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目前广为栽培的“青皮红麻”,是掌状裂叶型的晚熟品种。其小叶数目随不同生长阶段而变化:苗期为心脏形(图1),中期由三裂(图2)发展为五裂(图3)、七裂(图4),后期又由七裂逆转为五裂(图5)、三裂(图6),末期呈现披针型(图7、8)。麻高50厘米左右时,叶片成五裂叶型,表示红麻进入营养生长盛期,七裂叶期生长达到高峰,日生长速为5—7厘米,故七裂叶期为时长短与产量成正相关.若肥水管理跟不上,叶型过早出现反常逆转,产量就会降低。
At present, widely cultivated “green kenaf”, is a palmate leaf-type late-maturing varieties. The number of leaflets varied with different stages of growth: heart-shaped seedling (Figure 1), metaphase from three-tibia (Figure 2) to five-tibia (Figure 3) and seven-tibia (Figure 4) (Figure 5), trisomy (Figure 6), the last stage showed lanceolate (Figure 7,8). Hemp height of about 50 cm, the leaves into a five-leaf-type, that kenaf into the vegetative growth period, seven-leaf stage of growth to reach the peak, the daily growth rate of 5-7 cm, so the split-leaf period is shorter and the yield A positive correlation.If fertilizer and water management can not keep up, leaf abnormal premature reversal, yield will be reduced.