论文部分内容阅读
大家知道,决定油菜单位面积产量的因素是株数、有效角果数、每角粒数和粒重。因此,增株、增角、增粒、增重就成为油菜增产的四个重要环节,其中增株是基础。近年来,新州地区随着双季稻发展,稻田油菜由原来习惯的早秋茬(中稻、秧荪)直播,改变为晚秋茬(一季晚粳、二季连作晚稻)直播。由于晚秋作物成熟迟,油菜播种推迟到10月底至11月上旬。当时气温逐渐降低,加之稻田上土壤物理性状较差,严重地影响油菜发芽出苗及植株生长发育,产量降低。针对晚茬油菜生育特点,有经验的农民在生产实践中,已经摸索出适当加大密度及增加有效分枝是提高晚茬油菜单产的重要途径。但是,在晚茬油菜密植增产问题上,依靠主枝
We all know that the factors that determine the yield per unit area of rape are the number of plants, the number of effective pods, the number of grains per square and the weight of grains. Therefore, the increased strain, increase angle, grain, weight gain rapeseed has become an important part of the four, which is the basis of the plant. In recent years, with the development of double cropping rice in Xinzhou area, the rapeseed was changed to late fall (late season japonica rice and late season rice as late rice) by live broadcast of the early autumn stubble (middle rice and yangsun) that was accustomed to. Due to late crop maturity in late autumn, rapeseed sowing was postponed until the end of October to early November. At that time, the temperature gradually decreased and the soil physical properties on paddy fields were poor, which seriously affected rape germination and seedling emergence and plant growth and yield. For the late crop of rape reproduction characteristics, experienced farmers in production practice, have explored the appropriate increase in density and increase effective branches is an important way to improve late crop yields. However, late crop of rapeseed planting close increase production, relying on the main branch