摘要
为满足长江上游地区对早熟油菜直播高产栽培技术的需要,采用三元二次正交旋转组合设计,研究播期(X1)、种植密度(X2)、氮肥(纯氮,X3)3个栽培因子对甘蓝型早熟双低油菜‘重蓉油1号’直播产量的影响,并寻求最优高产栽培模型。结果表明:3个因子与‘重蓉油1号’产量的线性回归方程为:Y=1878.179+245.269X2+72.438X3+214.370X22+105.000X1X2。各因子对产量影响的效应大小为种植密度>施氮量>播期,其中种植密度、施氮量与产量呈开口向上的抛物线关系,播期与种植密度的互作效应最显著;在试验设定的条件范围内,较早播种及较高的氮肥水平有助增产。产量超过2353.42kg/hm^2的高产栽培措施组合为:10月2—18日播种、种植密度31.95万—36.10万株/hm^2、施氮量105.0—168.9kg/hm^2。
In order to meet the needs of direct seeding and high-yield of early maturing rape in the upper reaches of the Yangtze River,the effects of 3 cultivation factors[sowing date(X1),planting density(X2)and nitrogen fertilizer(pure nitrogen,X3)]on the direct seeding yield of early maturing double low rapeseed 4 Chongrongyou I’were studied by ternary quadratic regression orthogonal rotational combining design,and the optimal high-yield cultivation model was sought.The results showed that the linear regression equation between the 3 factors and the yield(F)of 4 Chongrongyou I’was Y=1878.179+245.269X2+72.438X3+214.370X2^2+105.OOOX1X2.The effect of each factor on yield was planting density>nitrogen application>sowing date,among which the relationship between planting density,nitrogen rate and yield showed upward parabola,and the interaction effect of sowing date and planting density was the most significant.The earlier sowing and higher level of nitrogen fertilizer were helpful to the increase of production in the range of conditions set in the experiment.The combination of high yield cultivation measures with rape yield more than 2353.42 kg/hm^2 was:sowing on October 2—18,planting density 319500—361000 plants/hm^2,nitrogen application 105.0—168.9 kg/hm^2.
作者
李艳花
周燕
石有明
肖长明
黄书琴
刘涛
黄华磊
LI Yanhua;ZHOU Yan;SHI Youming;XIAO Changming;HUANG Shuqin;LIU Tao;HUANG Hualei(Characteristic Crop Research Institute,Chongqing Academy of Agricultural Sciences,Chongqing 402160,China;Science and Technology Department,Chongqing Academy of Agricultural Sciences,Chongqing 401329,China)
出处
《上海农业学报》
2020年第1期25-31,共7页
Acta Agriculturae Shanghai
基金
重庆市农业科学院青年创新团队项目(NKY-2018QC01)
国家油菜产业技术体系三峡综合试验站项目(CARS-13)。
关键词
双低杂交油菜
二次正交旋转组合设计
数学模型
栽培因子
Double-low hybrid rapeseed
Quadratic regression orthogonal rotational combining design
Mathematical model
Cultivation factors
