Piglets from about 6 weeks old were fed on basal diets with P 0, 0.6, 1.2 or 1.8 g/kg, 0, 1.2 or 2.2 g/kg, and 0 or 2.0 g/kg in experiments 1, 2 and 3, respectively. Blood factors did not show a significant response to P intake. Plasma alkaline phosphatase activity was not linearly related to P intake, while regressing the inorganic P content to the quantity of supplemented P resulted in a low fitness of the model (Rsuperscript 2 = 53%). Results from bone fat-free DM, concentration of ash in fat-free DM, amount of ash, concentration of P in ash and bone breaking strength were better (Rsuperscript 2 = 45 to 94%). There were slight differences in the results using tibia, femur or third and fourth metatarsals. However, the highest degree of fit was found using the apparent digestibility of P as the dependent variable (Rsuperscript 2 = 96 to 100%). After relating the criteria to the retention of P, again the apparent P digestibility was the most accurate factor to determine the biological availability of P. Basing the nutritional value of feed phosphates on digestibility of P, significant differences were shown between form and origin of feed phosphate. The values within a type of feed phosphate showed a high repeatability. (Abstract retrieved from CAB Abstracts by CABI’s permission)
de monitor integraal duurzame stallen uit. De monitor laat zien dat op 1 januari 2018 in Nederland 15,0 % van alle rundvee-, varkens-en pluimveestallen integraal duurzaam is.
SummarySince 2008 commissioned by the Ministry of agriculture, nature and food quality (LNV) WUR conducts the monitor integral sustainable stables. The monitor shows that on 1 January 2018 in the Netherlands 15.0% of all cattle, pig and poultry houses are integral sustainable.Dit rapport is gratis te downloaden op https://doi.org/10.18174/453521 of op www.wur.nl/livestock-research (onder Wageningen Livestock Research publicaties).
De overheid ambieert een integraal duurzame veehouderij in 2023. Daarom wordt jaarlijks een nieuw doel gesteld. Voor eind 2016 (peildatum 1 januari 2017) noemt het ministerie als ambitie dat minimaal 14% van de rundvee-, varkens-en pluimveestallen integraal duurzaam is. Deze studie laat zien dat op 1 januari 2017 in Nederland 13,6 % van alle stallen integraal duurzaam is. Summary The Government aspires to an integral sustainable farming in 2023. There are yearly increasing goals. The ambitions of the Government is that at January 1, 2017 a minimum of 14% of the cattle, pig and poultry houses are integrally sustainable. The number of integrally sustainable houses is monitored annually. The percentage of houses that are integrally sustainable at January 1, 2016 is on average 13.6%.
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