Crescimento e produção de algodoeiro de fibra colorida em solo com distintas PST e adubação orgânica.

Abstract

The sons of arid and semiarid regions naturally contam soluble salts and/or exchangeable sodium, that can slgnificantly reduce development and crops productivity, however, the greatest problema of salinization and/or sodification are represented by previously productive sons, which due to inadequate irrigation management become saline, being necessary to treat them for that these recover their productivity. Thereby, various methods can be employees in the recovery of these sons, being the introduction of tolerant cultivars, such as cotton colored, one of the most effective ways of minimizing this problem, in addition, of use chemical enhancers, but due to the high cost of these, as well as their availability, the use of gypsum and organic material has excelled. Thus, the aim of this work was to evaluate the cultivation of cotton of fiber colored BRS Topaz. when grown in soir with different exchangeable sodium percentages (PST) and caule manure in greenhouse of CCTA/UFCG. We used the completely randomized block design in factorial 5 x 4, with 3 repetitions. Were tested ave leveis of PST and four levei of caule manure were evaluated the growth variables: plant height (AP), stem diameter (DC) at 55 and 75 DAS and leaf área (AF) at 75 DASI - Fresh phytomass and dry of the shoot, the 134 DASI and production variables: number of bolas per plant (NCC)l Feather weight and seeds per planta Fiber percentage and reliability index. The cotton colored BRS topaz is tolerant to sodium exchangeable and can be grown in soil with PST up to 30% and the use of caule manure was efficient in cotton cultivation BRS Topaz in sodic sons.