The Response of Hemp to Fertilizers in Iowa

Black, C. A.; Vessel, A. J.

doi:10.2136/sssaj1945.036159950009000c0029x

Cited by 4 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Production of ample stem biomass and high quality of hemp fibers (i.e., bast and hurd) is the goal of hemp fiber production systems and these characteristics may be impacted by N fertilization. Stem biomass tended to increase with increased N fertilization in the literature reviewed (Black & Vessel, 1945;Campiglia et al, 2017;Ivanyi & Izsaki, 2009;Papastylianou et al, 2018;Struik et al, 2000;Van der Werf, Van Geel, et al, 1995). However, increased N fertilization has produced stems with weak, coarse fiber or lower fiber content (Black & Vessel, 1945;Hessler, 1947) and stems with above optimum diameter (Jordan et al, 1946), indicating reduced breaking strength of these fibers.…”

Section: Fiber Productionmentioning

confidence: 99%

“…Stem biomass tended to increase with increased N fertilization in the literature reviewed (Black & Vessel, 1945;Campiglia et al, 2017;Ivanyi & Izsaki, 2009;Papastylianou et al, 2018;Struik et al, 2000;Van der Werf, Van Geel, et al, 1995). However, increased N fertilization has produced stems with weak, coarse fiber or lower fiber content (Black & Vessel, 1945;Hessler, 1947) and stems with above optimum diameter (Jordan et al, 1946), indicating reduced breaking strength of these fibers. Additionally, high N fertilization rates have also been found to increase protein content of fiber, which correlates negatively with fiber strength (Black & Vessel, 1945;Hessler, 1947).…”

Section: Fiber Productionmentioning

confidence: 99%

“…Throughout the vegetative and flowering stage, P is absorbed slowly and is located primarily in the leaves, while by the end of the flowering stage, more than 70% of P in the plant is found in the seed (Legros et al, 2013). Similar to other crops, when soil P concentrations are adequate, no response with additional P fertilizer has been observed in hemp (Aubin et al, 2016;Vera et al, 2010), however studies demonstrated a yield response to additional P when initial soil fertility levels are low (Black & Vessel, 1945). Phosphorus fertilizer additions improved early season appearance of hemp plants (Black & Vessel, 1945) but in at least 1 year of their research, this improved appearance did not translate to increased yield.…”

Section: Phosphorus Fertilizationmentioning

confidence: 99%

“…The limited research on industrial hemp presents mixed results: some studies have suggested that hemp displays luxury consumption of K (Finnan & Burke, 2013a;Ivanyi & Izsaki, 2009), while others have not demonstrated luxury consumption (Legros et al, 2013). Black and Vessel (1945) found that hemp crops had a varied response to K fertilizer, but assumed excess K to be beneficial when levels of N and P in the soil were adequate. Ivanyi and Izsaki (2009) reported a slight increase in stem yield with K fertilization and Legros et al (2013) found hurd yield increased with K fertilization only in years with poor weather conditions.…”

Section: Potassium Fertilizationmentioning

confidence: 99%

“…However, increased N fertilization has produced stems with weak, coarse fiber or lower fiber content (Black & Vessel, 1945; Hessler, 1947) and stems with above optimum diameter (Jordan et al, 1946), indicating reduced breaking strength of these fibers. Additionally, high N fertilization rates have also been found to increase protein content of fiber, which correlates negatively with fiber strength (Black & Vessel, 1945; Hessler, 1947). In contrast, Legros et al (2013) stated that excess N fertilization has not been demonstrated to negatively impact fiber production, beyond increasing leaf production, which can impede drying and preparation of the crop for processing.…”

Section: Nitrogen Fertilizationmentioning

confidence: 99%

See 4 more Smart Citations

Fertility management for industrial hemp production: Current knowledge and future research needs

2020

View full text Add to dashboard Cite

show abstract

Section: Fiber Productionmentioning

confidence: 99%

Section: Fiber Productionmentioning

confidence: 99%

Section: Phosphorus Fertilizationmentioning

confidence: 99%

Section: Potassium Fertilizationmentioning

confidence: 99%

Section: Nitrogen Fertilizationmentioning

confidence: 99%

See 3 more Smart Citations

Fertility management for industrial hemp production: Current knowledge and future research needs

2020

View full text Add to dashboard Cite

show abstract

Nitrogen fertilization impact on hemp (Cannabis sativa L.) crop production: A review

et al. 2023

View full text Add to dashboard Cite

Regained interest in hemp cultivation has created opportunities and challenges, especially regarding crop management, for example, fertilizer application rate. Most of the literature on nitrogen (N) management in hemp production is from Asia and Europe, with more established cropping systems than in North America. Through our review, we found evidence that N fertilizer has a noticeable positive impact on basic crop morphology and physiology parameters, or at least the crop responds to such infield fertilizer applications. Some physiological parameters that show positive response include photosynthetic pigments, N and nitrate concentration, and water use efficiency. N fertilizer has been demonstrated to increase stem and fiber yield but reduce fiber quality. Increasing N also appears to increase seed yield and protein content. Both excess and low rates of N fertilizer are detrimental to floral hemp. There is little evidence that Δ9‐tetrahydrocannabinol concentration is more affected by N fertilization than genetics. The impact of fertilizer source and timing remains a critical area for research. There is still a need for research on developing a sustainable nutrient management program for hemp.

show abstract

Phosphorus fertilisation differentially influences growth, morpho-physiological adaptations and nutrient uptake of industrial hemp (Cannabis sativa L.)

Islam

Rengel

Storer³

et al. 2023

Plant Soil

View full text Add to dashboard Cite

Background and Aims Phosphorus (P) is a restricting nutrient for crop productivity worldwide. P deficiency can lead to stunted growth and development, eventually affecting crop yield. But less is documented about the impact of P fertility on industrial hemp (Cannabis sativa L.) production in the low-P soils of south-western Australia. We aimed to investigate the effect of P rates on growth, physiology, rhizosphere carboxylate exudation, nutrient uptake and P-use efficiency in hemp. Methods The study was conducted in a randomised complete block design with four P rates (0, 40, 80 and 120 mg P kg–1 dry soil) and three hemp varieties (Morpeth, Han FNQ and Fedora 17). Plants were grown and raised in a controlled-environment phytotron until harvested 35 days after sowing at vegetative growth stage (3rd to nth leaf pair). Results Our results revealed a strong influence of treatment (P rate) on hemp growth, physiology, biomass, nutrient uptake and P-use efficiency compared to variety and the variety × treatment interaction. Hemp roots predominantly released citrate in P-deficient conditions and gradually shifted to malate exudation with increasing P supply. The N:P ratio, leaf chlorophyll, and gas exchange data coupled with shoot and root length data suggest that Morpeth and Fedora 17 differ in morpho-physiological adaptations for optimum photosynthesis and growth, with high leaf chlorophyll and coarse root length achieved by Morpeth and high intercellular CO2 concentration and shoot length by Fedora 17. Conclusions Morpeth and Fedora 17 had high shoot biomass, root length, root surface area and agronomic P-use and P-utilisation efficiencies in response to increasing soil P, while Han FNQ had moderate shoot yield, root growth, high citrate exudation, tissue P concentration and P-uptake efficiency.

show abstract

The Response of Hemp to Fertilizers in Iowa

Cited by 4 publications

References 0 publications

Fertility management for industrial hemp production: Current knowledge and future research needs

Fertility management for industrial hemp production: Current knowledge and future research needs

Nitrogen fertilization impact on hemp (Cannabis sativa L.) crop production: A review

Phosphorus fertilisation differentially influences growth, morpho-physiological adaptations and nutrient uptake of industrial hemp (Cannabis sativa L.)

Contact Info

Product

Resources

About