Abstract
Industrial hemp is once again legal in the United States but agronomic practices are not well characterized, especially for organic production systems. Many producers are concerned that while increased fertility may increase biomass yield it will also disproportionally increase that rate of total tetrahydrocannabinol (THC) accumulation, making their crop more likely to be noncompliant at harvest. We measured the effect of four organic fertility treatments: (1) no fertility (NA); (2) manure-based compost (CM); (3) an industry-standard organic fertilizer blend (ST); and (4) an intensive fertility treatment designed for cannabis production (BQ), on biomass yield and cannabinoid accumulation over multiple timepoints and two years. We found that higher fertility (ST and BQ) led to increased biomass but did not influence the ratio of cannabidiol (CBD) to THC over time. We also found the ST treatment yielded the most consistently across years, whereas CM and BQ were less predictable and more costly, respectively. Our results show that fertility recommendations can be made to increase biomass yield without increasing the chance of noncompliance. Additional research addressing specific fertility requirements in organic cropping systems for hemp will be needed to meet consumer demand while remaining profitable and sustainable for growers.
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Claims 4
Claim · model-written summary
Higher fertility (ST and BQ) increased hemp biomass.
- Taxon
- Cannabis sativa
Cannabis sativat0 - Treatment
- higher fertility (ST and BQ)e3
- Outcome
- biomasse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Hemp (Cannabis sativa L.)”
e3“We found that higher fertility (ST and BQ) led to increased biomass but did not influence the ratio of cannabidiol (CBD) to THC over time”
Claim · model-written summary
Higher fertility (ST and BQ) did not influence the ratio of CBD to THC of hemp over time.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- higher fertility (ST and BQ)e3
- Outcome
- ratio of cannabidiol (CBD) to THCe3
- Direction
- did not influencee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Hemp (Cannabis sativa L.)”
e3“We found that higher fertility (ST and BQ) led to increased biomass but did not influence the ratio of cannabidiol (CBD) to THC over time”
Claim · model-written summary
The ST treatment yielded the most consistently across years than CM and BQ, which were less predictable.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- ST treatmente4
- Outcome
- yielded the most consistently across yearse4
- Direction
- the most consistentlye4
- Comparator
- CM and BQe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Hemp (Cannabis sativa L.)”
e4“We also found the ST treatment yielded the most consistently across years, whereas CM and BQ were less predictable and more costly, respectively”
Claim · model-written summary
Fertility recommendations can be made to increase hemp biomass yield without increasing the chance of noncompliance.
- Taxon
- Hemp
Cannabis sativa subsp. sativat0 - Treatment
- fertility recommendationse5
- Outcome
- biomass yield without increasing the chance of noncompliancee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Hemp (Cannabis sativa L.)”
e5“Our results show that fertility recommendations can be made to increase biomass yield without increasing the chance of noncompliance”
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