Fertilisation impact on total fibre content of a Banat hill grassland spontaneous flora in spring

Abstract

This study was conducted to estimate that organic fertilisation with sheep manure or mineral fertilisers had impact on the total fibre content in spring of spontaneous flora which covered a hill permanent grassland situated on a Calcic Luvisol in Romanian Banat County. The experimental field was organised respecting the complete randomised block design with five replications for each trial. The trial surface was 25 m2 . The total fibre content was determined using Weende method (AOAC method 962.09, Edition 15/1990). For these research it was selected a number of seven trials with different fertilisation (mineral or organic) and it was computed a multivariate analysis technique model based on Principal Components & Classification Analysis (PC&CA), using as active variables: fertilisation data; soil ecological parameters; and total fibre content of grassland spontaneous plants harvested in the middle and at the end of May 2008. As supplementary variables were used data of individual contribution (%) to the hill grassland spontaneous covering biomass of: Festuca rupicola, Calamagrostis epigejos, Trifolium repens, Inula britanica and Filipendula vulgaris. The percent of individual participation of selected spontaneous plants species in hill permanent grassland flora was determined gravimetrically. The first two principal components, PC1 and PC2, explained around 85% of total variance of PC&CA model. The analysed data have shown that in clime and soil conditions of May 2008 from Banat County, the mineral fertilisation had a high positive impact on total fibre content of spontaneous dominant grass from hill permanent grassland in both cases: in the middle and at the end of month.