Some nutrient contents of ramie (Boehmeria nívea CV Myasaki) in four cutting frequencies every one fertilized with mineral or organic nitrogen

Abstract

This work was conducted in the Development Research Unit, Itapetininga- SP, Brazil, in a red darkness latosol Rami (Boehmeria nivea CV Myasaki) was evaluated under two nitrogen sources (mineral: ammonium sulphate; organic: chicken manure) and four cutting frequencies (28, 35, 42 and 49 days). Nitrogen application of each N source, in the basis of 100 kg/ha/year of N, was made after each cut. From May 2006 to May 2007, after the uniformity cut 13, 10, 8 and 7 cuts were made with 28, 35, 42 and 49 days interval, respectively. Crude protein (CP), crude fiber (CF), “in vitro” digestibility (IVDMD), calcium (Ca) and phosphorus (P) contents were evaluated. The contents varied from 12,3% to 28,3% in CP; 39,5% to 79,9% in DMIVD; 2,0% to 5,2% in Ca and 0,26% to 0,51% in P. There weren’t significant differences between nitrogen sources in the studied variables. Crude protein content decreased linearly way with increase of cutting interval. There were not significant differences among cutting frequencies in crude fiber, dry matter “in vitro” digestibility, calcium and phosphorus contents. The contents of studied nutrients were plenty significative, reaching values yet larger than quoted by a good quality tree legumes cut also to feed small ruminants. The Ca contents were high and heed must be taken in Ca: P relation in order to balanced rations formulation.