Efeito alelopático de extrato de falsa murta sobre alface

Abstract

Lately, is has been observed an increase in the concern related to the urban environment and the quality of life in our cities. Therefore, it is remarked that afforestation is essential to any urban planning and performs important functions in the society and the environment. With the need for management of the tree crowns, and further use of this waste, it becomes necessary a study of the possible allelopathic effect that the pruning waste can cause on plants. Aiming to find out if there is any effect and thereby suggest an alternative to the urban pruning waste, it is necessary to evaluate its effect on an indicator plant. The effect of Murraya paniculata was evaluated in Lactuca sativa (lettuce). Thus, germination test, germination speed index determination, as well as plant shoot and rood system measurement were performed in seed germination boxes with concentrations of 0% (control), 1%, 5% and 10% of aqueous raw extract. The effect on plants was evaluated through lettuce seedlings growing in commercial substrate and using dry crushed Murraya paniculata to assess the behavior of the plant also under these same concentrations of Murraya paniculata, for which the fresh root and shoot weight, dry root and shoot weight, as well as leaves number at the harvest point were evaluated. he extracts elaborated from false myrtle (Murraya paniculata) presented an inhibitory effect of the rate of germination speed in the B.O.D. camera, being the treatment with 10% of extract that presented the highest significance of inhibition. There was also a decrease in radicle length in 10% extract treatment. In the other tests it was observed that there was no negative interference of the vegetation house.