ISSN:
1475-2743
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract. The effects of pig slurry applications to a hydrologically isolated field treatment plant (at Solepur) were studied over a period of eight years. Thirty repeated doses, averaging 160 m3 ha−1 were applied from April to October of each year (1991–1995), to reach a total application of 4930 m3 ha−1. All slurry samples were analysed for their total solids (TS), macronutrient (C, N, P, K, Ca) and micronutrient (Cu, Zn) content. In total, 284 tonnes of total solids (57 t TS ha−1 yr−1), 115 tonnes of carbon (23 t C ha−1yr−1), 24.5 tonnes of nitrogen (4900 kg N ha−1 yr−1), 7964 kg of phosphorus (1593 kg P ha−1 yr−1), 16 518 kg of potassium (3304 kg K ha−1 yr−1), 183 kg copper (37 kg Cu ha−1 yr−1) and 266 kg zinc (53 kg Zn ha−1 yr−1) were applied to the soil. Thus, this site provides an opportunity to assess the balance and to examine the long-term behaviour of nutrients under conditions of intensive land application of pig slurries or similar effluents.The main nutrient fluxes through the soil-water system were determined for each element. Over 40% of the total carbon applied was retained by the soil. About 25% of the slurry nitrogen applied remained in the soil profile and 12.5% was leached through the drainage water as nitrate. Most of the slurry phosphorus applied was retained in the soil profile either as P-Dyer extractable (83%), or as total soil phosphorus (112%); 〈0.01% was found in the drainage water. Forty-three per cent of the potassium applied in the slurry was recovered from the soil profile and 15% was recovered in the drainage water. Most of the copper (62%) and zinc (74%) applied in the slurry remained in the soil as EDTA extractractable forms; very low percentages (0.05% and 0.6% respectively) were found in the drainage water.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1475-2743.2000.tb00183.x
