Spatial dimensions and poultry manure rate effects on sweet corn (Zea mays L. saccharata Sturt.) varieties in Calabar
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Abstract
The study evaluated the effect of variety, planting distance and rates of poultry manure on the performance of sweet corn in the humid rainforest of South Eastern Nigeria. The study was a 2 x 2 x3 factorial experiment laid out in a randomized complete block design (RCBD) and treatments consisted of two sweet corn varieties (TZMS and TZIS), two planting distances (40 cm x 25 cm and 50 cm x 25 cm) and three rates of poultry manure (0, 10 and 20 t ha-1) giving 12 treatment combinations which were replicated three times, giving 36 experimental plots. Data were collected per plant for plant height, number of leaves, leaf area, leaf area index; while yield data were taken for the number of seed rows per cob, green cob yield and cob yield per hectare. The data was subjected to a two–way analysis of variance (ANOVA) and means were compared using the Fisher’s Least Significant Difference at 0.05 probability level. The result showed that the application of 10 and 20 t ha-1 PM significantly (p<0.05) increased the vegetative growth of sweet corn.
The highest (p<0.05) leaf area and leaf area index occurred at PM rates of 20 t ha-1 followed by 10 t ha-1 which were statistically similar. Apart from these however, poultry manure did not have any other salutary effects on the performance of sweet corn during the study.
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