Vol. 7, Issue 5 (2019)

The investigation was carried out on “Studies on the effect of Osmoprotectants on microclimate of soybean (Glycine max. L Merrill)” was designed and conducted at agricultural meteorological field in College of Agriculture, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani during Kharif. season of 2016.

The yield components viz., seed yield, stalk yield, biological yield, seed index were highest in treatment D1 (27th June). Among the Osmoprotectant spray S3 (Potassium Nitrate @ 2 %) produced higher yield and whereas lower yield was recorded in S1 (Control). It may be due to water stress condition created in the field, dry spell at the time of sowing. Osmoprotectants spray S3 (Potassium Nitrate @ 2 %) at 45 and 60 Days after sowing were significantly improved all growth parameters, yield attributes over rest of treatments except S4 (Potassium Schoenite @ 2 %). The Osmoprotectant spray S3 (Potassium Nitrate @ 2%) recorded highest yield (1341 kg/ha) as compared to other Osmoprotectants spray.

The total Growing Degree Days (GDD) recorded during total crop growth period was highest in D1 (27th June) i.e. 57.9 0C as compare to remaining treatments. In case of Osmoprotectants spray S1 (Control) recorded highest total GDD i.e. 57.71 0C as compare to remaining Osmoprotectants spray. Whereas lowest total GDD was recorded in D3 (25th July) i.e. 56.82 0C. It may be due to different dates of sowing.