EFFECT OF DIFFERENT FERTILIZER TREATMENTS ON BOTANICAL COMPOSITION, HERBAGE YIELD AND HERBAGE QUALITY IN THE EASTERN ANATOLIA REGION PASTURE OF TURKEY
Abstract
This study was carried out to reveal the effect of different doses of
nitrogen, phosphorus and combinations of these doses on the botanical
composition, herbage yield and herbage quality in the Eastern Anatolia
Region pasture of Turkey. In the study 0, 5, 10, 15 kg da(-1) nitrogen,
0, 4, 8, 12 kg da(-1) phosphorus doses and different combinations of
these fertilizers (5-4, 5-8, 5-12, 10-4, 10-8, 10-12, 15-4, 15-8, 15-12
kg da(-1)) were used and the study was conducted over a natural pasture
section of Research and Application Center of Bingol University.
Experiments were conducted between the years 2014-2017 for 4 years in
randomized blocks factorial experimental design with 3 replications and
2 factors. Weight-based botanical composition, green herbage yield, dry
herbage yield, crude protein yield, acid detergent fiber (ADF), neutral
detergent fiber (NDF) and relative feed values (RFV) were investigated.
Present findings revealed that fertilizer treatments (nitrogen and
phosphorus doses and combinations) increased legume ratio in botanical
composition, green herbage yields, dry herbage yields, crude protein
yields and relative feed values and reduced ADF and NDF ratios
systematically during the first three years of the experiments. The
greatest green herbage yield (758.9 kg da(-1)), dry herbage yield (458.6
kg da(-1)) and crude protein yield (63.7 kg da(-1)) were obtained from
10 kg da(-1) nitrogen and 8 kg da(-1) phosphorus treatments. As compared
to the control plot, the plot with 10-8 kg da(-1) N-P treatment had
about 115.7\% greater green herbage yield and 154.4\% greater dry
herbage yield. Therefore, 10 kg da(-1) nitrogen and 8 kg da(-1)
phosphorus treatments could be recommended for fertilization programs to
be applied in pastures of Bingol province and the Eastern Anatolia
pastures with the similar ecological conditions.
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