Study on Fertilizer Requirement and Harvest Time of Angelica pubescens in Western Hubei Producing Area
[Objective]It provides a theoretical basis for the scientific fertilization and timely harvesting of Angelica pubescens in western Hubeiproducing area. [Method] The accumulation of nitrogen, phosphorus, potassium and 4 coumarins was studied by regular sampling of Angelicapubescens after transplanting. [Result]The accumulation of nitrogen and phosphorus in Angelica pubescens population showed a linear upwardtrend. The potassium accumulation peaked in mid-August. The N, P2O5 and K2O required for 100 kg of Angelica pubescens dry root were1.61,1.25,2.70 kg, respectively. The content of columbianetin reached the highest in mid-June and basically stabilized after mid-September.The content of isoimperatorin peaked in mid-August and continued to decline thereafter. The content of columbianadin fluctuated greatly beforemid-August and increased slowly after mid-September. The content of osthole reached the lowest in July, increased continuously after mid-September,and reached the highest in mid-December. The accumulation of the other three coumarins increased with time and reached the highestin mid-December. [Conclusion] The ratio of N∶P2O5∶K2O supply was 1.29∶1.00∶2.17. June to October was the critical period of nitrogenand phosphorus absorption, and June to August was the critical period of potassium absorption. Harvesting in December is preferable.
Angelica pubescensFertilizer requirement lawCoumarin contentPicking time
万方数据
维普
