Agronomic Evaluation of Promising Genotypes of Mung Bean under Hyper Arid Conditions of Indian Thar Desert

摘要

An experiment in factorial RBD was conducted during Kharif 2005 at Gangana village, Jodhpur with 4 improved genotypes (RMG-62, RMG-268, RMG-492 and K-851), 2 fertility levels (10+20 and 20+40 kg N+P2O5 ha-1) and 2 row spacing (30 and 45 cm, respectively). The genotypes showed significant variation in plant height, branches per plant, total biomass per plant; pods/plant, seeds/pod, 100 seed weight straw yield and seed yield . Genotype RMG-492 recorded significantly highest plant height, pods/plant, seeds/pod, total biomass per plant and thus straw and seed yield than other genotypes. It was followed by K-851. Increase in fertility level from 10+20 to 20+40 kg N+P2O5 ha-1 significantly enhanced mean plant height (24.4%), branches/plant (22.7%), pods/plant (25.6%), seeds/pod (21.3%), 100 seed weight (7.3%), biomass per plant (15.5%) and ultimately straw and grain yield (9.8 and 24.4%), respectively. Similarly, increase in row spacing from 30 to 45 cm significantly enhanced all important plant growth and yield attributes viz., plant height (21.6%), branches per plant (28.8%), seeds/pod (11.9%), 100 seed weight (15.7%) and biomass per plant (13.4%). However, the overall seed and straw yield significantly reduced by 10.8 and 20.9%, respectively at wider spacing of 45 cm. It shows that the increased in various plant growth and yield attributes could not make up for reduction in plant population in wider row spacing under hyper arid conditions. The overall interaction studies among genotypes, fertility levels and row spacing revealed significantly higher grain and straw yield of RMG-492 followed by K-851 with higher fertility level of 20+40 kg N+ P2O5 ha -1 at narrower row spacing of 30 cm.