Ecoregion and farm size differences in dairy feed and manure nitrogen management: A survey
نویسندگان
چکیده
منابع مشابه
MANURE MANAGEMENT Differential Nitrogen-15 Labeling of Dairy Manure Components for Nitrogen Cycling Studies
proach, 12 to 63% of dairy manure N may be taken up by corn during the first growing season after application Current estimates of dairy manure nitrogen availability to crops (Motavalli et al., 1989; Klausner et al., 1994). Nutrient are based on indirect measures and vary greatly. The objective of this study was to differentially label dairy manure N components with the availability in the seco...
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"Compost" dairy barns are relatively new, and this manure, which we refer to as stratified bedded pack (SBP) dairy manure, has neither been characterized in detail nor defined in terms of its N supply. We measured physical characteristics, nutrient concentration, N mineralization, and N supply to corn (Zea mays L.) of SBP dairy manure from eight Minnesota farms. Concentrations of N, P, and K we...
متن کاملManure Management regarding Nitrogen Compounds
This chapter considers the emissions of ammonia (NH 3) and nitrous oxide (N 2 O) from the excreta of agricultural animals deposited in buildings and collected as either liquid slurry or solid manure. This includes emissions from animal excreta at all stages: animal housing, manure storage and from land spreading of manures. Excreta deposited in fields by grazing animals are dealt with under SNA...
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Phosphorus (P) is an essential mineral that needs to be supplied in sufficient quantities for maintenance and growth and milk production in dairy cattle. However, over 60% of the P consumed can be excreted in faeces with a potential to cause environmental pollution. Concern over higher levels of P in intensively managed livestock systems has led to legislation such as the Water Framework Direct...
متن کاملA beef herd model for simulating feed intake, animal performance, and manure excretion in farm systems.
A beef herd submodel was created for integration with other farm components to form a whole-farm model capable of simulating a wide range of beef production systems. This herd submodel determined the best available feed or feed mix to meet the fiber, energy, and protein requirements for each of up to six animal groups on the farm. The groups comprised any combination of cows, nursing calves, yo...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 2011
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas2010-004