Сравнително изпитване на биопрепарати, съдържащи хумусни субстанции, при царевични хибриди | А Comparative Study for the Impact of Bio Products Containing Humic Substances on Maize Hybrids

bulgare. Field experiments on maize hybrids Kn 435, Kn 509, and Kn M625 with humus substances took place in the Maize Research Institute in Knezha in 2008-2009. The following specialty fertilizers, produced by Advanced Nutrients Itd — Canada and ROMB Ild — Bulgaria were used: Plantagra™ (PL), B-52™, MOTHER EARTH SUPER ТЕА BLOOM™ (ME), and Nirvana™ (Nir). The fertilizers were administered by foliar feeding in the 8-10 leaf phase. Them rate of introduction was 50 ml/ha for each iteration. Two additional fertilizer rates were tested оп Kn 435 — 80 ml/dа and 120 ml/da. The results show that treating with B-52 increases yield of hybrid Kn 435 by 18.47%, while treatment with PL 120 ml/da increases yield by 12.27%. Similar results were obtained using Nir (12.62%). Treatment with МЕ increases yield between 3.06% аnd 8.6%. Especially clear is the trend of increasing protein content in the range of 2.27% to 18.62% оп the tested hybrids. Best results for increasing the protein content are obtained after treatment with Nir (29.52%). The hybrid Kn 509 responds best when treatment is done with B-52 (11.64% above the control) and shows the least increase in lipids content on 625 Kn M625 (5.8% — B-52).

anglais. Field experiments on maize hybrids Kn 435, Kn 509, and Kn M625 with humus substances took place in the Maize Research Institute in Knezha in 2008-2009. The following specialty fertilizers, produced by Advanced Nutrients Itd — Canada and ROMB Ild — Bulgaria were used: Plantagra™ (PL), B-52™, MOTHER EARTH SUPER ТЕА BLOOM™ (ME), and Nirvana™ (Nir). The fertilizers were administered by foliar feeding in the 8-10 leaf phase. Them rate of introduction was 50 ml/ha for each iteration. Two additional fertilizer rates were tested оп Kn 435 — 80 ml/dа and 120 ml/da. The results show that treating with B-52 increases yield of hybrid Kn 435 by 18.47%, while treatment with PL 120 ml/da increases yield by 12.27%. Similar results were obtained using Nir (12.62%). Treatment with МЕ increases yield between 3.06% аnd 8.6%. Especially clear is the trend of increasing protein content in the range of 2.27% to 18.62% оп the tested hybrids. Best results for increasing the protein content are obtained after treatment with Nir (29.52%). The hybrid Kn 509 responds best when treatment is done with B-52 (11.64% above the control) and shows the least increase in lipids content on 625 Kn M625 (5.8% — B-52).