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The assessment of the nutritional value of plants rich in condensed tannins (CT) stems from the models predicting the normal nutritional value. In order to verify the effects, this study compares the nutritional value of chicory (cychorium intybus), sainfoin (onobrychis viciifolia) and lotus (lotus corniculatus) obtained with data determined using animals (in vivo, in sacco) or with prediction equations with regard to levels of CT. The organic matter digestibility (OMD) in vivo of chicory (78.8 %) was higher (p < 0.01) than the similar OMD of the two other plants (69.3 %). Sainfoin with the highest concentration of CT obtains the lowest content in digestible nitrogenous matter (DNM) with 58.7 % (vs. chicory with 69.7 and lotus with 76.5 % p<0.01). The degradability of the nitrogenous matter of plants with low CT values is comparable for chicory and lotus (64.2 % and 65.1 %) but is different to that of sainfoin 47.8 % (p < 0.01).The best forecasts for forage studied were obtained for chicory (1st cycle stage leaves without stalks) with OMD equations for a mixture with a high degree of other plants with thin leaves, for lotus (3rd cycle start of flowering) with that for legumes and for sainfoin (1st cycle start of flowering) with that for an unspecified mixture. Source

Wyss U.,Forschungsanstalt Agroscope Liebefeld Posieux ALP Haras
Agrarforschung Schweiz | Year: 2012

In Switzerland, some farms are using chemical preservatives in order to preserve moist hay. Detailed knowledge of the DM-content as well as the correct dosage are important for the success. In a trial, the efficacy of the preservative Selko Heu was investigated with hay of two different dry matter contents and three different dosages. As negative control, variants without additives were tested. These negative controls were additionally tested with different forage densities. During a period of 30 days, temperature was continuously controlled. Before and after this period, the dry matter contents and different parameters were analysed. In both DM levels, the untreated hay heated strongly and at the end it was totally moldy. The different densities showed that the stronger the hay was pressed, the higher the heating and the spoilage was. In contrast to the negative control, with the addition of the preservative Selko Heu, the heating up and the deterioration of the hay spoilage could be partly or totally reduced. The correct dosage is important for the success. Source

Pittet G.,Suisselab AG | Luginbuhl W.,ChemStat | Berger T.,Forschungsanstalt Agroscope Liebefeld Posieux ALP Haras
Agrarforschung Schweiz | Year: 2012

Every month, only one official milk-testing result is available from between 1000 and 1200 milk producers instead of the two required. Of the missing results, one part originates from milk-collection centers where milk delivery takes place every other day and sampling is performed manually, and is therefore attributable to the time delay between sampling notification and milk delivery. Extending the maximum time allowed between sampling and commencement of the analysis from 30 to 36 hours would provide an easy and cost-effective method to solve this problem. The increase in the number of samples with results above the maximum permitted limit would be slight: In the present study, the percentage increased from 1,397 % at 30 hours to 1,468 - 2,648 % at 36 hours, representing a rise of 0,07 - 1,25 %. This can be accepted as a justifiable drawback as it would affect very few producers and only those whose milk at 30 hours contains bacterial counts close to the official limit. The overall discrimination would probably be even lower as the increased time span would not necessarily affect both monthly samples and therefore, after calculation of the monthly geometric mean as required by the public-law milk quality control, the results may well remain within the limits set. Source

Schlegel P.,Forschungsanstalt Agroscope Liebefeld Posieux ALP Haras | Menzi H.,Hochschule fur Agrar
Agrarforschung Schweiz | Year: 2013

Breeding and excretions of nitrogen, phosphorus and potassium The aim of this study was to evaluate, by means of a survey, the forage intake and nitrogen (N), phosphorus (P) and potassium (K) excretions in breeding and fattening rabbit farms. The does produced an average of 6,4 litters a year and kittens were weaned between 24 and 35 days. In the fattening units, 5,2 stock rotations were accomplished a year and a final weight of 2,9 kg was reached with an average gain of 42 g/d and a feed conversion ratio 4,17. Based on fresh matter, the N, P and K contents of rabbits were respectively 30,4, 6,5 and 3,1 g/kg. The dietary contents ranged between 21,4 and 23,8 g N, 5,0 and 6,0 g P and between 13,5 and 14,9 g K depending on the animal category. Forage intake represented 20, 15 and 9% of total intake by does, young breeding stock and fattening rabbits respectively. The annual excretion of N and P was lower than the currently used standards in rabbit breeding but higher in rabbit fattening. The annual K excretion was considerably higher than currently believed in cuniculture. Source

Meisser M.,Forschungsanstalt Agroscope Changins Wadenswil ACW | Deleglise C.,Forschungsanstalt Agroscope Changins Wadenswil ACW | Mosimann E.,Forschungsanstalt Agroscope Changins Wadenswil ACW | Signarbieux C.,Ecole Polytechnique Federale de Lausanne | And 4 more authors.
Agrarforschung Schweiz | Year: 2013

In order to determine the impacts of a severe summer drought on the agronomic value and diverse physiological and functional characteristics of a permanent meadow, a trial was carried out in 2012 on a mountain farm located in the Swiss Jura (1200 m). Two factors - management type (mowing vs grazing) and moisture (drought vs control) - were tested with a 2 × 2-design. The drought stress was simulated by means of rain shelters for a duration of 84 days. The grazed plots were grazed every four weeks with ewes, whereas the mowed plots were cut three times in the season. The biomass and the quality of the forage were monitored across the season. The botanical composition of the meadow and the functional traits of the 16 most abundant species were assessed before and after the drought treatment. The photosynthesis rate, the pre-dawn leaf water potential and the respiration of the soil were all measured. Apart from important yield losses, the drought stress also led to changes in the nutrient contents and the nutritive value of the forage. The ecophysiological measurements reflected a slowdown of the whole ecosystem. The grazed plots, characterized by a shorter vegetation, were more impacted by the drought than the mown plots. Source

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