Abstract
ABSTRACT The phenology and water demand of crops can be altered by climate change. The objective of this study was to evaluate the impacts of climate change (temperature and relative humidity) on the development and evapotranspiration (ETc) of watermelon cultivare (Citrullus lanatus Schrad) in irrigated plantations in the Brazilian semiarid region. The experiments were conducted at the Rafael Fernandes Experimental Farm, in the municipality of Mossoró, RN, Brazil. The first experiment was carried out from February to April 2006, evaluating the cultivar Mickylee. In the second experiment, carried out from September to November 2009, the cultivar Quetzali was used. Two climate change scenarios were evaluated based on the Intergovernmental Panel on Climate Change (IPCC) report: an optimistic one named B2 and a pessimistic one named A2. It was found that climate change may cause reductions in crop vegetative cycle of 14.1 and 26.9% for the cultivar Mickylee and 7.9 and 11.1% for the cultivar Quetzali, for the optimistic and pessimistic scenarios, respectively, compared to the current climate scenario. Future climate changes will increase the watermelon crop coefficient (Kc), for the conditions under which the present study was carried out, increasing the daily ETc the total ETc, mainly for the cultivar Mickylee. Future climate changes in air temperature and relative humidity will reach limits above those tolerated by the crop, which will lead to changes in the cultural practices and irrigation management.
Highlights
The impacts of climate change on food security represent important challenges for the world population and directly involve the agricultural sector (KASTNER et al, 2012; NELSON et al, 2014)
The search for increasing food production makes this scenario a worrying one, since the growth of the agricultural sector contributes to intensifying the emissions of greenhouse gases (GHGs) (BEDDINGTON et al, 2012)
The use of computer models to simulate the responses of the main agricultural crops in the face of future climate change scenarios enables planning and decision-making management in the agricultural sector, saving time, work and amount of resources (SILVA; SILVA; AZEVEDO, 2012)
Summary
The impacts of climate change on food security represent important challenges for the world population and directly involve the agricultural sector (KASTNER et al, 2012; NELSON et al, 2014). The Intergovernmental Panel on Climate Change (IPCC) points out that the negative impacts of climate change on agricultural production are already being observed in different regions of the planet, such as reduced crop yield. This fact raises concerns, since the demand for food tends to increase by 2% in the decades, especially in developing countries, due to the expectation of population growth and improvement in the economic conditions of several countries (SCHEMBERGUE et al, 2017). The use of computer models to simulate the responses of the main agricultural crops in the face of future climate change scenarios enables planning and decision-making management in the agricultural sector, saving time, work and amount of resources (SILVA; SILVA; AZEVEDO, 2012)
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call