Untersuchungen zur Optimierung der Formaldehyddosis bei der Behandlung von Sojaextraktionsschrot

Voigt, sc. J.; Piatkowski, sc. B.; Schönhusen, U.; Krawielitzki, R.; Chrastinová, Ľubica

doi:10.1080/17450398509424718

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…When RSM was treated with formaldehyde in liquid form, 8 g of formaldehyde per kg CP were necessary to reduce ruminal CP degradation by 50% without negatively affecting digestibility of CP in the lower tract (Krawielitzki et al, 1982). A lower optimum level (5 g/kg CP) for protecting soyabean meal CP from ruminal degradation without hindering post-ruminal digestion has been reported by Voigt et al (1985), who applied formaldehyde in gaseous form at atmospheric pressure and room temperature.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of three rape seed commodities in the rumen of steers 1. Degradation of dry matter and crude protein and disappearance of amino acids <i>in situ</i>

Südekum¹,

Andree²

1997

J. Anim. Feed Sci.

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Ruminal degradation characteristics of rape seed and of untreated and formaldehyde-treated rapeseed meals containing less than 8 /¿mol of total glucosinolates per gram of dry matter were investigated. Feeds were incubated in polyester bags in the rumen of three fistulated steers for 0,2,4, 8, 16, 24 and 48 h. The rate and extent of degradation of dry matter and crude protein and disappearance of amino acids from polyester bags were determined. The crude protein was more degradable than the dry matter of rape seed and untreated rapeseed meal, whereas the opposite was observed for the formaldehyde-treated rapeseed meal. The treatment of the rapeseed meal with formaldehyde greatly reduced the rate and extent of dry matter and crude protein degradation compared with the untreated meal. Effective degradabilities of dry matter and crude protein declined in the following order: rape seed > untreated rapeseed meal > formaldehyde-treated rapeseed meal. The effective degradabilities of crude protein at assumed ruminal passage rates of 2, 5 and 8%/h ranged from 77 to 62% for the rape seed, 76 to 51% for the untreated meal and 39 to 16% for the formaldehyde-treated meal. With increasing exposure time to the rumen, the amino acid profile of undegraded residues of rape seed and of untreated rapeseed meal changed. As a result, large differences among amino acids were observed for percentages of disappearance from the bags. Treatment of rapeseed meal with formaldehyde was effective in preserving the amino acid composition of the undegraded feed protein.

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Section: Discussionmentioning

confidence: 99%

Evaluation of three rape seed commodities in the rumen of steers 1. Degradation of dry matter and crude protein and disappearance of amino acids <i>in situ</i>

Südekum¹,

Andree²

1997

J. Anim. Feed Sci.

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Determination of the dry matter disappearance and the crude protein degradability of the formaldehyde treated feeds in the rumen byin situmethod

Čerešňáková

Chrenková

Sommer

et al. 1989

Archiv für Tierernaehrung

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Sunflower cake (SC), horse bean (HB), and alfalfa meal (AM) were treated with rising doses of formaldehyde (F) from 0.0, 0.2 ... 2.0 g F per 100 g crude protein. We have followed the differences of crude protein solubility, its degradability and disappearance of dry matter in the rumen as well as the amount of reversible bonded F from the F dose. With AM it was found a significant influence of ADF on the degradability and on the amount of acid-labile bonded F and/or on the decrease of N solubility. From the total N content the share of soluble nitrogen decreased in SC by 31%, HB by 24%, and in AM only by 12.5%. With the increase of the F dose its protective effect on proteins against the degradability mainly in SC and HB also rose significantly. The degradability of AM protein was influenced more by the incubation time than by the effect of treatment. The degradability of the SC proteins fell from 95% with untreated to 27% treated with the maximum dose. With AM it fell slowly from 84% to 74% by the determination coefficient R2 = 0.77. It was observed a marked decrease in HB only from the dose of 1.28% F. The changes in dry matter disappearance were similar to the changes in crude protein degradability and to the changes of solubility in SC and AM. The in situ method proved very suitable for the determination of the extent of degradability of the feed proteins in the rumen.

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Ruminal degradability of crude protein from different treated soybean meals in lactating cows

Schröder

Brandt

Südekum

et al. 1989

Archiv für Tierernaehrung

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Ruminal crude protein (CP) degradability of four commercially available soybean meal (SBM) types--untoasted (U), toasted (T), heat-treated (H) and formaldehyde-treated (F)--was studied by the use of in sacco and in vivo techniques with lactating German Friesian cows cannulated in the rumen, duodenum and ileum. In two in sacco experiments three cows were fed a diet based either on grass hay plus ear-maize silage or on barley whole plant silage. Ruminal degradation rate of CP was estimated as percent nitrogen (N) disappearance from polyester bags incubated in the rumen for 2, 4, 6, 8, 12 and 24 h. Ruminal degradation rate of CP varied among the four SBM types as well as between the two basal diets. N disappearance from the bags after 12 h of incubation averaged 96, 67, 37, and 23% for the U, T, H, and F SBM types, respectively, in the cows fed the hay/ear-maize silage diet vs 99, 86, 58 and 41% for the four SBM types, respectively, in the cows fed the barley whole plant silage diet. In the in vivo experiment, four cows were fed diets based on meadow hay and ear-maize silage in a 4 x 4 Latin square design. The effect of SBM treatment on the flow rate of non-ammonia N (NAN) into the duodenum, and its relationship with the ruminal degradation rate of CP of the four SBM types, was studied. Formaldehyde treatment increased the amount of NAN entering the duodenum (P less than .05): 485 g cow-1 day-1 compared to 383, 418 and 428 g for U, T and H, respectively. Calculated ruminal CP degradabilities were 93, 75, 71 and 38% for SBM types U, T, H and F, respectively.

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Untersuchungen zur Optimierung der Formaldehyddosis bei der Behandlung von Sojaextraktionsschrot

Cited by 6 publications

References 22 publications

Evaluation of three rape seed commodities in the rumen of steers 1. Degradation of dry matter and crude protein and disappearance of amino acids <i>in situ</i>

Evaluation of three rape seed commodities in the rumen of steers 1. Degradation of dry matter and crude protein and disappearance of amino acids <i>in situ</i>

Determination of the dry matter disappearance and the crude protein degradability of the formaldehyde treated feeds in the rumen byin situmethod

Ruminal degradability of crude protein from different treated soybean meals in lactating cows

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