BIOMASS AND LEAF AREA OF Eucalyptus citriodora AND Eucalyptus grandis SEEDLINGS AS AFFECTED BY WATER CONTENT IN SOIL AND ASSOCIATION WITH Brachiaria brizantha
Abstract
The effect of Brachiaria brizantha on leaf arca and biomass production of Eucalyptus citriodora and E. grandisseedlings, grown in soils with different water contents, was evaluated under greenhouse conditions. Treatments were arrangedin factorial design, with four replications (2x3x4): two species of eucalyptus (E. citriodora and E. grandis), three watercontents (20, 23 and 26% mass), and four B. brizantha populations (0, 1, 2, 3 plants per pot). Moisture content in the potswas maintained constant until experiment harvest, 70 days after seedlings transplanting. B. brizantha showed a negativeinfluente on E. citriodora and E. grandis seedlings developent, when grown in the three water contents. However, there wasa higher effect when growth was under the best water conditions (26%), especially in presence of two to three plants of B.brizantha. E. citriodora was more sensitive to the interaction of water content and B. brizantha populations.
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