Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/119594
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Type: Journal article
Title: Mixing organic amendments with high and low C/N ratio influences nutrient availability and leaching in sandy soil
Author: Le, T.H.X.
Marschner, P.
Citation: Journal of Soil Science and Plant Nutrition, 2018; 18(4):952-964
Publisher: Instituto de Agroindustria, Universidad de La Frontera
Issue Date: 2018
ISSN: 0718-9516
Statement of
Responsibility: 
Thi Huong Xuan Le and Petra Marschner
Abstract: Little is known about available N and P, microbial biomass and leachate N and P concentration in mixes of organic materials differing in C/N ratio. Sandy soil was amended with wheat straw (W, C/N 71) and cow manure (CM, C/N 7) either alone (100W and 100CM) or in different ratios (values are weight percentage of the organic materials): 75W-25CM, 50W-50CM, 25W-75CM. The control was unamended soil. Moist soil was incubated for 26 days, leaching was carried out on days 10 and 25. Soil was sampled on day 9 (before first leaching) and day 26 (after the second leaching Cumulative respiration over 26 days was similar in the unamended control and 100CM, it increased with proportion of W in the amendments. Per kg of soil, amended soils did not differ in available N, microbial biomass N (MBN) and leachate inorganic N concentration, but available P and leachate inorganic P increased with proportion of CM in the amendment. However, available N, MBN and inorganic N in leachate per g N added was highest in 100W and lowest in 100CM. In contrast, available P and leachate P concentration per g P added increased with proportion of CM. Measured available N and leachate inorganic N were lower than expected values whereas measured available P and inorganic P in the leachate were higher than expected. In mixes, CM appears to reduce N mineralisation in wheat whereas W stimulates P release from cow manure.
Keywords: Available N; available P; leached N; leached P; cow manure; organic amendment mixtures; wheat straw
Rights: CC BY_NC Creative Commons License This is an open-access article distributed under the terms of the Creative Commons Attribution License
RMID: 0030110796
DOI: 10.4067/S0718-95162018005002703
Appears in Collections:Agriculture, Food and Wine publications

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