Productivity of cassava roots related to use of biofertilizer, organic compost and green manure

Abstract

The objective of the research was to study the effect of green manure, organic compost and
biofertilizer on cassava root productivity. The experiment was performed in the municipality of
Garanhuns, state of Pernambuco - Brazil, by using a randomized block design in a sub-subplot
(4x2x4), with four legumes in the plot (crotalaria, cowpeas, jack bean, and dwarf pigeon peas).
Absence and presence of organic compost represented subplots and four concentrations (0, 5,
10 and 15%) of biofertilizer represented the sub-subplots. The following variables were analyzed:
number of commercial roots (NRC), and productivity of commercial (PRC) and total roots
(PRT). Results were subjected to analysis of variance, and obtained means were compared
by Tukey’s test (p<5%) and graph-plotted through use of regression equation to the different
concentrations of biofertilizer. Jack bean associated with the organic compost increased number
and productivity of cassava commercial roots. However, biofertilizer has showed not being
necessary for cassava production.