Carbohydrates and Amino Compounds as Short-Term Indicators of Soil Management

Citation:
Carbohydrates and Amino Compounds as Short-Term Indicators of Soil Management, Abdelrahman, Hamada, Cocozza Claudio, Olk Dan, Ventrella Domenico, and Miano Teodoro , CLEAN - Soil Air Water · October 2016, Volume 45, Issue 1, p.1–8, (2017) copy at www.tinyurl.com/hcpa8rk

Abstract:

The objective of this work was to evaluate the suitability of carbohydrates and amino compounds in soil and soil organic matter (SOM) fractions to depict the management‐induced changes in soil over short‐term course. Soil samples were collected from two experimental fields managed according to organic farming regulations and a sequential fractionation procedure was applied to separate the light fraction (LF), particulate organic matter (POM), and mobile humic acid (MHA). Contents of carbohydrates and amino compounds were determined in soil and correspondent SOM fractions. Over a 2‐year course, carbohydrate contents decreased in the LF fraction while it increased noticeably in the POM and slightly in the MHA fractions leading into questioning whether decomposing materials get incorporated into older fractions. Amino N content constituted up to 30% of total soil N, with a major contribution of the humic fraction (MHA). Although the LF, POM, and MHA fractions showed the greatest amino N content after the compost‐legumes combinations, the carbohydrate and amino N contents in the POM and MHA fractions of the unamended soil increased as large as the corresponding fertilized plots, underlining that conservative soil management results in accumulation of labile forms of soil C and N that consequently might build up soil fertility. The changes after different treatments suggest the suitability of carbohydrates and amino compounds as short‐term indicators for soil management.

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