Eficiência operacional e regularidade de distribuição de plantas na semeadura do arroz irrigado

Abstract

With agriculture in constant growth and increasingly unstable weather, the time for agricultural operations in the recommended period becomes shorter, resulting in a demand for agricultural machinery with greater technology and efficiency in operations. In this sense, for everything to happen within the expected time, it is important that a good planning of the activities is done, maximizing the use of the equipment, making its use more feasible and economical. Sowing is one of the most critical stages of agricultural production, since it determines the other factors of production along the crop cycle, it is important to perform it at the time and recommended way. In this context, the present work aimed to determine the operational efficiency of a seeder-fertilizer and the regularity of distribution of plants in irrigated rice seeding. For this, an experiment was carried out divided in three phases, where in a first moment the operational efficiency was calculated in fields with different width and length relationships, in the second phase, the efficiency in random plots determined by the condition of the crop was calculated and, finally, the distribution regularity of the plants was analyzed at four different sowing speeds: 3,67; 4,88; 7,16 and 9,67 km h-1, measuring the distance between plants after emergence and calculating the uniformity of distribution. Based on these experiments, there was an operational efficiency between 78,48% the 59,88% in the first case, in the second experiment carried out in random plots the operational efficiency reached values close to the first experiment and the values obtained from 77,31% the 69,20%.