Effect of Ulva rigida as crude and formulated extract on vineyard growth at an early stage
Abstract
A. Mohammedi*, B. Zebib, S. Atika, O. Merah and Z.E. Djazouli
Following the ecological waves that requires chemical restrictions to assure sustainable agriculture, trash from marine lifeis used as fertilizer: Ulva rigida one of the species no documented as a bio stimulant on young stage of vine, so for that we have used it to prepare a crude extract, where the quantity of algae is reduced to 70% and 60% in order to get Formulation 1 (F1) and Formulation 2 (F2) by adding surfactants. Those bio-products are diluted according 8 ml/L (v/v) and evaluated by foliar application at 50mL per plant, when nine leaves well developed (stage 11 of BBCH scale) to evaluate growth and photosynthetic parameters compared to the control (water). Our results shows that all treated vines in the early stages with seaweed extract (CRUDE EXTRACT, F1 and F2) increased growth parameters. Indeed, the dry weight was enhanced by 50% for both formulations compared to control (water), when the higher amount of leaf area showed for F2. Total pigmentations were enhanced by the F2 35.61 (mg/g FM) after the crude extract 40.37 (mg/g FM) treatment which had the double value compared to the untreated sample. The formulation composition secure the bioactive compounds of the crude extract with a double efficiency on some parameters, a potential way to get cheap foliar fertilizer and help to develop ecologically sustainable agricultural systems. The current study can open up a various investigations to examine the effect of these extracts and formulations on grapevines at different ages, their impact on growth and yield on vine, even on others crops.