The studies on physiological variation for growth causing yield differences in sixteen diverse genotypes of blackgram conducted during Kharif 2000. TAU-1 & AKU-7 are the high yielding genotype along with considerable amount of dry matter accumulation upto 50 DAS Another high yielding genotypes UTC-55 had shown better performance for dry matter accumulation along with high magnitude of AGR, PGR and NAR. The rapid increase in AGR at 30–40 days appears due to rapid increase in dry matter accumulation. The high magnitude of PGR was recorded at 40–50 Days after sowing may be due to higher rate of dry matter accumulation towards pod development. The NAR decreased towards pod filling stage and again increased towards maturity may be due to increased efficiencies of leaves owing to higher demand for growing seeds. The LAI increased with the advancing age of the crop upto 60 days after sowing and declined towards maturity due to leaf senescence and heavy demand for reproductive stage.
Physiology, growth, black gram
