Comparative early growth performance of four selected sweet potato (Ipomoea batatas) varieties under different water moisture levels

Shandil, Arshni Sanjita and Singh, Ashneel A. and Sukal, Amit and Tuia, Valerie (2025) Comparative early growth performance of four selected sweet potato (Ipomoea batatas) varieties under different water moisture levels. Comparative early growth performance of four selected sweet potato (Ipomoea batatas) varieties under different water moisture levels, 102 (4). pp. 456-466. ISSN 00413216

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Abstract

The growth performance of four sweet potato varieties (Tainang #64, Beauregard, Okinawa purple and Blanco de Chilca) was evaluated over a 238-day period under three different water stress conditions. Control (T0) was well-watered condition, soil was maintained at 40% moisture throughout the experiment. Treatment 1 (T1) was water stress condition with a stepwise reduction of soil moisture content from 40 - 12%. Treatment 2 (T2) maintained a constant soil moisture of 20% that lasted throughout the experiment. Under water stress (T1), variety Tainang #64 exhibited the longest mean main stem length, secondary stem length, and the highest number of leaves. Blanco de Chilca cultivar demonstrated significantly different performances between the two water stress conditions. Significant differences were observed in main stem length, secondary stem length, and the number of leaves across all varieties. Growth performance was compared at various water stress levels, with significant differences in main stem length between Okinawa purple and Blanco de Chilca, as well as between Beauregard and Blanco de Chilca. For both Tainang #64 and Okinawa purple, a notable difference in secondary stem length growth was observed when comparing T1 and T2. Significant differences in secondary stem length growth were exhibited between Beauregard and Blanco de Chilca, as well as between Beauregard and Okinawa purple. Under water stress, Tainang #64 demonstrated the most promising growth performance. Further research under field conditions is recommended to validate these results.

Item Type:	Journal Article
Uncontrolled Keywords:	Centre for Pacific Crops and Trees; variety; plantlets; treatment; water stress; sweet potato; Ipomoea batatas
Subjects:	S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture
Divisions:	School of Agriculture, Geography, Environment, Ocean and Natural Sciences (SAGEONS)
Depositing User:	Ashneel Singh
Date Deposited:	13 Nov 2025 22:00
Last Modified:	13 Nov 2025 22:00
URI:	https://repository.usp.ac.fj/id/eprint/15171

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