Avaliação da sensibilidade das fases vegetativa e reprodutiva do amendoim - arachis hypogaea l. ao stress hídrico

Abstract

The cultivation of peanuts ( Arachiz hypogaea L.) in Mozambique is mostly practiced by the family sector in a rainfed regime, therefore, water stress is one of the biggest constraints for its production since the rains are generally erratic and irregular. the certainty of its beginning, end and duration. Thus, it is important to know the phase that is most sensitive to water stress so that the culture and cultural practices can be properly managed in order to obtain high yields. Therefore, the trial was conducted in the experimental field of the Faculty of Agronomy and Forestry with the aim of evaluating the sensitivity of the vegetative and reproductive phases of peanuts (Arachis hypoagaea L.) var. Christmas common to water stress. The design used was randomized complete blocks arranged in split plots with water management in the main plot and the development phases in the sub-plot with 8 replications. Water stress was imposed in the vegetative and reproductive phases by interruption of supply for a period of 20 days. Water stress reduced grain yield, number of pods per plant and grain yield when it occurred during the reproductive phase than during the vegetative phase. Showing that the reproductive phase is more sensitive to stress.