Seed Nutrient and Leaf Mineral Content of Jack Bean (Canavalia ensiformis L) Cultivated with Organic and Bio-fertilizers in Grumusol Soil

Abstract

The aim of this study was to determine the seed nutrient content and leaf mineral status of jack bean cultivated in grumusol soil treated with bio-fertilizers and soil ameliorants. The research was conducted on marginal land in Playen Village, Yogyakarta, Indonesia which is at an altitude of 250 m above sea level. The experimental research was conducted with a 2 x 2 x 2 factorial design. The first factor was the type of bio-fertilizers consisting of mycorrhiza and Rhizobium. The second factor was the kind of ameliorants consisting of chicken manure and green manure. The third factor was the dose of bio-fertilizers consisting of 10 g kg-1 seeds, and 20 g kg-1 seeds. Two treatments which were chicken manure and green manure both without bio-fertilizer were used as controls. The results indicated that a combination of green manure and Rhizobium 20 g kg-1 seeds produced the highest protein seed content (28.68 %). The green manure and Rhizobium 10 g kg-1 seeds resulted in the highest carbohydrate seed content (59.98%), while the combination of chicken manure and Rhizobium 10 g kg-1 seeds produced the highest lipid seed content (2.62 %). Moreover, the results indicated that application of chicken manure and mycorrhiza with a dosage of 20 g kg-1 seeds resulted in the highest leaf N content (4.04%), application of green manure and mycorrhiza 20 g kg-1 seeds resulted in the highest leaf P content (0.79%), whereas application of chicken manure and Rhizobium 10 g kg-1 seeds produced the highest leaf K content (1.41%). The application of chicken manure resulted in fewer nodules than green manure application.