不同播期对油菜品种中双9号农艺性状和产量性状的影响

探索油菜品种中双9号在江汉平原的最佳播期,完善高产配套技术。采用随机区组设计研究了不同播期对中双9号农艺性状及产量构成因素的影响。随播种期的推迟,鲜重、株高、茎粗、单株总角果数和每角果粒数都相应减少;单株实际产量和单株总有效角果数存在一定的关系,不同播种期间产量存在差异;单株产量与单株总有效角果数、一次分枝数、一次分枝角果数、株高极显著正相关,与主花序角果数显著正相关。单株总有效角果数与主花序角果数、一次分枝数和一次分枝角果数均呈显著正相关。一次分枝角果数与株高存在显著正相关,与一次分枝数极显著相关。春节前较长的营养生长期是中双9号高产的关键。江汉平原中双9号适宜的播期在9月15日左右。

Influences of the Different Sowing Dates on the Agronomic and Yield Characters of Zhongshuang 9

The optimum sowing date of Zhongshuang 9 in Jianghan plain was experimented so as to perfect the matching high-yielding technique.In the field test with random block design,the influences of different sowing dates on the agronomic characters and yield component factors of Zhongshuang 9 were studied.The fresh weight,plant height,stem thickness,total siliques number per plant and grains per pod correspondingly decreased along with the sowing date delaying.The actual yield per plant had some relationship with total available siliques number per plant.There was difference of yields in different sowing dates.The yield per plant had extremely significantly positive correlation with total available siliques number per plant,first branches number,and siliques number on the first branches and plant height,and significantly positive correlation with siliques number on main inflorescence.Total available siliques per plant had significantly positive correlation with the siliques number on main inflorescence,first branches number and siliques number on the first branches.The siliques number on the first branches had significantly positive correlation with plant height,and extremely significant correlation with first branches number.The long vegetative growth stage before spring festival was the key of Zhongshuang 9 for realizing high-yield.The suitable sowing date of Zhongshuang 9 was on about 15th September.