Simulação da produtividade potencial e deplecionada de feijão-caupi

Abstract

Agricultural crops simulation models are tools that assist with decision making in the agricultural planning, management and research. Taking into account that cowpea productivity forecasting models are rare, the aim of this research was to perform the estimation of depleted and potential productivity of the cowpea crop based on the construction of an agro-climatic simulation model. The climate data used in the simulation model were temperature, precipitation and sunshine. The data were obtained in six cities in the state of Paraíba. In the proposed model it was performed an estimation of the cowpea leaf area to determine the photosynthetic and respiratory rates, with corrections of temperature, shading, senescence, CO2, followed by the partition of biomass, growth and development, as well as the simulation methods of climate variables for input in the model. The depleted productions were estimated through the water balance, from which the de- pletion coefficient was estimated. Based on the simulations performed with the proposed model, it can be concluded this can be used to predict the results of the depleted and potential c owpea production. It was also possible to determine the best regions and seasons for cowpea growing in the state of Paraíba.