Productive Capacity of Maize Silage Grown under Different Irrigation Regime

Abstract

During the period 2009 – 2012 in the experimental field of Agricultural Institute, Stara Zagora. Field experiment was conducted with the first crop silage maize. Tested the following variants: 1) Without irrigation (control), 2) Optimal irrigation (100% irrigation rate – 60 mm), 3) Irrigation in furrow irrigation with 100% rate (60 mm) in each furrow, 4) Each furrow irrigation with 60% of irrigation rate (36 mm), 5) Each furrow irrigation with 40% of irrigation rate (24 mm). It was found that the highest crude protein than maize silage comes from irrigated optimal variant both variants without fertilization, and in that of applied fertilization, respectively 100.4 kg/da and 124.9 kg/da. Under irrigation with 60% of the calculated irrigation rate yield without variant reduced of 23.2%, and 30.8% fertilization. At – heavily reduced irrigation rate (24 mm) yield without variant reduced by 39.1%, and 42.9% fertilization compared to optimal irrigation variant.