Status of humus in soil under various long-term tillage systems

Šlepetienė, Alvyra; Šlepetys, J.

doi:10.1016/j.geoderma.2004.12.001

Cited by 40 publications

(28 citation statements)

References 11 publications

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“…Na ausência de revolvimento do solo, as diferenças na composição das substâncias húmicas são reguladas principalmente pela atividade microbiana, 23 ou seja, o abandono da prática de revolvimento do solo favorece a humificação e a formação de moléculas de maior massa molar, favorecendo, portanto, a condensação natural e prevalência de C-AH no solo. 24 O cultivo de cafeeiro em área originalmente sob floresta primária, recém-desmatada, acarretou uma diminuição dos teores de C-AH e aumento de C-AF na superfície, enquanto que, em subsuperfície, houve diminuição de ambas as frações. 25 Na sub-bacia do Rio das Mortes, há uma expressiva escassez de dados a respeito da influência dos diferentes manejos das culturas implantadas sobre as propriedades da matéria orgânica do solo.…”

Section: Introductionunclassified

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Júnior¹,

Silva²,

Curi³

et al. 2008

Quím. Nova

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IndIcadores químIcos de qualIdade da matérIa orgânIca de solo da sub-bacIa do rIo das mortes sob manejos dIferencIaIs de cafeeIro antônio claret oliveira júnior* Instituto Nacional de Colonização e Reforma Agrária, Av. Afonso Pena, 2403, 79002-073 Campo Grande -MS, Brasil carlos alberto silva, nilton curi e luiz roberto guimarães guilherme Departamento de Ciência do Solo, Universidade Federal de Lavras, CP 3037, 37200-000 Lavras -MG, Brasil otacílio josé Passos rangel Escola Agrotécnica Federal de Alegre, CP 47, 29500-000 Alegre-ES, BrasilRecebido em 3/1/08; aceito em 14/5/08; publicado na web em 22/9/08 CHEMICAL INDICATORS OF THE QUALITY OF ORGANIC MATTER OF SOIL FROM THE RIO DAS MORTES WATERSHED UNDER DIFFERENT COFFEE PLANT MANAGEMENTS. This work evaluated the chemical quality of organic matter (OM) of a Brazilian Oxisol cultivated with coffee plants, under organic and conventional managements. Total organic C (TOC), light fraction C (LF-C) and C in humic (HA-C) and fulvic (FA-C) acids fractions was measured. Amongst the evaluated indexes, TOC and LF-C discriminated better OM attributes as a function of management. The stratification ratio (TOC 5-10cm /TOC 10-20cm ) did not show differences between the systems studied. The organic system can contribute to the sustainability of coffee plantations in Brazil, because it maintains the chemical attributes of OM closer to the indexes verified under forest conditions.

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Section: Introductionunclassified

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Júnior¹,

Silva²,

Curi³

et al. 2008

Quím. Nova

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“…In both experiments, the content of humus in the 0-10 and 10-20 cm soil layers in the shallow soil tillage system was significantly higher than in the 20-30 cm layer. In minimum tillage treatments, in both experiments mobile humic acids content increased within the whole 0-30 cm depth compared to conventional tillage (Slepetiene, Slepetys, 2005). Feiza et al (2011) also confirmed that on both loam and sandy loam long-term no-tillage application resulted in a significant increase in carbon content in the upper soil layer.…”

Section: Introductionmentioning

confidence: 73%

Long-term effect of tillage systems, straw and green manure combinations on soil organic matter

Bogužas

Mikučionienė

Šlepetienė

et al. 2015

Zemdirbyste-Agriculture

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Nowadays the priority in agriculture is given to the soil tillage systems which enable reduction of organic matter decomposition. Our investigation was aimed to assess the long-term impact of reduced intensity tillage systems, straw and green manure combinations on soil organic matter quantity and quality. Since 1999, a long-term field experiment has been done at the Experimental Station of Aleksandras Stulginskis University (former Lithuanian University of Agriculture) at 54º52′50′′ N latitude and 23º49′41′′ E longitude. The results presented in this paper were obtained in the 12 th and 14 th years of investigations. The soil of the experimental site is Epieutric Endocalcaric Endogleyic Planosol. Continuous long-term (12 and 14 years) straw application increased soil organic carbon (SOC) content by 9.3% and 12.0% compared with the plots without straw. Reduced tillage systems without primary tillage (shallow rotovating before sowing, catch cropping for green manure with rotovating, no-tillage) were even more effective. Compared with conventional ploughing, SOC increased by 19.4% to 33.9%. These tillage systems increased soil quality too, since SOC stratification ratio between 0-10 and 10-20 cm layers increased by 1.14 till 1.21. Reduced tillage systems with primary tillage (shallow ploughing and shallow loosening) had no effect both on SOC and stratification process in the soil. SOC pools over the experimental years tended to increase by 9.3% and 11.6% in the treatments of long-term application of straw compared with the plots without straw. Notillage and catch cropping for green manure with rotovating compared with conventional ploughing significantly increased the pools of organic carbon by 31.7% to 33.3% in the plots without straw and by 28.9% to 32.7% in the plots with straw. Continuous straw application increased the quantity of mobile humus substances by 22.7% compared to the plots without straw. Straw in combination with catch crop for green manure incorporation and rotovating and no-tillage increased mobile humus substances by 53.2% and 58.8% compared with conventional ploughing. Only long-term application of straw increased the quantity of mobile humic acids by 40.6% compared with the plots without straw. The rate of mobile humic acids from total amount of mobile humus substances in the treatments without straw amounted to 39.8%, while with straw this content increased to 45.6%. Reduced tillage systems without primary tillage had no significant effect on mobile humic acids but tended to increase soil organic matter quality.

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“…SOM was fractionated into 3 humic acid (C ha ), 4 fulvic acid (C fa ), and base-insoluble fractions. A detailed description of this fractionation method can be found in Ponomareva and Plotnikova (1980) and Slepetiene and Slepetys (2005). The content of available phosphorus and exchangeable potassium was determined by Machigin's method for calcareous soils, using 1% ammonium carbonate ((NH 4 ) 2 CO 3 ) solution (Machigin, 1952;Arinushkina, 1970).…”

Section: Methodsmentioning

confidence: 99%

Indicators of agricultural soil genesis under varying conditions of land use, Steppe Crimea

2015

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This study investigates the effects of agricultural exploitation of soils of the north-western Crimea, the active and large-scale cultivation of which began with the Greek colonization of the area. In order to compare soils using a wide spectrum of physical and chemical properties, the studied objects (virgin land, post-antique idle land, continually plowed land, modern-day plowed land, idle land of the modern era) have been grouped into a chronosequence. This makes it possible to apply the method of factor sequences of agrogenic transformations in soils, which takes into account different periods of human activities. The other factors involved in soil formation are considered to be relatively invariable. From the mass of physiochemical properties of these soils that have endured long-term agricultural stress, the most informative indicators of agrogenesis have been identified. The authors propose a procedure for calculating an integral agrophysical soil indicator based on five parameters that can be used to determine the soil structure and cloddiness as well as water-stability, the amount of waterstable aggregates and their mean mass-weighted diameter. Based on the estimates of their agrophysical state, the following sequence has been determined for the soils studied: Post-antique idle land b virgin land b idle land of the modern era b continuously plowed land b modern-day plowed land. It has been established that the previous practices of land use favorably affect the agrophysical properties of soils. The loss of organic carbon in continually plowed land is 51%, while in modern-day plowed and idle lands it amounts to 39% and 27-32% respectively. The reproduction of soil organic matter (SOM) and its quality, particularly of its labile content, which is responsible for the agrophysical properties of a plow horizon, is central to soil fertility management for sustainable agriculture. One observed effect of long-term agrogenic stresses in plowed horizons of Chernozems is a decrease in microelements such as Co, Ni, Mn, Cu, Zn, Pb, as well as phosphorus and potassium. It is estimated that the micronutrient content of plowed land is 5-6% lower than that of virgin soils. Even after 2280 years of renaturation, soils of post-antique idle lands preserve in their pedomemory the signs of agrogenesis. In terms of soil quality, the overall agrogenic transformation of soils cultivated during the recent period (the last 150-165 years) is 15% lower than that of the continually plowed lands. The fallowing regime provides conditions that allow soils to regenerate within a few decades. The use of renaturation effects that mimic the fallowing regime opens up new possibilities for resource-saving sustainable agriculture. This study, therefore, shows the informative potential of soils that have continuously, or with restorative periods, been subjected to long-term agrogenic impacts under different practices of land use. It also considers how this information may be actively employed to comprehend the long-term transformations of the ...

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Status of humus in soil under various long-term tillage systems

Cited by 40 publications

References 11 publications

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Indicadores químicos de qualidade da matéria orgânica de solo da sub-bacia do Rio das Mortes sob manejos diferenciais de cafeeiro

Long-term effect of tillage systems, straw and green manure combinations on soil organic matter

Indicators of agricultural soil genesis under varying conditions of land use, Steppe Crimea

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