Vol. 12, Issue 12 (2023)

Author(s):
PM Patil, PR Thombre, AB Thombre, DB Deosarkar and VB Gore

Abstract:
Soybean, a prominent leguminous crop, is predominantly cultivated in Maharashtra, contributing to a substantial 89% of the overall production. This study delves into the impact of foliar spray of NAA (Naphthalene Acetic Acid) on the growth, yield, and seed quality of soybeans at the Agricultural Technical School, VNMKV, Parbhani, during the Kharif season of 2021-2022. The research incorporates an examination of physiological growth analysis parameters, specifically AGR (Absolute Growth Rate), RGR (Relative Growth Rate), and NAR (Net Assimilation Rate). Notably, treatment T₉ (90 ppm NAA) demonstrated superior results compared to other treatments at 40-61 DAS (Days After Sowing). In terms of yield components, such as seed yield per plot, biological yield per plot, seed yield per hectare, number of pods, and length of pod, treatment T₉ exhibited the highest outcomes. Additionally, maximum harvest index was observed in T₆ (NAA 60 ppm). The study also delves into protein and oil content in seeds. Notably, a positive and significant correlation was identified between seed yield and various yield-contributing traits, including plant height, number of branches per plant, leaf area, total dry weight, number of pods per plant, length of pod (whether one, two, or three-seeded), Net Assimilation Rate (NAR), biological yield, and harvest index. However, Absolute Growth Rate (AGR) displayed a negative correlation. In summary, the foliar application of NAA showcased a profound influence on the growth, yield, and seed quality of soybeans, with treatment T₉ standing out in several key parameters during the specified Kharif season. Further exploration of these findings can contribute to optimizing soybean cultivation practices and enhancing overall crop productivity.