Nitrogen Fractions in Soil Fertilized with Waste Organic Materials

Jadwiga Wierzbowska,Dariusz Załuski,Stanisław Sienkiewicz

doi:10.3390/agronomy11081474

Jadwiga Wierzbowska, Dariusz Załuski + Show 1 more

Open Access

https://doi.org/10.3390/agronomy11081474

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Journal: Agronomy	Publication Date: Jul 25, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: University of Warmia and Mazury in Olsztyn

Abstract

The aim of the study was to determine the effect of sewage sludge and composts produced from sewage sludge and municipal waste on the content of various forms of nitrogen in soil. The field experiment was carried out in 2004–2015. It included three crop rotations of the following plants: potato, spring barley, winter oilseed rape and winter wheat. The experiment consisted of the following treatments: control (without fertilization), NPK, manure (FYM), compost from municipal sewage sludge and straw (CSSS), composted sewage sludge (CSS), dried and granulated sewage sludge (DGSS), “Dano” compost produced from unsorted municipal waste (CUMW) and compost from municipal green waste (CMGW). Manure, composts and sewage sludge were applied once (10 t ha−1 of d.m.) or twice (5 t ha−1 of d.m.) in a crop rotation. It was significantly shown that the highest N-total content was in the soil fertilized with CUMW (compost produced from unsorted municipal waste). The soil fertilized with manure (FYM) contained the highest quantity of N-min. The prevalent pool of nitrogen (82.65–86.52%) consisted of N compounds not undergoing acid hydrolysis, and their smallest share was determined in the soil fertilized with NPK alone.

Highlights

As well as being the major nutrient for all living organisms, nitrogen (N) plays a key role in the regulation of the composition, structure and functions of ecosystems [1,2]
The experiment consisted of the following objects: control—without fertilization (C), NPK; manure (FYM), compost from municipal sewage sludge and straw (CSSS), composed sewage sludge, (CSS), dried and granulated sewage sludge (DGSS), “Dano” compost produced from unsorted municipal waste (CUMW) and compost from municipal green waste (CMGW)
The soil enriched with 30 t d.m. ha−1 of waste organic matter had the N-total content higher by 22–32% than that in the control soil and by 8–17%

Summary

Introduction

As well as being the major nutrient for all living organisms, nitrogen (N) plays a key role in the regulation of the composition, structure and functions of ecosystems [1,2]. In soil, this element mostly occurs in organic bonds, which differ in decomposability depending on their structure [3]. The N-total content is one of the parameters describing soil fertility in agricultural ecosystems [9] The amount of this element in soil depends on several factors, for example soil use [10]. Numerous studies have been performed by many researchers, all failing to resolve unambiguously the question how agriculture, especially crop plantations, affects changes in the content of organic nitrogen in soils [9,10,11]

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