油菜是一种较耐盐碱的直根作物,其耐盐碱能力因季节而异,一般秋(幼苗)弱春强;相反,盐碱地盐分的运行规律一般是秋降春返。所以,当秋季地表盐分浓度降低时,正是油菜耐盐碱能力较弱的苗期;待到春天盐分聚积地表面时,油菜的直根已扎入地下深处,其耐盐碱的能力也大为增强,难以造成严重 Rape is a salt-tolerant straight root crops, its salt-tolerance ability varies with the season, the general autumn (seedlings) weak spring; On the contrary, the salinity of the salt is generally the law of autumn fall spring return. Therefore, when the fall of surface salt concentration is reduced, it is the rapeseed with weaker saline-alkali ability. When the surface of spring salinity accumulates, the straight roots of rapeseed have plunged into the underground, Greatly enhanced, it is difficult to cause serious