Mestscheiding melkveehouderij is maatwerk

Bij aangescherpte gebruiksnormen biedt mestscheiding mogelijkheden om de mestafvoer te beperken. Maar de bedrijfsomstandigheden bepalen de voor- en nadelen. Dit concluderen de deelnemers aan een workshop over mestscheiding

Inspelen op milieubeleid : cursusmateriaal voor tactisch en strategisch mineralenmanagement op melkveebedrijven 2010 t/m 2013/2015

Cursusmateriaal voor tactisch en strategisch mestbeleid in de melkveehouderij. In blokken kan men zich het mestbeleid eigen maken en dit vertalen naar de eigen praktijk. Het gaat om de blokken: mest- en mineralenbeleid, diagnose voor de melkveehouderij, managementmaatregelen, ruimte voor verbeterin

Some environmental aspects of grassland cultivation; the effects of ploughing depth, grassland age, and nitrogen demand of subsequent crops

The Netherlands has submitted a derogation under the Nitrate Directives to the European Union (EU) in 2000. In the final opinion by a group of experts about the Dutch derogation, recommendations on ploughing of grasslands were included dealing with i) the depth of ploughing of permanent grassland, ii) the age of temporary grassland and iii) the nitrogen demand of the subsequent crop of temporary grassland. A literature study was carried out in order to provide scientific information on these three issues. No studies were found in literature in which the effects of cultivation depth on nitrogen mineralisation and losses in reseeded grassland were assessed. The results of transformation of grassland into arable land show no clear effects of ploughing depth on N mineralisation. Differences in nitrogen mineralisation after 5 and 3 years temporary grassland are small. Italian and perennial ryegrass, potato, silage maize, winter wheat, and several vegetables have a high nitrogen demand (i.e. >250 kg N ha-1)

Veehouder, water en waterschap

Als grootgrondgebruiker heeft de melkveehouderij veel invloed op de regionale waterhouding. Om het watermanagement te optimaliseren wordt de BedrijfsWaterWijzer ontwikkeld, een tool waarmee een bedrijfswaterplan kan worden gemaakt dat aansluit bij de behoeften van de veehouder en zijn waterscha

Is het ammoniakprobleem opgelost als alle veehouders handelen als Koeien & Kansen?

Voor 2010 moet de Nederlandse melkveehouderij ten minste 15% minder ammoniak uitstoten. Op verzoek van het Milieu- en Natuurplanbureau (MNP) is verkend hoe groot het ammoniakverlies is als alle veehouders de aanpak van Koeien & Kansen volgen. Een verslag daarvan verschijnt binnenkort, maar het meest opmerkelijke willen we u niet zolang onthouden

P-equilibrium fertilization in an intensive dairy farming system: effects on soil-P status, crop yield and P leaching

In the coming decade, European dairy farms are obliged to realize a balance between phosphor (P) inputs to their farmland (in inorganic fertilizers and manure) and outputs (in crop products), the so-called P-equilibrium fertilization. The objective of the present study is to analyze the long-term effects of P-equilibrium fertilization on soil-P status (total soil-P and available soil-P), crop yield and P leaching on dry sandy soil, using data from experimental dairy farm ‘De Marke’, where P-equilibrium fertilization has been applied since 1989. For grassland, P availability is expressed in P-Al and for arable land in Pw. Total and available P status were monitored in the upper topsoil (layer 0–0.2 m). Total soil-P was also monitored in the lower topsoil (layer 0.2–0.4 m) and in the subsoil (0.4–0.6 m). From 1989 to 2006, Pw and P-Al (means of all farmland) decreased by 26 and 25%, respectively. In the same period, mean total-P content of the farmland decreased by 16%. There was a large variation in initial P status (1989) of the various plots. The rate of decline in all soil-P indicators was positively correlated to their initial values. In plots with the lowest initial values, P status did not change, while in plots with high initial values it tended to stabilize at lower levels. At equilibrium-P fertilization, Pw is estimated to stabilize at 20. This is lower than the recommended P status of Dutch soils used for maize cropping. P-Al is estimated to stabilize at 30–40, which corresponds to the current recommendations for grassland. The data show that at P-equilibrium fertilization, soil available-P status is higher in a maize-ley rotation than in permanent grassland. The decline in total P and available P did not affect crop yield, nor did it affect the P concentration in groundwater, but at ‘De Marke’, P emission to groundwater is generally low. The results obtained suggest that P-equilibrium fertilization can be compatible with efficient crop productio