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Home > News > Cultivation

Improving Medicinal Cannabis Plant Production

Original story from University of Guelph

Published: Oct 18, 2017   

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Improving Medicinal Cannabis Plant Production

Credit: Cannabis Reports on Flickr

University of Guelph researchers have published what is believed to be the first scientific paper in North America on improving medicinal cannabis plant production, helping move the industry into the realm of high-tech laboratories and evidence-based practices.


“Growing marijuana has been illegal for so many years that there has been hardly any scientific research up until this point on how to produce this crop,” said Prof. Youbin Zheng. “There has been no science guiding this industry.”


Zheng, along with Prof. Mike Dixon and PhD student Deron Caplan, investigated optimal fertilizer rates and soilless growing substrates required to grow cannabis plants with higher amounts of medicinal components and greater yield.


The study, which was funded in part by the Natural Sciences and Engineering Research Council of Canada, was published recently in the journal HortScience. It has received international media attention with stories in CBC, Financial Post, Yahoo Finance, CityNews, and CTV


It is the first of a series of U of G studies investigating ideal horticultural practices for indoor cannabis production.


 “The University of Guelph is one of the top universities in the world for horticulture research, particularly for controlled environment plant production,” said Zheng, who holds the environmental horticulture chair in the School of Environmental Sciences.


“We have the cutting-edge technology and the expertise to lead this area of research, and are well-positioned to train horticulturalists for the rapidly growing cannabis industry.”


The University has studied medicinal cannabis production for scientific purposes for several years, Zheng said. Recently proposed legislation means more licensed growers are seeking expertise, he added.


“This has enabled us to have a more intense focus on this type of research.”


The newly published study focuses on plant performance during the vegetative stage. The researchers determined the optimal amount of fertilizer and developed two soilless growing substrate recipes to produce high-yielding plants rich in cannabidiol and THC – the two primary medicinal components.


A second paper, soon to appear in HortScience, examines ideal fertilizer rates and growth substrate conditions for flowering plants.


The team is now studying lighting and irrigation to grow high-yielding, quality cannabis.


“Controlling the light spectrum, for example, provides the opportunity to standardize the concentration of cannabidiol, a chemical component in medical marijuana that appears to cause no intoxicating effects,” said Dixon, director of the Controlled Environment Systems Research Facility.


“We have this unique expertise, and now we can apply it to an area that has yet to be scientifically explored.”


This article has been republished from materials provided by University of Guelph. Note: material may have been edited for length and content. For further information, please contact the cited source.

Reference

Caplan, D., Dixon, M., & Zheng, Y. (2017). Optimal Rate of Organic Fertilizer during the Vegetative-stage for Cannabis Grown in Two Coir-based Substrates. HortScience, 52(9), 1307-1312.

 

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