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目的:研究不同种植密度和采收期对栽培唐古特大黄生长发育和产量的影响,为唐古特大黄的规范化栽培技术提供理论依据。方法:设计5种不同种植密度(株距×行距):10 cm×50 cm,20 cm×50 cm,30 cm×50cm,40 cm×50 cm,50 cm×50 cm,采用随机区组设计,每一密度设置3个重复;采收期为5月,7月,10月。对生长发育及产量指标进行测量、数据统计与分析。结果:种植密度及采收期对唐古特大黄的生长发育和产量均有影响。随株距增大,药材个体各指标测量值增加。株距为40 cm或50 cm时,药材个体的根鲜重、根干重达到最大值;唐古特大黄的生长发育指标与产量指标,年际之间、月际之间对比均具有显著性差异(P<0.05)。结论:考虑到经济效益,青海省唐古特大黄种植最宜栽培的行株距为50 cm×30 cm(或40 cm),于10月份进行采收。
Objective: To study the effects of different planting densities and harvesting dates on the growth and yield of rhubarb in cultivation of Tangut, and provide the theoretical basis for the standardization cultivation of rhubarb in Tanggut. Methods: Five different planting densities (plant spacing × row spacing) were designed: 10 cm × 50 cm, 20 cm × 50 cm, 30 cm × 50 cm, 40 cm × 50 cm, 50 cm × 50 cm. A set of three repetitions of density; harvest period of May, July, October. Growth and development and yield indicators were measured, data statistics and analysis. Results: The planting density and harvested period had an impact on the growth and yield of Tanggut rhubarb. As the plant spacing increased, the measured values of individual indicators increased. When the plant spacing was 40 cm or 50 cm, the root fresh weight and the root dry weight of the rhizome of Medicago sativa reached the maximum value. The growth and development indexes of Tanggut rhubarb and the yield indexes, inter-decadal and inter-month comparisons all had significant differences P <0.05). CONCLUSION: Considering the economic benefits, the optimal spacing of rhizome of Tanggut rhubarb in Qinghai Province was 50 cm × 30 cm (or 40 cm) and was harvested in October.