Rapid multiplication of potatoes: influence of environment and management on growth of juvenile apical cuttings
1989
Tran Van, M. | Nguyen, Van Uyen | Vander Zaag, P. (Institute of Experimental Biology, Ho Chi Minch City (Viet Nam))
Seed tubers are costly often unavailable in the warm tropics. Alternative methods of growing potatoes include the use of cuttings. Vigorous mother plants are needed to produce large quantities of cuttings particularly under warmer temperatures. This paper reports the influence of temperature, media fertility and hormones on the growth of apical cuttings and their subsequent productivity as mother plants in Vietnam. Subsoil or sand and dried sieved chicken manure at a ratio of 1:3 was best for rooting and establishing cuttings as mother plants under high temperatures (minimum/maximum of 23.7/31 deg C). Weekly foliar sprays of diluted Knop's media or complete NPK improved growth of rooted cuttings. Mother plant's produced the greatest number of cuttings at the mid and high elevation location's (800 and 1300 m above sea level) where it is possible throughout the year. At the lowland site, temperatures went beyond the critical level from April to October for mother plant survival and apical cutting production. Kinetin or GA3 did not significantly improve cutting production while their combination did improve productivity compared to the control. Mother plants were generally productive for four months after their establishment.
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