Fluxes of K, P, and Zn in a conventional and an organic dairy farming system through feed, animals, manure, and urine—a case study at Öjebyn, Sweden

Gustafson, Gunnela M.; Salomon, Eva; Jonsson, Sofi; Steineck, Staffan

doi:10.1016/s1161-0301(03)00077-7

Cited by 37 publications

(14 citation statements)

References 8 publications

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“…In the Öjebyn project in northern Sweden, nutrient cycling in organic dairy farming was compared with conventional management (Jonsson, 2002; Bengtsson et al. , 2003; Gustafson et al. , 2003).…”

Section: Potassium At the Grassland Farm Levelmentioning

confidence: 99%

“…Deficits are probably more likely on sandy soils when combined with high levels of N 2 fixation and yield (Baars, 2001;Stockdale and Watson, 2002). In the Ö jebyn project in northern Sweden, nutrient cycling in organic dairy farming was compared with conventional management (Jonsson, 2002;Bengtsson et al, 2003;Gustafson et al, 2003). There had been a crop rotation of 6 years including forage crops and grass-clover leys previously.…”

Section: Potassium At the Grassland Farm Levelmentioning

confidence: 99%

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Potassium cycling and losses in grassland systems: a review

Kayser

Isselstein

2005

Grass and Forage Science

157

107

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Cycling of potassium in grassland systems has received relatively little attention in research and practice in recent years. Balanced nutrient systems require consideration of nutrients other than nitrogen (N). Potassium (K) is needed in large amounts and is closely related to N nutrition. In intensive dairy farming, surpluses of K arise from the input of concentrates and fertilizer and are returned to the grassland and may lead to increasing K content in the soil. Organic farming, on the other hand, is characterized by limitations in input of nutrient sources and quantities. Leaching of K from grassland is usually low, but high levels of available soil K, high K input from fertilizer or at urine patches lead to increasing losses. High K inputs have a negative influence on Mg and Ca uptake by plants and can cause accelerated leaching of these cations. High levels of K have been associated with inducing nutrition-related dairy cow health problems such as milk fever (hypocalcaemia) and grass tetany (hypomagnesaemia). This review gives an overview of the cycling of potassium and related cations in grassland systems especially with regard to leaching losses and identifies limitations to knowledge.

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Section: Potassium At the Grassland Farm Levelmentioning

confidence: 99%

Section: Potassium At the Grassland Farm Levelmentioning

confidence: 99%

Potassium cycling and losses in grassland systems: a review

Kayser

Isselstein

2005

Grass and Forage Science

157

107

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“…Feed composition influences the chemical composition of the excreta. There is a risk of K loss by leaching from manures before it reaches the field and can be used by the crop, for example losses through leakage from silage, leaching losses from manure/urine handling or manure heaps during decomposition (Berry et al 2003;Gustafson et al 2003). A considerable proportion of the K in crops is bound in straw and other plant residues, which makes the disposal of these fractions important for the K balance.…”

Section: K Inputs To Cropping Systemsmentioning

confidence: 99%

Critical aspects of potassium management in agricultural systems

Öborn¹,

Andrist‐Rangel²,

Askegaard³

et al. 2005

soil use manage

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Fertilizer and manure application rate and timing are often based on the optimal nitrogen rate and not on potassium (K) requirements. This can lead to excess or shortage of K depending on the crop and rotation. In grass-dominated agricultural production, including many organic farming systems, K has become a critical element, especially in areas dominated by coarse-textured or organic soils. In this paper we review K management in relation to long-term sustainability of both the soil resource and the production of crops of high yield and quality. One question for the future is whether we can adopt management options that favour efficient use of K and secure a sustainable future for global K reserves. For example, is it possible to enhance the release rate of K from soil mineral sources so that we require less fertilizer K from K-bearing salt deposits? A reduction in external K inputs requires improved on-farm recycling of K in order to reduce losses. We also need a better understanding of soil processes and soil -plant interactions and decision-support tools to predict the potential K release from mineral weathering. Certain areas dominated by young, clay-rich soils can potentially supply enough K, whereas other areas with coarse sandy or organic soils have a very low weathering potential and would thus need external inputs of K.

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“…For example, Gustafson et al (2003) compare barn level flows and balances of Zn for a 50 cow Organic and Conventional farm. There were no differences in Zn concentrations of individual materials between farm systems (Table 9.14).…”

Section: A Role For Trace Element Budgetsmentioning

confidence: 99%

Micronutrient Deficiencies in Global Crop Production

Alloway¹

2008

216

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Fluxes of K, P, and Zn in a conventional and an organic dairy farming system through feed, animals, manure, and urine—a case study at Öjebyn, Sweden

Cited by 37 publications

References 8 publications

Potassium cycling and losses in grassland systems: a review

Potassium cycling and losses in grassland systems: a review

Critical aspects of potassium management in agricultural systems

Micronutrient Deficiencies in Global Crop Production

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