Abstract

PENTON-FERNANDEZ, Gertrudis et al. Effect of cutting interval and nutrition management in mulberry Morus alba (L.). I. Forage production. Pastos y Forrajes [online]. 2016, vol.39, n.2, pp.111-118. ISSN 0864-0394.

A study was conducted in order to evaluate the cutting intervals (30, 60 and 90 days) and the nutrition management in mulberry: without mineral fertilizers or intercropped and AMF-inoculated Canavalia ensiformis (F0); mineral fertilization at a rate of 150 and 75 kg ha^-1 of N and K₂O per season (MF), respectively; and intercropped and AMF-inoculated C. ensiformis (CeAMF). The design was randomized blocks with factorial arrangement, and the soil is classified as lixiviated Ferralitic Red. In the rainy season, the highest yields were obtained with CeAMF and cutting every 90 days (between 10,99 and 6,85 kg DM ha^-1), and in the dry season this indicator was higher in MF (between 3,56 and 2,52 kg DM ha^-1). The edible biomass production per cutting at 90 days showed differences among treatments in favor of MF in the first cutting and of CeAMF in the second cutting. CeAMF with the 90-day interval reached a proportion of leaves higher than the population mean in the rainy season, unlike the dry season. The CP yield in the rainy season was higher in MF with the 60- and 90-day intervals, and in CeAMF in the 90-day interval. It is concluded that the cutting interval every 90 days was the best, and that it was feasible to intercrop AMF-inoculated C. ensiformis in the rainy season. The season determined the amount of forage and crude protein production, which was three times higher in the rainy season.

Keywords : Fertilizer application; Canavalia ensiformis (L.); inoculation; arbuscular mycorrhizae.

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