Can Organic Materials Reduce Excess Nutrient Leaching from Manure‐Rich Paddock Soils?. Issue 1 (1st January 2017)

• Record Type: Journal Article
• Authors: Parvage, Mohammed Masud; Ulén, Barbro; Kirchmann, Holger
• Is Part Of: Journal of Environmental Quality. Volume 46:Issue 1(2017)
• Page Start: 105
• Page End: 112
• Publication Date: 2017-01-01
• Subjects: Agricultural ecology -- Periodicals; Environmental engineering -- Periodicals; Pollution -- Periodicals; 630
• DOI: 10.2134/jeq2016.06.0223
• Languages: English
• ISSNs: 0047-2425

Abstract

Abstract : Horse paddocks have been identified as a significant contributor of animal waste nutrients to natural waters; thus, modified paddock management is needed. Because chemical amendments pose a health risk to horses, an alternative for reducing nutrient translocation from manure is to add available organic residues to the soil. To examine the feasibility of outdoor use of organic materials to reduce nutrient losses from paddock soils, three commonly available organic materials (peat, wheat straw, and wood chips) were tested for their nutrient retention capacities in batch experiments followed by leaching experiments in an in‐house lysimeter station using artificial rainfall. Results showed that the grounded peat and wood chips retained some phosphorus (P), whereas grounded wheat straw released P to the solution. In leaching experiments, peat reduced nitrogen (N) losses by 40% but increased P and carbon (C) losses severalfold. Wheat straw was ineffective in reducing P, N, or C losses and in some cases increased the losses. Wood chips effectively reduced P and C losses, by 70 and 40%, respectively, but not N losses. It was concluded that, among the three organic materials, only the wood chips can be used outdoors to reduce nutrient losses from paddock soils. Core Ideas: Paddock soils are "hot spots" for nutrient losses that need to be managed. The capacity of organic materials to reduce nutrient loss from soil is not widely known. Peat reduced N losses, and wood chips reduced both P and C losses. Wheat straw increased nutrient leaching losses.