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硼是蔬菜作物的主要营养元素之一,其主要功能是参与碳水化合物的运输,调节多糖类的合成和促进细胞分裂。缺硼使叶片中的碳水化合物不能向根部输送,根系变褐,引起生理病害,导致减产,重者死亡。各种蔬菜作物缺硼典型症状差异很大,但共同症状是根系不发达,叶片暗绿,新叶色淡而变形,生长点受损或坏死,花发育不全。芹菜缺硼引起茎部开裂。缺硼初期,叶部沿叶缘出现病斑。随着病斑的发展茎脆度增加,沿茎面表皮中出现褐色带,最终在茎表面出现横裂纹,破裂处组织向外卷曲。受害组织常呈深褐色,缺硼植株的根系变褐色,侧根死亡,最后形成小的块根附属物,植株常常死亡。莴苣缺硼出现分生叶片畸形,上部叶
Boron is one of the main nutrient elements of vegetable crops. Its main function is to participate in the transport of carbohydrates, regulate the synthesis of polysaccharides and promote cell division. Lack of boron in the leaves of carbohydrates can not be transported to the roots, brown roots, causing physiological diseases, leading to reduced production, severe cases of death. The typical symptoms of boron deficiency in various vegetable crops are quite different, but the common symptom is that the root system is underdeveloped, the leaves are dark green, the new leaves are light and distorted, the growth points are damaged or necrotic, and flower hypoplasia. Bare celery causes the stem to crack. Initial lack of boron, leaves along the leaf margin lesions. With the development of lesion stem crispness increased along the surface of the epidermis along the emergence of brown band, the final transverse cracks in the stem surface, rupture at the organization curl outward. The victim tissue is usually dark brown, the roots of the boron-deficient plants turn brown, the lateral roots die, and finally the smaller root appendages form and the plants often die. Biced lettuce boron deficiency appears deformity, the upper leaves