TÜRK, Mevlüt Süleyman Demirel University - Faculty of Agriculture - Department of Field Crops, TURKEY , ALBAYRAK, Sebahattin Ondokuzmayis University - Vocational School of Bafra, TURKEY , BOZKURT, Yalçın Süleyman Demirel University - Faculty of Agriculture - Department of Animal Science, TURKEY

Determination of the Relationships between Crude Protein Content and Other Forage Quality Parameters in Grazed and Nongrazed Pastures by Correlation and Path Analysis

38707

This research was conducted to determine characters effecting crude protein content in different artificial pastures from the years 2010 to 2012 by using simple correlation coefficient and path analysis. Forage samples were collected from grazing and non-grazing areas once every 15 days during the grazing seasons. The crude protein (CP), acid detergent fibre (ADF), neutral detergent fibre (NDF) contents, in vitro dry matter digestibility (IVDMD), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and crude ash ratios were determined on the forage samples. The results showed that there were significant interrelationships between quality parameters and the crude protein content in grazing and non-grazing areas of pastures. Several traits affected the crude protein directly or indirectly. In nongrazed areas, P, K and Mg showed positive direct effect on crude protein whereas there were negative direct effects of NDF, ADF, IVDMD, Ca and ash on crude protein content. In grazed areas, ADF, IVDMD, P and K showed positive direct effect on crude protein whereas there were negative direct effects of NDF, Ca, Mg and ash on crude protein content.

207

ADF , Crude protein , Grazing , Correlation , Path analysis

Yuzuncu Yil University Journal Of Agricultural Sciences

213