Effect of Weather Parameters and Nutrient Uptake on Production of Rabi Sorghum- A Statistical Analysis
Loading...
Date
2016-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Science, Dharwad
Abstract
Sorghum (Sorghum bicolor L. Moench) is one of the main staple crops for the world's poorest and most food-insecure people. It is considered as king of millet and “Camel crop”. The research data for sorghum was collected based on the experiment conducted by All India Co-ordinated Research Project (AICRP) on Sorghum and meteorological data (on maximum temperature, minimum temperature, rainfall, relative humidity at morning and relative humidity at evening) were collected from meteorological observatory at Main Agricultural Research Station, UAS, Dharwad from 2011 to 2014. The technique of model fitting, simple linear regression, multiple linear regression, factorial design and path analysis were adopted to study the fluctuations, impact of weather parameters and fertilizers on rabi sorghum yield.
For rabi sorghum yield, plant height and 100 seed weight, cubic and quadratic models were found to be significant. In case of multiple linear regressions, among the weather parameters, maximum temperature was contributing significantly and negatively to the yield of sorghum and rainfall was significantly and positively contributing to the yield of sorghum. In case of multiple regression on recommended dose of fertilizers, plant height and 100 seed weight were significantly contributing to the yield of rabi sorghum when 100 per cent RDF was applied.
Path analysis for yield of sorghum revealed that all the characters such as plant height and harvest index had positive correlation with yield. Plant height and 100 seed weight had direct effect on yield of rabi sorghum. The 100 seed weight and harvest index have exhibited indirect positive effect on the yield. The total indirect effect of plant height was negative. The study indicated that there is a genuine relationship between plant height and 100 seed weight with rabi sorghum yield.