Effects of Leaf Positions and Crop Production Standards on Quantity and Quality of Kratom Yields
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Abstract
Kratom is a medicinal plant that has been cultivated in Thailand for a long time. Cultivation under crop production standard can enhance crop quantity and quality. It is essential to pay attention from the land preparation to appropriate post-harvest management process. The purpose of this research was to study the effects of leaf positions on the quantity and quality of kratom leaf yield under organic agricultural standards (OAS) and good agricultural practices (GAP). The 2nd, 3rd, 4th, and 5th leaf positions were collected from both crop standards. The results demonstrated that the leaves from OAS gave average dry weight, leaf area, and leaf green value (a*) higher than those of the GAP. For the leaf positions, the 2nd, 3rd, and 4th positions of leaf had no difference fresh weight, dry weight, and leaf area. The comparison of 8 and 10-month-old kratom yields after transplanting under OAS and GAP standards was done. The results revealed that 8-month-old kratom of OAS gave higher average number of leaves, fresh weight, and dry weight than those of GAP. Regarding mitragynine content, the result showed no statistical difference between the two crop standards.
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