Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610200, China.
North Florida Research and Education Center, University of Florida, Quincy, Florida 32351, United States.
J Agric Food Chem. 2020 Jun 3;68(22):6058-6064. doi: 10.1021/acs.jafc.0c01211. Epub 2020 May 18.
A field study was performed to investigate the development of cannabinoids in flowers of industrial hemp using three day-length-sensitive and two day-length-neutral varieties. Flower samples were analyzed for cannabinoids on a weekly basis from 2 to 4 weeks postanthesis to plant senescence. Results indicate that total THC, CBD, and CBG significantly increased as flowers matured, reaching the greatest concentration during 6 to 7 weeks postanthesis. After a plateau stage of varied length for different varieties, the peak concentrations declined as plants senesced. Total THC was above the 0.3% threshold from 4 weeks postanthesis to the end of the growing season for day-length-sensitive varieties, but this only occurred during 6 to 7 weeks postanthesis for day-length-neutral varieties. The CBD/THC ratio in flowers dynamically changed during the entire reproductive stage for all of the evaluated varieties. The current study provides vital information for successful cultivation of industrial hemp.
进行了一项田间研究，使用三种对日照长度敏感和两种对日照长度不敏感的品种，研究工业大麻花中大麻素的发育情况。从开花后 2 周到 4 周，每周对花样进行大麻素分析，直到植株衰老。结果表明，随着花朵的成熟，总 THC、CBD 和 CBG 显著增加，在开花后 6 至 7 周达到最高浓度。在不同品种的不同长度的稳定阶段之后，随着植物衰老，峰值浓度下降。在对日照长度敏感的品种中，从开花后 4 周开始，总 THC 超过 0.3%的阈值，持续到生长季结束，但在对日照长度不敏感的品种中，仅在开花后 6 至 7 周出现这种情况。在所有评估品种的整个生殖阶段，花中的 CBD/THC 比值都在动态变化。本研究为成功种植工业大麻提供了重要信息。
