Forage production based on triticale (X. triticosecale Wittmack) in Lixic Ferralic Nitisol soil with varying nitrogen doses and arbuscular mycorrhizal fungal inoculation
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Abstract
"Niña Bonita" Pasture and Forage Station of Bauta, in order
to achieve high forage production based on triticale by using
minimum nitrogen doses. It was made on a Lixic Ferralic
Nitisol with arbuscular mycorrhizal fungal inoculations
(AMF). Treatments consisted of AMF inoculation and
non-inoculation as well as varying N doses (0, 50, 100,
150, 200, 250 and 300 kg ha-1), with a fixed bottom of 54
and 70 kg ha-1 of phosphorus and potassium, respectively.
Evaluations were performed to leaf rates (% N, % P and
% K), fungal variables, N, P and K extraction (kg ha-1),
raw protein (%), mycorrhizal efficiency (%), dry forage
mass (kg ha-1), apparent recovery efficiency (kg kg-1) and
partial factor productivity, besides using ANOVA statistical
analyses with one-way classification model to the original
data. In every case, the best fitting models (dose-yield) were
chosen to estimate optimal N doses with and without AMF,
followed by the first derivative criteria to find the respective
optimum ones. Results showed that AMF application allows
reducing N doses to 50 and 100 kg ha-1, achieving a dry
mass production of 6185 kg ha-1 with 11,75 % raw protein;
leaf rates of 1,94 % N, 0,23 % P and 30 % K, indicating the
adequate forage quality produced.
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