Natural plant growth regulator effect on the vegetative growth of Long Pepper (Piper retrofractum Vahl.)
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Abstract
Long pepper (Piper retrofractum Vahl.) is an important medicinal plant for industry. Long pepper is grown by cuttings, but the obstacles encountered in planting through cuttings are easy to wilt and slow growth. The use of natural growth regulators (PGR) is one method to accelerate the growth of plant cuttings. The study showed an interaction between PGR of banana weevil extract and cow urine on the time of shoot emergence, percentage of shoot emergence, shoot length, shoot number, leaves number, and fresh root weight. The fastest shoot emergence resulted from a combination treatment of 0% banana weevil extract and 50% cow urine, namely at two weeks after treatment (WAT), and the longest shoot emergence was in the treatment of 75% banana weevil extract and 50% cow urine, namely at 6WAT. The combination of 0% banana weevil extract and 50% cow urine resulted in the highest shoot length, shoots number, leaves number, root length, roots number, root fresh weight, and root dry weight of 18.98 cm; 2.47; 13.00; 12.61 cm; 3.93; 0.56 g; and 0.11 respectively. The highest shoot diameter resulted from the treatment of 75% banana weevil extract and 25% cow urine of 1.31 cm.
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