Desenvolvimento inicial e tolerância de espécies de pimenta ao estresse salino.

Abstract

Salinity is a major cause of yield loss of crops in arid and semi-arid regions, requiring the adoption of management strategies that facilitate the cultivation in these regions, the use of crops tolerant species in this region. The objective was to study the emergence, early growth and tolerance of pepper species subJected to irrigation with saline water. The experiment was conducted in a protected environment (greenhouse) of the Center for Science and Technology Agrifood - CCTA Federal University of Campina Grande - UFCG, located in the municipality of Pombas, Paraíba, PB. The treatments were formed from a factorial 5 x 3, using four replicates and ülve planta per plot, totaling 300 experimental planta, a comptetely randomized experimental design, for ave leveis of irrigation water salinity (0, 6; 1 .2; 1 .81 2.4 and 3.0 dS m-l) and three pepper species (EI -- Caos/cum annt/m ("Doce Comprida')l E2- Caos/cum /}ufescens ("Malagueta"); E3- Caos/cum ch/nesse ("De Bico'». The pepper plants were cultivated in trays 30 ballots capacity of O.l dm3 substrate during the first 30 days after sowing. During this period, the plants were monitored for the emergence, early growth, the accumulation of dry matter and through the tolerance to salinity. The increase in water salinity reduces the emergence, growth and biomass accumulation of pepper plants. The peppers Sweet Long, "Malagueta" and "De Bico" tolerate ECw up to 1.78, 2.71 and 1.55 dS m'l, respectively. The pepper "Malagueta" is the most tolerant to salt stress, and "De Bico", is the most sensitive to salt stress among the species studied.