Comportamento de cultivares de milho verde em ecossistema de várzea e terra firme no estado do Amazonas.

Abstract

The study aimed to evaluate the performance of eight maize cultivars with characteristics for consumption on the green stage of maturation and verify the adaptability of upland ecosystems and wetlands in the environmental conditions of the cities of Manaus and Iranduba in Amazonas State. The experiments were conducted in a randomized complete block design with factorial arrangement 2 x 8 x 5 and four replications. The treatments were defined by eight maize varieties in two ecosystems and five harvest times during different stages of maturation. Variables were evaluated for agronomic and sensory characteristics as well as aspects of marketing. Data were subjected to analysis of variance and means were compared by Duncan test at 5% probability. In upland and lowland cultivars was no significant difference by F test at 5% probability, for productivity. The plant stand is presented in greater variety (BR 5110) 56875 pl ha-1 and lower in the hybrid (HTMV1) 43,611 pl ha-1 on land. In the lowland hybrid (HTMV1) had the lowest stand with 47,709 pl ha-1 and variety (BR 5110) with the largest booth 72,292 pl ha-1. The length of the spikes differed statistically by F test at 5% probability on firm ground, and the varieties (and Saracura Cativerde) at greater length 17.81 cm and 16.09, respectively. The number of commercial ears was significant by F test at 5% probability on firm ground, and the hybrids (AG 1051 and HTMV1) had the highest and lowest numbers of spikes 42,708 and 34,167, respectively. Floodplain, the results did not differ by F test at 5% probability, as the sweetness and texture. As for brix, tenderness, flavor and color differ statistically by F test at 5% probability. On land, the results were statistically different as to color and brix. The corn is an excellent crop for the state of Amazonas, which can be grown in lowland ecosystems and land, with options to use varieties and hybrids according to the technological level of the farmer.