Response of Common Bean (Phaseolus Vulgaris.L.)to Organic Manures, Phosphorus and Rhizobium InoculationUnder Irrigation

Abstract

A field experiment was conducted for two consecutive seasons (2004/05-2005/06) to study the response of haricot bean (Phaseolus vulgaris.L.) to organic fertilization, phosphorus and rhizobium inoculation under irrigation. The experiment was conducted in the Experimental Farm of the Faculty of the Agriculture at Shambat . The experiment was laid out in a factorial randomized complete block design with four replicates. Improved local white seeded cultivar of common bean (RO/21) was used in the experiment. The treatments consisted of two farmyard manure levels: No farmyard manure (FYM0) and 25 tons/ha (FYM1), and two rates of chicken manure, no chicken manure (CM0) and 10 tons/ha (CM1) and two phosphorus levels: No phosphorus (P0) and 50kg P2O5 (P1). For the inoculation treatments, seeds will either be inoculated (R1) or un inoculated (R0). Triple super phosphate (48%P2O5) was used as source of phosphorus. The inoculant strain USDA/2674 was used in the experiment. The results showed that, percentage of effective nodules, plant height, number of branches per plant, leaf area index, shoot dry, root dry weight, days to 50% flowering, fruit setting percentage, number of seeds per pod, 100-seed weight, leaf protein content, seed phosphorus content and soil phosphorus content were significantly increased by application of farmyard manure. Chicken manure application significantly increased the percentage of effective nodules, nodule dry weight, plant height, number of branches per plant, leaf area index, number of nodes per plant, shoot dry weight, root dry weight, days to 50% flowering, number of flowers per plant, days to maturity, number of pods per plant, fruit setting percentage, 100-seed weight, seed yield, harvest index, seed protein and phosphorus content and soil phosphorus content. Phosphorus application significantly increased number of nodules per plant, percentage of effective nodules, plant height, number of branches per plant, leaf area index, number of nodes per plant, shoot dry weight, root dry weight, days to 50% flowering, number of flowers per plant, number of pods per plant and fruit setting percentage. Rhizobium inoculation, significantly increased number of nodules per plant, plant height, number of branches per plant, leaf area index, number of nodes per plant, number of flowers per plant, number of pods per plant, fruit setting percentage and number of seeds per pod. Other parameters such as plant density at harvest, leaf phosphorus content, soil nitrogen content and soil pH were not significantly affected by application of farmyard manure, chicken manure, phosphorus or rhizobium inoculation. In addition there were significant effects of interactions between farmyard manure, chicken manure, phosphorus and rhizobium inoculation on some growth and yield attributes.