Adubação orgânica com estercos bovino e ovino em videiras 'merlot' no município de Dom Pedrito-RS

Abstract

Many vineyards are on soils that have some nutritional limitation, where fertility corrections are necessary for plants to express their productive potential. For that, pesticides are used, which, over time, can lead to contamination to soil, water and plants. Organic fertilization is an alternative to reduce the cost of synthetic fertilizers, improving the chemical, physical and biological attributes. Therefore, the objective of this study was to evaluate the effect of organic fertilizer with cow manure and sheep on the growth and chlorophyll total, chlorophyll a and chlorophyll b content of 'Merlot' vines grafted on three different rootstocks. The experiment was conducted by the Nucleus of Study, Research and Extension in Oenology (NEPE²) in the experimental vineyard of the Federal University of Pampa (UNIPAMPA)-Campus Dom Pedrito. The treatments were: T1: 'Merlot' clone VCR1/rootstocks '161.49'; T2: 'Merlot' clone VCR1/rootstocks '161.49' + 1Kg of bovine manure; T3: 'Merlot' clone VCR1/rootstocks '161.49' + 1Kg of ovine manure; T4: 'Merlot' clone VCR1/rootstocks '161.49' + ½Kg of bovine manure + ½Kg of ovine manure; T5: ‘Merlot’ clone VCR1/rootstocks ‘420A'; T6: ‘Merlot’ clone VCR1/rootstocks ‘420A' + 1Kg of bovine manure; T7: ‘Merlot’ clone VCR1/rootstocks ‘420A' + 1Kg of ovine manure; T8: ‘Merlot’ clone VCR1/rootstocks ‘420A’ + ½Kg of bovine manure + ½Kg of ovine manure; T9: ‘Merlot’ clone VCR1/rootstocks ‘Paulsen 1103’; T10: ‘Merlot’ clone VCR1/rootstocks ‘Paulsen 1103’ + 1Kg of bovine manure; T11: ‘Merlot’ clone VCR1/rootstocks ‘Paulsen 1103’ + 1Kg of ovine manure; T12: ‘Merlot’ clone VCR1/rootstocks ‘Paulsen 1103’ + ½Kg of bovine manure + ½Kg of ovine manure; T13: ‘Merlot’ clone CR18/rootstocks ‘SO4’; T14: ‘Merlot’ clone CR18/rootstocks ‘SO4’ + 1Kg of bovine manure; T15: ‘Merlot’ clone CR18/rootstocks ‘SO4’ + 1Kg of ovine manure; T16: ‘Merlot’ clone CR18/rootstocks ‘SO4’ + ½Kg of bovine manure + ½Kg of ovine manure; T17: ‘Merlot’ clone CR18/rootstocks; T18: ‘Merlot’ clone CR18/rootstocks ‘161.49’ + 1Kg of bovine manure; T19‘Merlot’ clone CR18/rootstocks ‘161.49’ + 1Kg of ovine manure; T20: ‘Merlot’ clone CR18/rootstocks ‘161.49’ + ½Kg of bovine manure + ½Kg of ovine manure; T21: ‘Merlot’ clone FVA351/rootstocks ‘Paulsen 1103’; T22: ‘Merlot’ clone FVA351/rootstocks ‘Paulsen 1103’ + 1Kg of bovine manure; T23: ‘Merlot’ clone FVA351/rootstocks ‘Paulsen 1103’ + 1Kg of ovine manure; T24: ‘Merlot’ clone FVA351/rootstocks ‘Paulsen 1103’ + ½Kg of bovine manure + ½Kg of ovine manure. 8 It was performed four applications of decomposed manure around the vines. The evaluated parameters were: plant height (cm); chlorophyll total; chlorophyll a; and chorophyll b (Falker clorofiLOG®). It was held the analysis of variance (ANOVA) and when necessary the comparison test of Tukey averages at 5% of probability. With the results obtained from the analysis performed, it can be said that with the application of organic fertilizers of animal origin, the ‘Merlot’ vines, independent of clones and rootstocks, had the highest levels of chlorophyll total, chlorophyll a and chlorophyll b, and greater height when compared without application of organic fertilizers.