RESEARCHES REGARDING THE ACTION OF SOME INFLUENTIAL FACTORS ON THE NUTRITIVE COMPOSITION OF THE CORN SILAGE

Roxana Miron (Zaharia), I.M. Pop, N. Zaharia, A.C. Sava

Abstract
The pourpose of the research was to show the influence of the ensilage on the chemical composition of corn silo. The material studied was corn silage from different silos respectively: SA - silage covered with waterproof foil, has been introduced corn in phase of wax maturity and SN - uncovered silage (covered with 20 cm of chopped straw) has been introduced corn in similar phase of maturity. Samples were collected from the surface of the silo (50 cm deep) CS1 and SN₁ , the laterally sides of the silo (70 cm from side walls) US2 and CS2, and from the centre of the silo US2 and US3. Following the calculations performed on samples collected from the silo were observed appreciable differentiations in terms of the DM (CS1 - 328.3 g/kg gross SN1 - 262 g/kg gross) and Ash (CS1 - 48 g /kg DM, SN1 -90.1 g/kg DM). CS2 and US2 content of samples varied for DM (CS2 - 244 g/kg gross, US2 - 319.8 g/kg gross), CP (CS2 - 72.3 g/kg DM, US2 - 96.3 g/kg DM ) and CF (CS2 - 254.2 g/kg DM, US2 - 228.9 g/kg DM). Tests on samples US2 and US3 showed a relative consistency in chemical composition compared with other samples. Chemical composition of studied silos were influenced by several factors as stage of growth at harvesting, silage technology, climatic conditions, factors that led to a decrease of quality of the pickled fodder studied.

Key words: corn silage, chemical composition, influential factors