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油菜在我县种植历史悠入,但是各地油菜栽培的密度却差异很大,少则五,六千,多则一、两万,一些社队常因密度不够合理,而造成严重的减产。因而,研究油菜在不同条件下的合理密度,对指导大田生产,提高油菜产量,有现实意义.密度是一个复杂的问题,密度的不同,涉及到油菜生长过程中肥、水、光、温等生活因素也起变化。所以因地制宜地合理留苗,才能充分利用光能和地力,制造较多的营养物质,
Rape has a long history of planting in our county. However, the density of rapeseed cultivation varies widely from as little as five to six thousand and as many as ten to twenty thousand. Some communes and brigades often cause serious production cuts due to the lack of reasonable density. Therefore, it is of great significance to study the reasonable density of rapeseed under different conditions to guide the field production and increase the yield of rapeseed.Density is a complex problem, the density of different, related to the growth of rapeseed fertilizer, water, light, temperature, etc. The factors of life also change. Therefore, according to local conditions reasonable to stay seedlings, in order to make full use of light and soil to create more nutrients,