Some effects of shading and of nitrogen fertiliser on the chemical composition of freeze-dried and oven-dried herbage, and on the nutritive value of oven-dried herbage fed to sheep

Abstract

1968) Some effects of shading and of nitrogen fertiliser on the chemical composition of freezedried and oven-dried herbage, and on the nutritive value of oven-dried herbage fed to sheep, ABSTRACT An experiment is described in which the nutritive value and chemical composition of oven-dried herbage from shaded perennial ryegrass pasture (SR) were compared with those of unshaded ryegrass (R), shaded + nitrogen-fertilised (SR + N), and unshaded + nitrogenfertilised (R + N) ryegrass herbage, and with those of white clover (C).Higher f"od intakes and live weight gains were found with C herbage than with the ryegrass herbage (SR, R, SR + N, R + N = P), and with un shaded than with shaded herbage. Application of nitrogen fertiliser prior to harvesting did not affect live weight or food intake.A higher D.M. digestibility was found for C than for P herbage, and. in the second trial "nly, a higher digestibility was evident for unshaded than for shaded, and for nitrogen than for no nitrogen treatments.A higher proportion of soluble carbohydrate and lignin, but lower hemicellulose and cellulose content, were found in dried C than in P herbage. Shading perennial ryegrass pastures reduced the proportion of soluble carbohydrate and increased the proportion of cellulose and lignin. Nitrogen fertiliser reduced the proportion of cellulose and lignin in dried herbage. Freeze-dried herbage had a higher soluble carbohydrate, but lower insoluble carbohydrate, content than ovendried herbage.

Effects of Nitrogen Fertilizer and Planting Density on the Lignin Synthesis in the Culm in Relation to Lodging Resistance of Buckwheat

“…of lignin content and its related enzymes activities (Hight et al, 1968;Marchiori et al, 2014). In the present study, the lodging percentage and lodging index increased with the increase of nitrogen fertilizer and planting density.…”

Dry matter production, morphology and nutritive value of Dactylis glomerata growing under different light regimes

“…10). Many results have shown that in vitro digestibility of grasses is reduced under low light intensity and this is associated with reduced digestibility of cell wall constituents (Hight et al 1968). However, other studies have obtained less conclusive results with both increases and decreases in digestibility of herbage grown in a shaded environment (Wilson 1988).…”

“…Shading usually reduces the total non-structural carbohydrate of grasses, but has variable (positive and negative) effects on cell wall content and composition, lignin and in vitro digestibility of plant dry matter (Wilson 1988). According to Hight et al (1968), soluble carbohydrate content decreased by 3.7% units and dried forage digestibility by 0.6-3.6% units during a short shading period of time (2-3 days at 22% light transmission). However, Norton et al (1991) found a small nonsignificant decrease in soluble carbohydrate and a decrease in in vitro dry matter digestibility.…”

Growth and N Fixation of Some Tropical Forage Legumes as Influenced by Solar Radiation Regimes1

“…There were, however, differences among legumes (Table 1), with the highest DM percentages occurring in Hawaiian Giant and kaimi clover and the lowest in Siratro (as low as 16.2% DM at 45 and 27% full sun). Low DM concentrations per se are not likely to cause problems, however they are associated with low carbohydrate concentrations in grasses (Hight et al, 1968).…”