Estudo da variabilidade sazonal da precipitação e da sobrevivência de mudas do umbuzeiro (Spondias tuberosa Arruda Cam.) enxertadas em uma área de enriquecimento de caatinga no Semiárido Paraibano.

Abstract

The study aimed to monitor the survival of grafted seedlings and its relation to seasonal factors of rainfall in an area of Caatinga in Western Cariri of Paraíba. The experiment was executed in Area Reserved Experimental Area for Studies of Ecology and Dynamics of the Caatinga of the Laboratory of Ecology and Botany - LAEB/CDSA/UFCG (7°39'38.8 '' S and 36°53'42.4 '' W; 538 m of altitude; 1,02ha). Seedling planting was done in the middle of native vegetation with doing only pruning branches, taking advantage of the existing natural clearings. The average spacing between individuals was 12 x 12 m and grafting method adopted was grafting the top cleft in ungrafted. Thus, 70 patients were implanted in July 2011. After a year of monitoring was observed that only 29 individuals survived, due probably reduced rainfall that hit the Brazilian semiarid region in this period. Rainfall below the regional average remained in 2013 resulting in reduced survival values that were 44 seedlings, of which six of the initially deployed in 2011 and 38 responses. Therefore, the data proffer a significant contribution of knowledge about the ecology of umbuzeiro.