Crescimento, desenvolvimento e balanço de radiação do algodoeiro herbáceo BRS-201 em condições irrigadas.

Abstract

The experiment was carried out in the experimental field of the National Center of Research of the Cotton of the Brazilian Company of Agricultural Research in Barbalha-CE (07°18'39 "S; 39°23'39 "W; 415,7m) from August to December 2001, with the objectives of evaluating the growth and development of the irrigatea cotton cultivar BRS-201, with the objectives of evaluating the growth and development of the irrigatea herbaceous cotton cultivar BRS-201 warder conditions that soil and climate of Cariri, Ceara State and to establish the radiation balance on the culture. The growth analysis was accomplished through the Foliar Área Index, Rates of Absolute and Relative Growth and of the Culture, even of the rate of liquid Assimilation; the radiation balance growth was established through the of shot and long waves balance. Foliar Área Index reached a maximum it value of 3,7, the Absolute Growth Rate reached 2,4 g/dia. The reflectireity of the culture varied from 0.10 to 0.24. The solar radiation reached 1700w/m2, and on this day the instantaneous radiation a maximum value balance was of approximately equal of 800w/m2 , allowing a good growth and development of culture. The final yield of culture was equal to 5.176 kg/ha"1.