Performance of Mungbean Under Irrigated Conditions: Physiological Parameters Determining the Yield During Crop Growth

By : Pushp Sharma

Page No: 147-152

Abstract
Growth parameters like leaf area(LA), crop growth rate (CGR),relative growth rate(RGR) and net assimilation rate (NAR) were compared in four varieties of mungbean under subtropical conditions to identify growth limiting characters for efficient application of physiology breeding for higher yields. Analysis of yielding ability and growth pattern of mungbean genotypes procured from Asian vegetable research development centre (AVRDC) revealed significant differences in morphphysiological traits during crop growth. The maximum chlorophyll and leaf area was recorded at 60DAS. Peak flowering and pod development phase coincided with leaf area development. Significant differences in leaf characteristics existed for leaf weight ratio (LWR), leaf shoot ratio (LSR) and leaf area ratio (LAR) at 60 and 75 DAS whereas growth rates like net assimilation rate (NAR), crop growth rate (CGR) and relative growth rate (RGR) were high at 45-60DAS. Sources could adjust to some extent to higher requirement of its sink, indicating a strong inverse relationship between flower production and their subsequent shedding. NAR, CGR, SLA, LAR are the desirable traits to be exploited for higher productivity.

Authors :
Pushp Sharma : Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, India.