Comparison Studies of Cultivation Technology of CBD and Superfood Hemp Varieties
DOI:
https://doi.org/10.14456/jare-mju.2024.41Keywords:
Cannabis sativa L., hemp CBD, hemp superfood, cultivation technologyAbstract
Studying the research and the development of the hemp (Cannabis sativa L.) cultivation technology on the CBD types and superfood type of hemp varieties was divided into two experiments i.e. 1) the cultivation technology and harvesting of CBD type hemp varieties were studied on the characteristics of varieties and the effect of fertilizer formulates on growth and yield of three hemp varieties; CD1, 1:20 and CD2 purple. Three methods of canopy training: no-training (Christmas tree shape), the screen of green (ScrOG), and low-stress training (LST) and three different fertilizer formulates applied on 60-day post-planting: no fertilizer, 15-15-15 fertilizer at the rate of 25 kg/rai, and 4-12-15 at the rate of 25 kg/rai were also examined. The results showed the CD2 purple variety with no training (Christmas tree shape) and applying fertilizer formula 15-15-15 on 60 days after planting had the highest growth and yields. The highest plant height of 382.0 cm, the highest plant weight of 12,500 grams, the highest number of inflorescences of 35.3 inflorescences/plants, the largest inflorescence length of 57.7 cm, and the total inflorescence weight of 8,066.7 grams were exhibited. In addition, the study on the effect of varieties and harvesting stages of the mature inflorescence stage on the main substance contents of three CBD types of hemp varieties found that CD1 cultivars harvested at 50% of the mature inflorescence stage had the highest CBD content (11.46% w/w of dry weight) and 62.00% w/w of crude extract. Then 2) the effect of cultivation technology and harvesting on the growth and yield of eight hemp varieties, namely RPF1, RPF2, RPF3, RPF4, RPF5, RPF6, RPF7, and RPF8, were studied. The results revealed that the RPF6 variety gave the highest seed yields per plant at 107.4 grams and the highest extracted oil percentages at 15.0 %w/w. Besides, the effect of varieties (eight hemp varieties) and harvesting stages on the percentage of seed germination (50, 75, and 100% stages) were studied. It was found that the RPF6 variety harvested at 75% had the highest germination percentage at 94.0%. Therefore, the harvesting stage of hemp seeds at 75% that was suitable for producing seeds for sale and extracting oils, would be advised to the farmers.
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