大小为主花序长>有效分枝数>株高>单株角果数>单角种子数>千粒重,提高主花序长和有效分枝数可最有效地提高花溪芜菁甘蓝的种子产量,其次是提高株高。The effect of different N,P and K combination levels on seed yield and economic traits of Brassica hapobrassica was studied by the quadratic regression rotation combination design to speed up application and popularization speed of new pasture varieties. Results： The mathematic model between fertilizer factor and seed yield is successfully established. The highest seed yield and output value are 2918.06 kg / hm^2 and 291 806. 00 Yuan / hm^2 under the application condition of 112. 4 kg / hm^2 urea ＋ 123 kg / hm^2 calcium magnesium phosphate＋ 96. 4 kg / hm^2 potassium sulphate respectively. The effect of fertilizer factors on seed yield is P N K. The contribution of different economic traits on seed yield is main inflorescence length effective branches height pods / plant seeds / pod thousand seeds weight.The seed yield of Brassica hapobrassica can be effectively increased by improving main inflorescence length and effective branches,followed by improving height.

关 键 词：花溪芜菁甘蓝 农艺性状 种子产量 数学模型 施肥处理 

分 类 号：S54[农业科学—作物学]