Impact of Agricultural Practices on the Botanical Composition Changes and Nutritional Value of Natural Grassland, Type Agroseietum Vulgaris

Abstract

Abstract. Natural meadows and pastures are spread over 50% of agricultural land in Bosnia and Herzegovina and represent the most important resource in the forage production of hilly and mountain areas. The quality of roughage in the ration is very important for the efficient production of meat and milk in cattle and sheep production. Hay is a feed, that has the most variable chemical composition and nutritional value due to the influence of weather conditions, agricultural practices, harvest time and other factors. In this study, the impact of agro-technical measures, harrowing, fertilizing and harvest time on the forage yields, botanical composition and nutritional value of natural grassland, type Agroseietum vulgaris, in Sljivno in Manjaca mountain, were analized. Applied agricultural practices influenced the increase in the proportion of grasses and legumes, which contributed to the improvement of the feed quality. The highest average yield of hay was achieved by applying basic fertilization, two nitrogen applications and harrowing (3.48 t ha -1 ). All applied agro-technical measures had a positive effect compared to the control group, and the highest yield was 44% better than the control group.

Evaluation model of major heavy metals pollution factors in coastal waters and sediments

“…The contents of Cu, Pb, Zn and Cd are determined by atomic absorption spectrometry, and the contents of Hg and As are determined by atomic fluorescence spectrometry [15][16][17][18][19]. According to the measured contents of different heavy metal factors, the proposed model is used to calculate the corresponding parameters to evaluate the main heavy metal pollution factors in coastal waters and sediments [20][21][22][23].…”