Thirty-six indigenous goats were used to determine the potential of sun-dried leaves of the shrub legumes Acacia angustissima, Calliandra calothyrsus and Leucaena leucocephala as supplements to native pasture hay (NPH). The dried leaves were included at the rates of 80, 160 and 320 g/head/day. Cottonseed meal fed at the same levels, and NPH fed alone were included as controls. Among the browses, C. calothyrsus had the lowest N content of 19.0 g/kg dry matter (DM) and A. angustissima the highest of 35.0 g/kg DM. The leaves from the legumes had significantly less N and higher cell wall, neutral detergent insoluble N (NDIN) and acid detergent insoluble N (ADIN) contents than cottonseed meal. The values of NDIN as a fraction of total N were 19, 456, 526 and 816 g/kg for cottonseed meal, L. leucocephala, A. angustissima and C. calothyrsus, respectively.Proanthocyanidin contents were 33, 196 and 134 g/kg DM for A. angustissima, C. calothyrsus and L. leucocephala, respectively. Type of supplement did not affect (P>0.05) NPH, total and digestible DM intakes although NPH intake was depressed (P<0.05) at the highest level of supplementation compared to the first two levels. Animals fed legumes excreted significantly more (P<0.001) faecal N (g/kg N intake) than animals consuming cottonseed meal. The reverse was observed for urine N. Among the legumes, C. calothyrsus had significantly higher (P<0.001) N in faeces (958 g/kg N intake) than A. angustissima (630) and L. leucocephala (615). Significant (P<0.05) correlation coefficients were obtained between proanthocyanidins (PAs) intake and faecal N, NDIN and ADIN (0.535, 0.501 and 0.786, respectively). Regressing digestible N on N intake indicated that A. angustissima and C. calothyrsus tannins had significant effects on the digestion of dietary N. The animal responses were discussed in relation to PAs content. It was concluded that both the type and level of PAs were important determinants of the animal responses.
Tag: nutrient intake
Optimizing amla (Phyllanthus emblica) fruit powder supplementation in liquid feed fed to Holstein dairy calves: Insights from growth performance and health events
Despite efforts at improvement, calf diarrhea remains one of the main problems in calf rearing. Amla (Phyllanthus emblica) fruit could be a good candidate to improve gut health due to its antimicrobial, gastro-protective, and immunomodulatory effects. This study aimed to evaluate the effect of amla fruit powder supplementation on frequency of diarrhea and growth performance of dairy calves. One hundred male Holstein calves [2-days (d)-old; 42.6 ± 1.7 kg body weight (BW)] were randomly assigned into five treatments, CON, PEF5, PEF10, PEF20, and PEF40, with 0, 5, 10, 20, and 40 g/d amla fruit powder (PEF) supplementation, respectively, and housed in individual hutches (n = 20 calves per treatment). The experiment lasted from 2 to 75 d of age (weaning) and calves were fed milk (2–7 d), milk replacer (8–75 d), and calf starter (2–75 d). The PEF supplementations were fed in two meals a day, equal amount each time, by mixing into milk or milk replacer. Feed intake and fecal score data were collected daily; BW and body frame measurements at 2, 14, 28, 42, and 75 d; and rumen fluid samples at 14, 28, 42, and 75 d. Starter and total dry matter intakes (DMI) differed among treatments during 22–75 with the highest in CON and linearly decreased with increasing PEF doses. Liquid feed DMI tended to decrease with increasing PEF doses. PEF supplementation had quadratic effect on body weight (BW), average daily gain (ADG), feed efficiency, body length, heart girth, and withers height. The BW and ADG differed among treatments during 29–75 and 15–75 d, respectively, with the highest in PEF5 followed by CON and lowest in PEF40. However, PEF did not improve BW and ADG compared to the CON. The overall feed efficiency in PEF5 was higher than in PEF20 and PEF40. PEF5 decreased the frequency of fecal score “3” (P = 0.02) while PEF5 (P < 0.01) and PEF10 (P = 0.03) increased the frequency of fecal score “1”, compared to the CON. Frequency of diarrhea in the PEF5 group (7.9%) was lower (P < 0.05) than all groups (11.1%, 14.3%, 22.6%, and 24.2% for PEF10, PEF20, and PEF40, respectively). Rumen fermentation (pH, ammonia-N, and volatile fatty acids) was not affected by PEF supplementation. However, ammonia-N showed a decreasing trend with increasing PEF levels. The results suggested that PEF could be fed at 5 g/d to reduce diarrhea in preweaning dairy calves.
Potential impacts of swidden rice transitions on nutrient intake in Kapuas Hulu, West Kalimantan, Indonesia
Traditional swidden rice cultivation in Kapuas Hulu consists of long-fallow cycles practiced on forested slopes. As oil palm development accelerates swidden transitions, these traditional practices are increasingly replaced by modified swidden systems which incorporate shorter fallows, and less forest regeneration.
This report documents changes in rice cultivation practices and the types and varieties of rice cultivated among smallholder farmers. Using a mix of primary and secondary data, this report highlights the great diversity of local varieties of rice still cultivated — many of which are indigenous to the region. However, as oil palm adopting households alter their cultivation practices, locally produced rice appears to comprise a smaller proportion of rice consumption and a smaller share of rice available in the market food system.
The nutritional consequences of these transitions are as yet unknown. Existing Food Composition Tables (FCT) for rice consist of only a few varieties and comparisons between locally produced and market origin rice are not available. However, many indigenous rice varieties have been shown to be nutritionally superior to higher-yielding alternatives commonly found in market systems. Given the significant quantities of rice being consumed, even small differences in nutrient content may have effects on nutrient intake and nutritional adequacy.
This report recommends investigation of the nutritional effects of changes in swidden rice transitions. An urgent priority is the nutritional analysis of indigenous rice varieties to be included in local and national FCTs. Such improved tables can then be used to model nutritional effects at the population level of changes in swidden rice cultivation and local food systems, and provide agricultural and health program planners with actionable recommendations to improve the health and nutrition of local populations.