The Effects of Dietary Crude Protein Level on Ammonia Emissions from Slurry from Lactating Holstein-Friesian Cows as Measured in Open-Circuit Respiration Chambers.

The effect of dietary crude protein (CP) level on ammonia (NH) emissions from slurry from lactating Holstein-Friesian cows was studied. Twenty-four-hour total collections of faeces and urine were made from 24 lactating Holstein-Friesian cows fed four total mixed rations containing 141, 151, 177, and 201 g CP/kg DM (6 cows/diet). The collected urine and faeces from each cow were combined to form 2 kg duplicate slurry samples (weight/weight; fresh basis) according to the proportions in which they were excreted.

Effect of Varying Dietary Crude Protein Level on Feed Intake, Nutrient Digestibility, Milk Production, and Nitrogen Use Efficiency by Lactating Holstein-Friesian Cows.

The effect of dietary crude protein (CP) level on intake, digestibility, milk production, and nitrogen (N) use efficiency was studied. Twenty-four Holstein-Friesian cows (17 multiparous and seven primiparous) were grouped by parity, days in milk, milk yield, and live weight into six blocks of four, and randomly assigned to four total mixed ration (TMR) treatments, containing 141, 151, 177, or 210 g CP/kg dry matter (DM), over 28 day experimental periods. Apparent total-tract DM and fiber digestibilities and milk fat composition were similar across treatments.

Milk yield response of cows supplemented with sorghum stover and Tithonia diversifolia leaf hay diets during the dry season in northern Uganda.

Five primiparous cows (Friesians crossed with undefined breeds and in early lactation) were used to assess the milk yield response of dairy cows offered a basal feed of Panicum maximum hay and supplemented with diets based on sorghum stover and Tithonia diversifolia leaf hay during the dry season. The cows were assigned to five experimental diets in a 5 × 5 Latin square design of 21-day experimental periods. The experimental diets consisted of a control (Panicum hay alone), and four experimental diets whereby Panicum hay was supplemented with diets based on sorghum stover, Tithonia leaf hay, maize bran, sunflower cake, and sugar cane molasses as follows: stover/Tithonia/bran/molasses (STBM), stover/Tithonia/bran (STB), stover/Tithonia/bran/cake (STBC), and stover/bran/cake (SBC).

Indigenous knowledge on the nutritional quality of urban and peri-urban livestock feed resources in Kampala, Uganda.

This study identified the indigenous criteria used by livestock farmers in urban and peri-urban areas of Kampala to assess the nutritional quality of available feed resources. Focus group discussions and questionnaire interviews (with a total of 120 livestock farming households) were conducted. The findings showed that banana peels, leftover food and own-mixed feeds were the most commonly used feed resources for cattle, pigs and chickens, respectively.