宁夏南部半干旱区板蓝根适宜种植密度研究

Study on Radix Planting Density in Semi-arid Region in Southern Ningxia

通过田间小区试验研究了板蓝根适宜种植密度,以期为宁夏南部半干旱区板蓝根生产提供科学依据。试验结果表明:板蓝根叶片营养生长和单株根重均随着种植密度增加显著降低,最大种植密度处理(52.0万株/hm^2)与最小密度处理(22.5万株/hm^2)相比,叶片长度和厚度分别降低了32.30%和25.84%;最大种植密度处理单株根重也仅为最小密度处理的32.21%。当种植密度为30.0万株/hm^2时,产量最高,种植密度为47.6万株/hm^2时产量最低,最高产量处理比最低产量处理增产27.84%,综合考虑当地的土壤肥力和管理水平,板蓝根的适宜种植密度为30.0万株/hm^2~34.5万株/hm^2。

To provide a scientific basis for the production Radix in Semi-arid area in southern Ningxia, field plot experiment was conducted to study Radix suitable planting density. Results showed that vegetative growth and root weight per plant decreased significantly with Radix planting density increase, compared to the maximum planting densities 49 500 plant/hm^2 with minimum density 22 500 plant/hm^2 treatment leaf blade length and thickness decreased by 32.30% and 25.84% respectively.Plant root weight only 32.21% of minimum density treatment. The planting density of 300 000 plant/hm^2 have the highest yield, 27.84% higher than that of the lowest yield treatment whose planting density was 476 000 plant/hm^2, considering the local soil fertility and management level, suitable Radix planting density was between 300 000 plant/hm^2 and 345 000plant/hm^2.