Avaliação agrometeorológica do feijoeiro.

Abstract

The research work was conducted at the Experimental Station of Lagoa, Seca, located in the Empresa Estadual de Pesquisa Agropecuaria da Paraiba, EMEPA-PB, with the objective of identifying the consequences of soil moisture content, on the growth variables, yield components and components of water stress, in a bean (Phaseolus vulgaris L.) crop. The statistical design used was the randomized blocks, with three treatments and four replications. The effects of the different treatments were evaluated by the variations of the distribution of the total dry mass drought, leaf area, leaf area index and the components of incomes. The growth variables presented values differentiated in response to the employed treatments. The environmental conditions were favorable for the development growth of cultivating Pearl, completing the cycle in 85 days. The treatment Tl presented the largest tax of production of total dry mass along the cycle and also larger leaf area index, evidencing larger capacity in capturing light. The shadowing didn't allow that the larger densities (treatment T3) they accumulated larger amount of dry mass, for the influence of the temperature and global solar irradiation. The durations of the development phases were not affected for the treatments, what demonstrates the reliability of the degree-day approach for the determination of the phonological stages of the crop. The largest incomes in grains of the bean plant are obtained in the population density of 320 thousand plants by hectare, in other words, in the treatment T3, that due a compensatory effect in the income of grains, because of the increase of the population of plants for area and of the increase o f the mass of the seeds.