Successive crops of broccoli, green corn and pea after taro (Colocasia esculenta) - sunn hemp (Crotalaria juncea) consortium

Abstract

Aiming to assess the residual effect of the biomass of the taro-sunn hemp consortium on the performance of the successive crops of broccoli, green corn and peas, an experiment, with 11 treatments, corresponding to the cutting of Crotalaria juncea in the taro-sunn hemp consortium (55, 70, 85, 100, 115, 130, 145, 160, 190 and 220 days after sowing - DAS) plus a control treatment (Colocasia esculenta), was performed. Soil samples were collected and chemical analysis was performed before crop establishment. Plant characteristics and productivity of broccoli, green corn and pea pods were assessed. There were no major changes in soil chemical composition. Higher values of inflorescence fresh matter and broccoli yield were observed in the treatments in which cuts of Crotalaria juncea occurred 145 DAS. The residual effect of Crotalaria juncea cuttings provided higher corn plants and a greater fresh matter of spikes with straw and productivity of commercial ears, compared to the control. There was no residual effect on the characteristics evaluated for pea. The residual effect of Crotalaria juncea cropped in a consortium with Colocasia esculenta increases broccoli yield when cut from 145 DAS and corn cropped in succession.