Manejo e aplicação da irrigação deficitária na cultura da soja Glycine max L.

Abstract

The Irrigation is a fundamental technology for growth and development of Brazilian and world agriculture. A significant challenge of the irrigated agriculture is to produce safe food, using water efficiently, helping the increased of the “water productivity”. The use of management such as dificit irrigation can reduce the use of water and electrecity without harming productivity of the culture. The presente work combined a literature review that provided information about the possility of applying deficit irrigation in the culture of soybean. In soybean, the different levels of water deficit imposed influence more the grain yield in the first year than in the second, indicating a better adaptation of the plants to the deficit, reflected in the grain yield. The adoption of the management of deficit irrigation can be an alternative to take the best advantage of the water resource, but avoiding the phenological stages corresponding to germination-emergence (4 to 5 days) and in the flowering-grain filling phase. However, this needs further studies in different situations, for different genotype, and under different conditions.