摘要
目的探讨黄芪不同生长期氮、磷、钾的吸收规律及其种植的平衡施肥问题。方法采用定期采样,分析不同生长期黄芪植株氮、磷、钾的吸收量及生长量,推算种植过程的科学施肥量。结果黄芪植株地上部物质积累主要在7月份之前,此时氮磷钾最高含量分别可达2.193%、0.286%、2.206%;其根部物质积累主要在7月份以后,其氮磷钾含量不断增长。结论黄芪植株生长每年的需氮约1.813 g、需磷0.23 g、需钾1.391 g,6、7月份要多施磷肥。
Objection To discuss Astragalusrnernbranaceus absorption rule of nitrogen,phosphorus,potassium at different growth stages and fertilizer application. Methods To analysis Astragalus membranaceus adult plant that its absorbing capacity of nitrogen, phosphorus, potassium and its growth quantity at different growth stages for evaluation of fertilizer need. Results The dry material of above-ground part of Astragalus adult plant is increasing mainly before July, this time the highest content of nitrogen, phosphorus, potassium separately reaches to 2. 193%, 0. 286%, 2. 206%; the underground part grows mainly after July, and its content of nitrogen, phosphorus, potassium is increasing. Conclusion Each year Astragalus adult plant growth approximately needs 1. 813 g of nitrogen, 0.23 g of phosphorus, and 1. 391 g of potassium, and much more of the phosphate fertilizer in June and July.
出处
《现代中药研究与实践》
CAS
2005年第6期23-25,共3页
Research and Practice on Chinese Medicines
基金
国家科技部"九五""中药现代化研究与产业化开发"项目(2001BA701A59)
关键词
黄芪
氮
磷
钾
物质积累
吸收动态
Astragalus membranaceus
nitrogen
phosphorus
potassium
