PERFORMANCE OF GREENGRAM GENOTYPES DURING KHARIF AND SUMMER SEASONS IN RELATION TO ROOT PARAMETERS AND YIELD UNDER ACIDIC SOIL CONDITION OF ASSAM WITH SPECIAL REFERENCE TO PHOSPHORUS USE EFFICIENCY
Journal Title: International Journal of Agriculture Sciences - Year 2016, Vol 8, Issue 55
Abstract
A study was conducted during kharif and summer seasons of 2013-14 and 2014-15 in the Instructional-cum-Research Farm and Department of Crop Physiology of Assam Agricultural University, Jorhat (Assam) with twenty greengram genotypes to study their performance during kharif and summer seasons in relation to root parameters and yield under acidic soil condition of Assam with special reference to phosphorus use efficiency. Factorial completely randomised design was adopted with three replications. The mean monthly rainfall during crop growing season was 208.3 mm for kharif season and 82.35 mm for summer season and the mean monthly soil moisture content was 23.46% for kharif season and 12.95% for summer season. The soil was acidic with low in available N, P and K content. Significant variations in root parameters, phosphorus uptake and utilization efficiency, and yield attributing parameters were recorded in all the genotypes. The genotype Pusa Baisakhi was found to be the highest seed yielder during kharif season, which was followed by Pant Moong 4, Pratap, SGC 25 and SGC 20. The genotype Pusa Baisakhi showed the highest value for longest root length, root surface area, root volume, nodule numbers per plant, nodule dry weight, number of pods per plant and harvest index. On the other hand, during summer season the genotype SGC 25 was found to be the highest seed yielder followed by SGC 20, Pusa Baisakhi, Pant Moong 4 and Pratap. The genotype SGC 25 was found to record highest value for root volume, nodule dry weight, phosphorus uptake and utilization efficiency, number of pods per plant and harvest index. A significant and positive correlation of root surface area, root volume, nodule numbers per plant, nodule dry weight, phosphorus uptake efficiency, phosphorus utilization efficiency, number of pods per plant and harvest index with seed yield was found both during kharif and summer season. On an average during kharif season 27.21% higher seed yield could be obtained compared to that of summer season.
Authors and Affiliations
LOLESH PEGU
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