AUTUMNAL FORAGE YIELD AND NUTRITIVE VALUE OF THE LEGUME ARACHIS
DOI:
https://doi.org/10.5216/cab.v8i3.1676Keywords:
Forragem, valor nutritivoAbstract
Dry matter yield and nutritive value of forage le-gume Arachis pintoi (Krap. & Greg.) cv. Alqueire-1 (BRA 037036), was evaluated under different cutting mana-gement regimes and levels of P and K fertilization, in a yellow-red argisoil, at CAP-UFPEL, Capão do Leão, RS, Brazil during Spring-Summer and Fall. Cutting regimes compared were: no cutting, one, two, three, four and five cuttings, at 5 cm above ground. Fertilization levels con-sisted in supplying zero, 50 and 100% of requirements for P and K recommended by Brazilian Soil Science Society, for warm season perennial forage legumes. Fertilization treatments were alocated to main plots and cutting regi-mes to subplots, in a complete splitplot randomized block design, with three replications. Data of the following va-riables were submitted to analysis of variance and polino-mial regression: dry matter yield and quality of autumnal cutting, dry matter accumulation rate of autumnal cutting and total dry matter yield. If the purpose is the utilization of the forage during Autumn, 70% of the recommended phosphorus and potassium fertilization is sufficient to ob-tain maximum forage yield. However, if the objective are cuttings during the growing season (Spring-Summer) and also in Autumn, it is necessary 100% of the recommended fertilization. The increase in number of cuttings during Spring-Summer decreases in the same proportion the fo-rage yield in Autumn. Forage nutritive value in Autumn is better when greater number of cuttings are made during Spring-Summer. Spring deferments also result in higher autumnal forage quality.
KEY-WORDS: Cutting, fertilization, tropical forage.
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