EFFECT OF PLANT DENSITY ON AGRONOMIC TRAITS AND YIELD OF SOYBEAN CULTIVARS IN MASHHAD REGION
Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Mohammad Reza TOOKALLOO, Mehdi AZIZI
To study the effect of plant density on three soybean cultivars on 2008 at Mashhad region an experiment wasconducted as factorial based on Randomized Complete Blocks Design with 4 replications. The experimental factors wasincluded of three cultivars i.e. Hobit, Williams and LWK with three plant density that was 30, 45 and 60 plant/m2. Ineach of three cultivars with increasing plant density, yield components decreased such as fertile node number, podnumber on main stem, branch number, node number on branch and total pod in each plant. But plant height, lowestheight of pod from the earth, node number on main stem, pod number on main stem node, seed number in each mainstem pod, 100 seeds weight of main stem were not affected by plant density. Based on received results from theexperiment, by increasing plant density, leaf area index, crop growth rate, biological and economical yield increased.Yield of cultivar Hobit with least plant height, the most short growth period duration, least biological yield and highestharvest index, was more than other cultivars and cultivar LWK showed minimum yield among three cultivars. Hobitand LWK at density 60 and 30 plant/m2 with yield 5024 and 3378 kg/ha respectively, showed the most and leasteconomical yield among the all of treatments.