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Finding Added Value from Cassava Byproduct to Fattening Cattle
Case study in Lao PDR
Phanthavong Vongsamphanh, Viengsakoun Napasirth1, Sangkhom Inthapanya2 Khamla Sengdavong3 and T R Preston4
Department of Livestock and Fisheries, Ministry of Agriculture and Forestry
PO Box 6644 Vientiane, Lao PDR
vongsamphanh2015@
1Faculty of Agriculture, National University of Laos, Nabong Campus, P.O.Box 7322, Vientiane, Lao PDR
2Souphanouvong University, Luang Prabang, Lao PDR.
3Soukanya Farm, 19 km, Nongboua Village, Xaythany District , Vientiane Capital
4 Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria (CIPAV),
Carrera 25 No 6-62 Cali, Colombia
Abstract
This study was carried out in in the Lao-Indochina Cassava Factory in Vientiane Capital in which cassava pulp, the byproduct from cassava root starch extraction, had been stored over a 4 year period (2011-14). Samples were taken from an uncovered pit (250*50m area; 7 m deep) by inserting the PVC tube to reach the bottom of the pit for sample taking in the pipe and separating the samples from the core taken from the PVC tube and pH and chemical analysis was done in Laboratory. A sample taken at 2.5m depth was incubated with urea, cassava leaf meal and rumen fluid in an in vitro rumen fermentation and compared with fresh cassava root as a control (experiment 1). With these resources it was hypothesized that cattle could be fattened intensively to produce quality beef for export, and eight local "Yellow" cattle (range 78 to 108 kg) were allocated according to live weight to two groups each of four animals. They were fed a basal diet of ad libitum ensiled cassava pulp enriched with urea at the rate of 3% of the cassava pulp dry matter (DM). The experiment was done in the dry season (April-August 2015). Fresh Brewer’s grains were used as a source of "bypass" protein. Rice straw was given as a source of “roughage”. A sulphur-rich mineral mixture was provided ad libitum. The urea was dissolved in water and sprayed on the cassava pulp. Brewers’ grains and rice straw were offered separately (experiment 2)
The result were showed that the upper 50 cm had rotted due to exposure to air and rain, but samples from 0.5 to 7m revealed that these were satisfactorily ensiled with pH values in the range 3.2 to 3.5. Gas production amd DM mineralization values after 24h incubation of the sample taken at 2.5m depth indicated that the pulp was only slightly inferior ( ................
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