Influence of selected maize cultivation technologies on changes in the labile fraction of soil organic matter sandy-loam cambisol soil structure

Kopecký, Marek; Peterka, Jiří; Kolář, Ladislav; Konvalina, Petr; Maroušek, Josef; Váchalová, Radka; Herout, Marcel; Strunecký, Otakar; Batt, Jana; Tran, Dang Khoa

doi:10.1016/j.still.2020.104865

Cited by 18 publications

(13 citation statements)

References 45 publications

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“…However, intercropping of cover crops reduced C lability on the soil surface (depth of 0.0–0.10 m). Particulate organic C benefits microbial activity and soil N availability (Kopecky et al., 2021) but is more susceptible to mineralization, which makes it difficult to increase soil particulate organic C content, as observed in the present study. In regions with lower temperatures and soils of medium and clayey texture, organic matter lability is 15–35% (Costa et al., 2020; Raphael et al., 2016), in part due to the higher N demand for mineral‐associated C formation (Cotrufo et al., 2019).…”

Section: Discussionsupporting

confidence: 54%

Soil organic carbon stock is improved by cover crops in a tropical sandy soil

et al. 2022

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Soil organic matter plays an important role in soil quality. In sandy soils of tropical regions, high biological activity in the soil accelerates mineralization and limits increases in organic matter content. The objective of this study was to evaluate the total organic C stock and the chemical and physical fractions of organic C in a sandy soil in Presidente Bernardes, São Paulo, Brazil, as a function of cover cropping with different combinations of grasses and legumes between 2015 and 2020. The treatments comprised fallow (control), cultivation of a single grass or intercropping of two grasses, one grass and one legume, or a mixture of two grasses and one legume during the offseason (April-September). Intercropping two grasses increased total dry matter production (shoot and root) by 138% and decreased the C/N ratio by 19% compared with the fallow and legume systems. The organic C stock in the soil was 46% higher in the mixed cover crop system (36.5 Mg ha −1 ) than in the fallow system (25 Mg ha −1 ). Humic acid (0.78-0.82 g kg −1 ) and humin (1.68-1.99 g kg −1 ) were lower in the systems with low dry matter production (fallow and grass + legume). Mineral-associated C content was 114% higher in the mixed cover crop system than in the fallow system. These results show that cover crops can increase C content in all fractions of organic matter in tropical sandy soil, even in a short period of time (5 yr), and that a mix of cover crops is the best option.

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Section: Discussionsupporting

confidence: 54%

Soil organic carbon stock is improved by cover crops in a tropical sandy soil

et al. 2022

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“…Fertiliser and crop rotation are essential agrotechnological factors influencing the formation of mobile humus forms (Tian t al., 2017;Kopecký et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effect of Fertiliser on Changes in Labile and Water-Soluble Forms of Humus in Short-Term Rotations

STASIV¹,

Kachmar²,

Vavrynovych³

et al. 2022

Scientific Horizons

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Mobile (labile and water-soluble) forms of humus are one of the basic components of effective soil fertility and a precondition for high productivity of crop rotations. As a result of fermentation, these forms of humus are mineralised and take part in plant nutrition, and some of them, being included in mobilisation processes, transition into stable humus substances. Therefore, it is important to investigate agrotechnological factors for managing their dynamics and redistribution in the soil environment during the growing season of agricultural crops. The purpose of the study: to investigate the effect of complex application of mineral and organic (conventional and alternative) fertilisers on the change of water-soluble and labile forms of humus during the growing season of agricultural crops grown in short-term rotations. The following research methods were used in this study: field, laboratory-analytical, computational-comparative, mathematicalstatistical. Higher level of labile accumulation (359.59 mg kg-1 of soil) and water-soluble (11.69 mg kg-1 of soil) humus forms under winter wheat crops occur when the predecessor of the crop in the crop rotation is meadow clover. The application of N60P90K90 specifically for winter wheat and 40 t/ha of manure in the conventional fertilisation system of grain-grass crop rotation contributes to the formation of 529.07 and 20.20 mg kg-1 of soil of the organic substances under study. The application of N120P100K100 and 40 t/ha of manure for corn for grain yields 567.42 and 22.55 mg kg-1 of soil, and N90P90K90 and 40 t/ha of manure for potatoes yields 543.66 and 21.75 mg kg-1 of mobile compounds humus. The obtained research results can serve as a basis for the development of highly efficient environmentally friendly farming systems and can be used for further scientific research on the development of ways and directions for managing humus-forming processes in the soil environment

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“…Moreover, farming methods (fertilization, tillage, irrigation, etc.) can affect the decomposition of organic matter [16,17]. For example, Li et al [18] found that N fertilization decreases SOM decomposition and increases the efficiency of C sequestration in the soil through a higher portion of undecomposed crop residues.…”

Section: Introductionmentioning

confidence: 99%

Fractionation of Soil Organic Matter into Labile and Stable Fractions

et al. 2021

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The present study aims to test and evaluate the efficiency of a new modified method of organic matter evaluation. It allows the assessment of the quality and quantity of the primary soil organic matter and the stable organic fractions separately. The new method was tested in six soil samples of different localities in the Czech Republic. This method is based on observing reaction kinetics during the oxidation of soil organic matter and measuring the cation-exchange capacity of stable organic fractions. The results were compared with classical methods, which rely on the isolation of humic substances, determination of the content of humic acids and fulvic acids and their ratio CHA:CFA, quotient E4/6, and fractionation of soil organic matter according to resistance to oxidation. It turned out that the results of the new modified method are more sensitive in comparison with the results obtained by classical procedures. The linear regression demonstrated the dependence between the amounts of soil organic matter determined by the classical method compared with the modified method. Moreover, the new modified method was found to be faster and not demanding on laboratory equipment. The new method has been improved to be easily repeatable, and some shortcomings of the previous method were eliminated. Based on our results and other recent studies, the modified method may be recommended for the practical evaluation of soil organic matter conditions.

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Influence of selected maize cultivation technologies on changes in the labile fraction of soil organic matter sandy-loam cambisol soil structure

Cited by 18 publications

References 45 publications

Soil organic carbon stock is improved by cover crops in a tropical sandy soil

Soil organic carbon stock is improved by cover crops in a tropical sandy soil

Effect of Fertiliser on Changes in Labile and Water-Soluble Forms of Humus in Short-Term Rotations

Fractionation of Soil Organic Matter into Labile and Stable Fractions

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