The research studied the association between irrigation levels and types of substrate utilizing organic waste compost, in the production of orange trees. A randomized block experiment design with split plots, with four repetition, three levels of irrigation and five types of substrate was used. The substrates were: 100% pine bark, 80% pine bark + 20% organic waste compound, 60% pine bark + 40% organic waste compound, 20% pine bark + 80% organic waste compound, and 100% organic waste compound. The irrigation levels were 50%, 100% and 150% the evaporation of modified atmometer, and the irrigation was done by dropping system. The development valuation was done fortnightly, been measured diameter and height of the plant. The results showed that, orange trees need different levels of water in different stage of development and types of substrate, the substrate 3 (60% pine bark + 40% organic waste compound) detached from the others because it gave better condition to development of the plant roots and disposal of nutrients by decomposition of organic waste compost. The irrigation 3 (150% the evaporation of modified atmometer) propitiated better development to orange trees.
irrigation; substrate; orange tree
