油葵是向日葵的油用种,属于菊科向日葵属一年生植物。油葵具有适应性广、抗逆性强、耐盐碱、耐痔薄特点;在盐碱地、下潮地、灰包地、砂石地种植都能生长。油葵根系发达,苗期发根很快,茎高5厘米时,根入土为14厘米;长到8—10片真叶时,主根入土已达50—70厘米,根系分布直径达50—60厘米;继续生长其主根深达1—2米,侧根宽达0.8—1米,须根众多,根毛密生,大部分根系集中在表层,可从浅层土壤中吸取较多的水分,又能从深层土壤中吸取较多的水分。茎的生长高度与品种和环境条件有关,本区平均株高2.12米。茎表面布满了刚毛,表皮细胞和机械组织的木质化、硅质化程度高,可 Sunflower oil is a sunflower oil, belongs to the Compositae sunflower is an annual plant. Sunflower has wide adaptability, strong resistance, resistance to salt and hemorrhoids thin features; in saline-alkali land, under the tide, gray ground, gravel can grow. Roots of oil sunflower developed seedling hair root quickly, stem height 5 cm, the root soil into 14 cm; grow to 8-10 true leaves, the main root has reached 50-70 cm soil, root distribution diameter of 50-60 Cm; continue to grow its main root deep 1-2 meters, lateral root width of 0.8-1 meters, many fibrous roots, root hairs, most of the roots concentrated in the surface, from the shallow soil to draw more water, but also from the deep Draw more moisture in the soil. Stem growth height and variety and environmental conditions, the average height of 2.12 meters in this area. Stem surface covered with bristles, epidermal cells and mechanical lignification, high degree of siliconization, may be