Evaluation of Temperature Modification in Open Top Chambers in Mustard Cultivars and its Effect on Yield and Percentage Content of Nitrogen and Sulfur

The present study was conducted during rabi season in the your of 2021-22. The experiments were conducted in open top chambers established in the research area of Department of Environmental Science, College of Agriculture, RVSKVV, Gwalior have uniform topography and adequate drainage conditions. The trial was laid out in a two way factor anova with three replications. It was consisting of five elevated/ambient temperature viz., ambient in OTC, ambient+1oC, ambient+1.5oC, ambient+2oC, Open field (control) and two mustard cultivars at varied crop geometry i.e., RVM2 (45x10 cm & 25x20 cm) and Giriraj (45x10 cm & 25x20 cm). The result of the study indicated that significantly higher no. of siliqua per plant, no. of seed per siliqua, length of siliqua (cm), 1000 seed weight (g), total biomass (q/ha), seed yield (q/ha), harvest index (%), nitrogen content (%) and sulfur content (%) was obtained at ambient +1oC which were significantly superior over rest of the ambient temperature and open field control (OTCs) conditions. Maximum no. of siliqua per plant, no. of seed per siliqua, length of siliqua (cm), 1000 seed weight (g), total biomass (q/ha) and seed yield (q/ha) was observed with mustard cultivar of Giriraj (45x10 cm) except harvest index (%) and sulfur content (%), respectively.