Impact of increasing temperatures on cereal crop productivity
Student name: Ms M. Aishwarya
Guide: Dr Chubamenla Jamir
Year of completion: 2018
Host Organisation: National Centre for Biological Sciences (NCBS)
Supervisor (Host Organisation): Dr Mahesh Sankaran
Abstract: Food is the most vital requirement of every being and the cereal crops are the most important source of nutrition to meet our basic requirements.
In this study I quantified global and national trends in cereal crop yield over the last 5 decades and investigated, the relationship between yield and other factors including area harvested and fertilizer addition. In addition, I also carried out a literature survey to investigate how temperature affects cereal crop yield under controlled conditions (greenhouse experiments). Although yields of all three cereal crops were higher on average in 2016 compared to 1961, greatest increases in yields of rice and wheat were observed in countries in which production was low in 1961. In contrast, changes in maize yields between 1961 and 2016 were unrelated to country wise yields in 1961.Similar trends were seen with the NPK content added to the crop. Mean temperatures were found to be positively correlated with the yield of rice and maize and maximum and minimum temperatures were as found to be negatively correlated with yield of all the crops.
(Keywords: Yield, temperature, effect, fertilizer, area harvested)
