• Publications
  • Influence
Factors affecting the utilization of 'poor-quality' forages by ruminants particularly under tropical conditions.
  • R. Leng
  • Biology, Medicine
  • Nutrition research reviews
  • 1990
I N T R O D U C T I O N . . 278 C H A R A C T E R I Z A T I O N OF LOW-QUALITY F O R A G E S . . . 278 C H E M I C A L C O M P O S I T I O N O F LOW-QUALITY F O R A G E S . . 279 BASIC C O N C E P TExpand
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Nitrate and sulfate: Effective alternative hydrogen sinks for mitigation of ruminal methane production in sheep.
Twenty male crossbred Texel lambs were used in a 2 × 2 factorial design experiment to assess the effect of dietary addition of nitrate (2.6% of dry matter) and sulfate (2.6% of dry matter) on entericExpand
  • 207
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Rates of production of methane in the rumen and large intestine of sheep.
1. An isotope tracer method for estimating methane production in sheep is described. 2. The technique was used to estimate methane produced in both the upper and lower digestive tract and toExpand
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Duckweed - a potential high-protein feed resource for domestic animals and fish
Summary Duckweeds have received research attention because of their great potential to remove mineral contaminants from waste waters emanating from sewage works, intensive animal industries or fromExpand
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Nitrogen metabolism in the rumen.
Nitrogen metabolism is reviewed with emphasis on methods for quantitating various nitrogen-transactions in the rumen of animals on a variety of diets. Ammonia kinetics, microbial cell synthesis, theExpand
  • 293
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Dynamic aspects of ammonia and urea metabolism in sheep.
I. To obtain a quantitative model for nitrogen pathways in sheep, a study of ammonia and urea metabolism was made by using isotope dilution techniques with ['SN]ammonium sulphate and [Wlurea andExpand
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The effect of incremental levels of dietary nitrate on methane emissions in Holstein steers and performance in Nelore bulls.
Two experiments were conducted to study effects of dietary nitrate on enteric methane production, blood methemoglobin concentration, and growth rate in cattle. In Exp. 1, 36 Holstein steers (288 ± 25Expand
  • 57
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Simultaneous measurements of the rates of production of acetic, propionic and butyric acids in the rumen of sheep on different diets and the correlation between production rates and concentrations of
  • R. Leng, D. Brett
  • Chemistry, Medicine
  • The British journal of nutrition
  • 1 September 1966
1. A technique using a constant infusion of [ U- 14 C]acetate, [U- 14 C]propionate and [2–3-T]– hutyrate has been developed to measure simultaneously the production rates of acetic, propionic andExpand
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