The development of plant components and their effects on the composition of fresh and ensiled forage maize: 1. The accumulation of dry matter, chemical composition and nutritive value of fresh maize

摘要: Results from two trials, in which the effects of genotype, plant density and harvest date on accumulation dry matter chemical composition nutritive value components, are presented. Inra 200, LG11, Maris Saffron, Caldera 535, Anjou 210 White Horse Tooth were established at 5·0, 9·8 13·5 plants/m2 factorially designed experiments.In vitro digestible organic matter, water-soluble carbohydrates, starch, total nitrogen, acid-detergent fibre, cellulose, lignin, phosphorus, magnesium, potassium, calcium, sodium, zinc, manganese copper analysed for whole crop components.With exception Tooth, stem yields declined after reaching a peak 2–3 weeks mid-silk. This was attributed to movement carbohydrates ear, with greater being associated larger ear component. As result component crops containing small proportion ear. The higher digestibility compensated component, that varying proportions components did not markedly affect whole-crop prior ensiling.The deposition starch large caused significantly more rapid rise D.M. content than component.Acid-detergent fibre lignin values much lower those recorded U.S.A. Genotype had no effect mineral but phosphorus potassium concentrations dramatically frost.