Uso regulado do déficit de irrigação nas fases de crescimento de frutos de lima ácida ‘Tahiti’, irrigado por microaspersão.

Abstract

Yield of Tahiti acid lime irrigated by microsprinkler was evaluated under different levels of soil water deficits applied during three fruit growth phases at Jaiba Irrigation Project, North of Minas Gerais. The treatments were applied during flowering and fruit set (phase I), fruit development growth (phase II) and final growth of fruits (phase III). The treatments were: T0 - 100% ETc in all development phases; TR50 - 50% ETc in all phases; T1 - 100% ETc during phases II and III and 55% of ETc during phase I; T2 - 100% ETc during phases I and III and 55% of ETc during phase II; T3 -100% ETc during phases I and II and 55% of ETc during phase III; T4 - 100% ETc during phases II and III and 70% of ETc during phase I; T5 - 100% ETc during phases I and III and 70% of ETc during phase II; T6 - 100% ETc during phases I and II and 70% of ETc during phase III; T7 - 100% ETc during phases II and III and 85% of ETc during phase I; T8- 100% ETc during phases I and III and 85% of ETc during phase II; and T9 - 100% ETc during phases I and II and 85% of ETc during phase III. This study showed that it is possible a decrease of water depths recommended to ‘Thaiti’ acid lime without loosing significant productivity. There was a tendency of the deficit to be less critical with the delay of its application at the phase I. The deficits of 45% at phases I and II were the most critical and proportional to TR50.