The biomass production and nutrient content of roselle leaves grown with poultry litter and Organosuper®

Abstract

ABSTRACT. The objective of this study was to evaluate the effects of poultry litter and Organosuper ® with three modes of application on the biomass production and nutrient content of the leaves of roselle plants. The treatments in each crop cycle were in a factorial arrangement, 2 x 3 + 1, composed of a control and combinations of the two organic fertilizers (poultry litter (10 ton. ha ) and the three application modes (surface, incorporated and surface + incorporated), in a randomized block design with four replicates. In the surface + incorporated mode, the organic fertilizers were applied as 5 ton. ha

Agroeconomic Production and Antioxidant Activity of the Hibiscus Cultivated Under Organic Practices and Plant Arrangements

“…The yields of the calyces obtained in this study resembled those obtained by Castro et al (2004), who evaluated the months of implementation of organic production of the hibiscus (October, November, December and January), having found a mean production of dry calyces of 1.45 t ha -1 . On the other hand, the production was lower than that obtained by Ramos et al (2012), who studied methods of adding poultry manure to the soil and obtained the highest production of fresh mass (10.8 t ha -1 ) and dry mass (1.2 t ha -1 ) and a greater number (3.980.602) of hibiscus calyces with the use of the poultry manure (10 t ha -1 ) covering the crops in the agricultural year 2009/2010. The different yields achieved are likely due to climatic conditions e and cultivation treatment, since variations in production between years are expected in upland conditions due to rainfall variability (Blaise, 2006), soil quality and temperature.…”