油菜是需硼较多的作物。油菜缺硼往往是“花而不实”,农民称之为“远看一片黄,近看心发慌”。即从远处看,油菜开花一片黄,但在近处看则发现花蕾脱落,果荚小或有荚无籽(空壳)。一般油菜缺硼,在苗期生长迟缓,叶色暗绿,叶肉变厚,叶缘呈微紫红色,心叶卷曲,主茎萎缩;在苔期苔茎延伸缓慢,植株矮化,中下部叶片的叶缘呈紫红色,花蕾发育不正常,容易脱落;在花期病株主花序萎缩,花器官发育不正常,花色淡黄无光泽,花期延长,果荚不膨胀、结实少甚至不结实、种子大 Rape is a crop that needs more boron. Rape lack of boron is often “flowers and not real,” peasants call it “a far look at a yellow, near the heart panic.” That is, from a distance, the rape blossoms yellow, but when it is near, the flower buds fall off and the pods are small or have pods without seeds (empty shell). General rape lack of boron, growth retardation at seedling stage, dark green leaves, leaf thickening, leaf margin was slightly purple, heart leaves curly, main stem atrophy; moss in the moss period of stem elongation is slow, dwarf plants, the lower leaves Leaf margin was purple, flower buds are not normal, easy to fall off; in inflorescence diseased host atrophy, floral organ development is not normal, yellow color matte, flowering extended pod does not swell, less or less strong fruit, seed large