two field experiments were carried out during two fall seasons of 2004/2005
and 2005/2006 on potato (variety Spunta) at Kafr Meet Faris village, Mansoura,
Dakahlia Governorate to study application effect of some organic manure sources
and foliar spraying with mixture of micro-nutrients (Fe, Zn and Mn) in addition to their
interaction on vegetative growth characters, yield and its components, as well as
tubers quality and some chemical concentrations in tubers.
Results indicated that plant length (cm), number of main stems/plant,
number of leaves/plant, foliage fresh weight/plant (gm), number of tubers /plant, tuber
weiqht average (gm) and total tubers yield (tons/fed), as well as con.ents of N, P and
K (%) in tuber were si~nif.cantIY increased in both seasons by using the chicken
manure at rate of (10m Ifed). On the other hand dry weight of tuber (%) was affected
significantly in the two study seasons by using (50% of cattle manure + 50% of
chicken manure). Micro-nutrients concentration of Fe ,Zn and Mn (ppm) in tuber
increased significantly by using cattle manure at rate of (20 m3/fed) , while, foliage dry
weight/plant (gm) and T.S.S. of tuber were not affected by the different organic
manures.
Application of foliar spraying three times by mixture of chelated micro-
nutrients Fe, Zn and Mn (1:1:1) at concentration of (150 ppm) led to significant
increases of the plant length, number of main stems/plant, number of leaves/plant,
foliage fresh weight/plant, foliage dry weight/plant, total tubers yield, number of
tubers/plant, tuber weight average, percentage dry weight of tuber, T.S.S. and the
tuber concentration of N, P, K (%), Fe, Zn and Mn (ppm) in both seasons.
The interaction between organic manures and foliar spraying by mixture of
micro-nutrients indicated that the vegetative growth characters, total tubers yield ,
number of tubers/plant, tuber weight average, percentage dry weight of tuber and
T.S.S. of tuber were significantly affected by using the chicken manure at rate of (10
m3/fed) together with foliar spraying three times by mixture of chelated micro-nutrients
Fe, Zn and Mn (1: 1:1) at concentration of (150 ppm) during the two fall seasons.