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Studies on the digestibility of feeds in the ruminants and different methods for measuring it
2002
Kaldmaee, H. | Kirsel, R. | Kaert, O. | Vadi, M. (Estonian Agricultural Univ., Tartu (Estonia))
To study the organic matter digestibility of feeds 22 in vivo and in vitro digestion experiments were carried out by using DAISY II filter bags system in the Eerika Experimental Farm of the Estonian Agricultural University in 1997-2001. In the in vivo experiments 4 rams and special boxes were used. The in vitro experiments were carried out and the chemical composition of feeds was determined in the laboratory of the Department of Animal Nutrition in the Institute of Animal Science by methods generally recognized in the EU. The objective of the study was the comparison of organic matter digestibility of feeds measured by in vivo methods, by DAISY II filter bags method and of that calculated by acid detergent fibre or neutral detergent fibre.
显示更多 [+] 显示较少 [-]Effect of maturation on the quality of large rainbow trout reared in Estonia
2002
Ilves, P. | Paaver, T. (Estonian Agricultural Univ., Tartu (Estonia))
Dressing percentage and gonadosomatic index (GSI) of large (2-3 kg) rainbow trout (Oncorhynchus mykiss), produced in Estonian fish farms were estimated. The dressing percentage and GSI did not depend on fish size, but there was a strong negative correlation (r = - 081, p0.001) between themselves. During maturation the flesh color decreased significantly. The male trout had the palest color (13 color card units), the color of fillets of females decreased with maturation from 15 to 14. The immaturate females had the brightest color (17 color card units) and the highest slaughter yield (mean dressing percentage 87%, mean fillet yield 68%). Due to deterioration of quality (smaller slaughter yield and pale color) the maturation of trout causes profit loss for fish farmers and thus, rearing of late maturing all-female strains is recommended.
显示更多 [+] 显示较少 [-]Wage premiums for on-the-job computer use 全文
2002
Kusmin, Lorin D.
Managing intellectual property and proprietary technology in agricultural research
2002
Cohen, Joel I. | Falconi, Cesar | Henson-Appolonio, R.V. | Komen, John | Salazar, Silvia
Assessing the benefits of rural women`s participation in natural resource management: Proceedings of the Natural Resource Management (NRM) Small Grants End-of-project workshop, Cali, Colombia 13-17 November 2001 [on line]
2002
Sanginga, Pascal C. | Lilja, Nina | Gurung, Barun