Componentes de rendimento de cártamo submetido a diferentes durações de estresse hídrico

Abstract

The safflower (Carthamus tinctorius L.), belonging to the family Asteraceae, is native of Asia where it is grown for thousands of years. The primary use of edible oil such as safflower is because it has high levels of oils in their seeds. The safflower is a plant that offers high resistance to drought, high temperatures, high winds and hot, and low relative humidity. The aim of this study was to determine grain yield and its components of safflower in different durations of drought and excess soil water. Two experiments were conducted with buckets of PVC in a greenhouse with different durations of water stress (drought and excess). The experimental design was completely randomized with four durations of excess water (0, 5, 10 and 15 days) and five duration periods of drought (0, 5, 10, 15 and 20 days), with 4 replicates making 36 buckets of PVC. Two weeks after emergence were demarcated four plants per bucket, where it was determined the components of yield (number of chapters plant-¹ , number of seeds chapter-¹, seed yield plant-¹ and weight of 1000 seeds). In conditions of excess water was sharp decline in grain yield components. Already in water deficit is observed that the culture of safflower does not withstand drought stress periods less than 20 days.