Influence of chicken manure on growth and root yield of different sweet potato varieties

Abstract

The objective of this study was to investigate the influence of chicken manure and varieties on growth and root yield of sweet potato. The study was carried out at Rajamangala University of Technology Isan, Surin Campus and arranged in split plot in randomized complete block design (RCBD) with three replications during September 2016 to February 2017. The main plot was three rates of chicken manure (0, 2 and 3 ton/rai) and the sub-plot was three sweet potato varieties (T101, PJ 65-16 and SR1601).        The chicken manure increased the length of stem (30 and 90 days after planting), number of storage root per plant and fresh storage root weight of three sweet potato varieties. The application of 2 ton/rai of chicken manure, the T101 variety produced the highest tuber fresh weight (2,346.7 kg/rai). The application of 1 ton/rai of chicken manure, SR1601, PJ 65-16 and T101 produced the storage root fresh weight as 1,502.0, 2,195.3 and 2,302.0 kg/rai, respectively. The interaction between chicken manure and sweet potato variety was found only in number of storage root per plant. Based on the results of this study, the use of T101 variety with a ton chicken manure is therefore recommended for efficient performance of sweet potato in this location.