Industrial hemp has been recognized as a plant primarily used for the production of cloth, paper, and CBD oil. In most scenarios, the industrial hemp is planted as a monoculture system. However, very few have investigated intercropping industrial hemp in loblolly pine plantations. This study allows us to understand the dynamics of hemp plants, identify possible gender roles, and improve the utilization of land for both economic gain and sustainable practices.
We obtained soil from two loblolly pine plantations (Cecil sandy loam from Schenck Forest in -Raleigh, NC and Norfolk loamy fine sand in a plantation in Jacksonville, NC), which were compared to our control (potting soil). Clones were planted with each soil type and evaluated for biomass, fiber length, and CBD oil production.
Results/Conclusions
Our previous preliminary studies evaluated the feasibility of intercropping hemp. This 90 day research trial revealed that the plants will grow in these acidic soils. Soil types in the preliminary study (along with their corresponding pH) were: potting soil 5.85, Cecil sandy loam 6.01, and Norfolk loamy fine sand 5.89. According to our data, the Spectrum variety excelled in all soil types as compared to the other varieties. The tallest plant from each soil type after 90 days were of the Spectrum variety and measured as follows: Potting soil- 69in, Norfolk loamy fine sand- 70in, and Cecil sandy loam- 63in. Our next phase is to look into the physical properties of these plants to observe any structural differences occurring due to the different soil compositions and pH. In addition, we are also looking to identify if sex plays a role in fiber length, particularly in males. The females are used for the production of CBD oil, while the males are isolated and primarily used to pollinate females, before being discarded. We hope this research project will promote sustainability by influencing landowners to effectively utilize their land. Hopefully intercropping with hemp in loblolly pine plantations will provide as an incentive for interested private landowners.