Effects of Harvesting Periods on Dry Matter Yield and Main Cannabinoids Content of Industrial Hemp

doi:10.11924/j.issn.1000-6850.casb2024-0660

Abstract

Abstract:

In order to explore the suitable harvest period of industrial hemp and improve yield and quality, the effects of ‘Hanma 7’ and ‘Saima 1’ were used as experimental materials to analyze the impact of different harvest periods on the yield, yield traits and CBD (cannabidiol), CBG (cannabigerol) and THC (tetrahydrocannabinol) content of industrial hemp. The results showed that 90-111d after transplanting, the flower and leaf yields, plant height, stem diameter, first branch height, number of branches, dry weight of flower and leaf per plant and dry weight of stem per plant showed a significant increase trend with the extension of harvest time, and the yield and related traits of ‘Hanma 7’ performed better than ‘Saima 1’. The total CBD content, THC content and CBG content of the two varieties increased with the harvest time, and the total CBD content, THC content and CBG content of ‘Hanma 7’ were slightly higher than that of ‘Saima 1’. Correlation analysis showed that the flower and leaf yields and yield traits, main cannabinoid content of the two varieties were positively correlated with harvest time. The study has shown that appropriate delayed harvest period can effectively increase the yield and main cannabinoid content of industrial hemp.

Key words: industrial hemp, yield, yield traits, cannabinoid content, harvest period, variety, cannabidiol, tetrahydrocannabinol, cannabigerol, ‘Hanma 7’, ‘Saima 1’

LI Xuehai, BIAN Jing, CAO Kun, ZHANG Xiaoyan. Effects of Harvesting Periods on Dry Matter Yield and Main Cannabinoids Content of Industrial Hemp[J]. Chinese Agricultural Science Bulletin, 2025, 41(16): 9-13.

Figures/Tables 8

References 30

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品种	大麻素	90 d	97 d	104 d	111 d
赛麻一号	CBD	1.291f	1.958e	3.500c	5.566a
	THC	0.081f	0.106e	0.150c	0.242b
	CBG	0.106f	0.417e	0.528d	0.592c
汉麻7号	CBD	1.463f	2.296d	4.903b	5.731a
	THC	0.096ef	0.125d	0.255b	0.290a
	CBG	0.136f	0.541d	0.715b	0.772a

品种	大麻素	90 d	97 d	104 d	111 d
赛麻一号	CBD	1.291f	1.958e	3.500c	5.566a
	THC	0.081f	0.106e	0.150c	0.242b
	CBG	0.106f	0.417e	0.528d	0.592c
汉麻7号	CBD	1.463f	2.296d	4.903b	5.731a
	THC	0.096ef	0.125d	0.255b	0.290a
	CBG	0.136f	0.541d	0.715b	0.772a

品种	CBD含量	THC含量	CBG含量	花叶产量	株高	茎粗	第一分枝高	分枝数	单株叶干重	单株茎干重
汉麻7号	0.974^*	0.965^*	0.936	0.988^*	0.964^*	0.998^**	0.897	0.945	0.988^*	0.981^*
赛麻一号	0.977^*	0.961^*	0.940	0.975^*	0.917	0.955^*	0.923	0.946	0.975^*	0.954^*

品种	CBD含量	THC含量	CBG含量	花叶产量	株高	茎粗	第一分枝高	分枝数	单株叶干重	单株茎干重
汉麻7号	0.974^*	0.965^*	0.936	0.988^*	0.964^*	0.998^**	0.897	0.945	0.988^*	0.981^*
赛麻一号	0.977^*	0.961^*	0.940	0.975^*	0.917	0.955^*	0.923	0.946	0.975^*	0.954^*