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大麻栽培密度较大,植株生长旺盛,需肥水较多,同时吸收肥水集中。据试验,苗高40厘米左右便进入快速生长期,3个月内吸收的营养占全生育期所需营养的3/4左右。这一时期茎秆每日增长达5～6厘米,是纤维形成的重要阶段。为了夺得高产,除了施足底肥(亩施8,000斤左右)、种肥(亩施复合肥10～15斤)外,还要及时灌水追肥。出苗后,一个月内不要灌水,因为幼苗生长缓慢,需水不多,灌水早了易使土壤板结,不利于麻苗生长和根系下扎。
Larger planting density, vigorous plant growth, need more fertilizer, while absorbing fertilizer and water concentration. According to the test, about 40 cm high seedling will enter the rapid growth period, 3 months to absorb nutrients accounted for the whole growth period of nutrition required for about 3/4. During this period the daily increase of stems up to 5 to 6 cm, is an important stage of fiber formation. In order to win the high yield, in addition to applying enough sole fertilizer (Mushi about 8,000 pounds), kind of fertilizer (Mushi compound fertilizer 10 to 15 pounds), but also timely top dressing. After emergence, do not irrigate within one month, because the seedling grows slowly and needs less water. So it is easy to make the soil compaction when irrigation is early, which is unfavorable to the growth and the root system.