Effects of paclobutrazol on vegetative growth and tuber yield of sweet potato (Ipomoea batatas)
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Abstract
Sweet potato is a tuber crop that accumulates food in the tuber. Excessive vegetative growth negatively affects food partitioning from the shoot to the root resulted in tuber yield reduction. The objectives of this work were to study effects of paclobutrazol on vegetative growth and tuber yield of sweet potato. The experimental design was arranged in randomized complete block design comprised of 4 rates of paclobutrazol; 0, 50, 100 and 200 mg/l and conducted in the field plots of Rajamangala University of Technology Suvarnabhumi during March to June 2017. The results were found that application of all paclobutrazol rates did not significantly affect vine length and leaf area of sweet potato when compared to the control (0 mg/l) but significantly affected tuber yield and some agronomic characters of sweet potato. Application of paclobutrazol at the rate of 200 mg/l showed the best results on leaf greenness, chlorophyll fluorescence, tuber numbers and tuber yield (tuber weight), whereas application at the rate of 50 and 100 mg/l were not significantly different from the control. From this present work, we concluded that application of paclobutrazol at the rate of 200 mg/l did not influence vegetative growth but it contributed to the increase of tuber yield.
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Published manuscript are the rights of their original owners and RMUTSB Academic Journal. The manuscript content belongs to the authors' idea, it is not the opinion of the journal's committee and not the responsibility of Rajamangala University of Technology Suvarnabhumi
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