S. A. Ogorodniaia, M. A. Butylkina, S. R. Krasikov, A. A. Dymov
{"title":"科米共和国中部北方森林砍伐区上层矿质土壤地层的物理特性","authors":"S. A. Ogorodniaia, M. A. Butylkina, S. R. Krasikov, A. A. Dymov","doi":"10.3103/s0147687424700108","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Changes in physical properties of podzolic soils (Albic Retisols) were analyzed three years after the cutting of the coniferous–deciduous forest in the middle boreal forest of the Komi Republic with three- and ten-times forwarder passes, as well as after leveling out the deep ruts left after ten passes. The study gained insight into an influence of the different numbers of passes on soil density, filtration coefficient, as well as resistance to wedging and compression. A hypothesis was made with respect to various mechanisms of soil changes—specifically, three forwarder passes lead to compression, while ten passes result in compression and turbation, which was confirmed by measurements of soil density and penetration resistance. After three passes, compression was found to lead to an increase in density by 0.15 g cm<sup>‒3</sup> and penetration resistance by 25%, No changes were recorded in filtration rate. Ten forwarder passes promoted mixing, which neutralized the possible compaction due to introduction of forest-floor detritus into the upper mineral soil horizons. Likewise, a decrease in penetration values occurred by a factor of 2 or 3 compared to an undisturbed site, and water permeability on a skid trail dropped from 70 to 1 cm day<sup>–1</sup> after ten passes, It was found that leveling out the deep ruts led to an appreciable decline in soil density after 3 years, including in comparison with undisturbed soil of a cutting strip site. In addition, the filtration rate increased severalfold. Penetration resistance was, however, enhanced on the smoothed-out site. Estimation of the water retention curve approximation parameters by the van Genuchten formula made it possible to identify changes in soils of skid trails compared to a mechanically undisturbed site. Reduction in the range of mobile moisture was recorded as a result of compaction and ruts formed by heavy vehicles, resulting in stagnation of moisture in the ruts.</p>","PeriodicalId":501690,"journal":{"name":"Moscow University Soil Science Bulletin","volume":"26 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Physical Properties of Upper Mineral Soil Horizons in a Cutover Area of the Middle Boreal Forest in the Komi Republic\",\"authors\":\"S. A. Ogorodniaia, M. A. Butylkina, S. R. Krasikov, A. A. Dymov\",\"doi\":\"10.3103/s0147687424700108\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3><p>Changes in physical properties of podzolic soils (Albic Retisols) were analyzed three years after the cutting of the coniferous–deciduous forest in the middle boreal forest of the Komi Republic with three- and ten-times forwarder passes, as well as after leveling out the deep ruts left after ten passes. The study gained insight into an influence of the different numbers of passes on soil density, filtration coefficient, as well as resistance to wedging and compression. A hypothesis was made with respect to various mechanisms of soil changes—specifically, three forwarder passes lead to compression, while ten passes result in compression and turbation, which was confirmed by measurements of soil density and penetration resistance. After three passes, compression was found to lead to an increase in density by 0.15 g cm<sup>‒3</sup> and penetration resistance by 25%, No changes were recorded in filtration rate. Ten forwarder passes promoted mixing, which neutralized the possible compaction due to introduction of forest-floor detritus into the upper mineral soil horizons. Likewise, a decrease in penetration values occurred by a factor of 2 or 3 compared to an undisturbed site, and water permeability on a skid trail dropped from 70 to 1 cm day<sup>–1</sup> after ten passes, It was found that leveling out the deep ruts led to an appreciable decline in soil density after 3 years, including in comparison with undisturbed soil of a cutting strip site. In addition, the filtration rate increased severalfold. Penetration resistance was, however, enhanced on the smoothed-out site. Estimation of the water retention curve approximation parameters by the van Genuchten formula made it possible to identify changes in soils of skid trails compared to a mechanically undisturbed site. Reduction in the range of mobile moisture was recorded as a result of compaction and ruts formed by heavy vehicles, resulting in stagnation of moisture in the ruts.</p>\",\"PeriodicalId\":501690,\"journal\":{\"name\":\"Moscow University Soil Science Bulletin\",\"volume\":\"26 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-06-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Moscow University Soil Science Bulletin\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.3103/s0147687424700108\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Moscow University Soil Science Bulletin","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3103/s0147687424700108","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Physical Properties of Upper Mineral Soil Horizons in a Cutover Area of the Middle Boreal Forest in the Komi Republic
Abstract
Changes in physical properties of podzolic soils (Albic Retisols) were analyzed three years after the cutting of the coniferous–deciduous forest in the middle boreal forest of the Komi Republic with three- and ten-times forwarder passes, as well as after leveling out the deep ruts left after ten passes. The study gained insight into an influence of the different numbers of passes on soil density, filtration coefficient, as well as resistance to wedging and compression. A hypothesis was made with respect to various mechanisms of soil changes—specifically, three forwarder passes lead to compression, while ten passes result in compression and turbation, which was confirmed by measurements of soil density and penetration resistance. After three passes, compression was found to lead to an increase in density by 0.15 g cm‒3 and penetration resistance by 25%, No changes were recorded in filtration rate. Ten forwarder passes promoted mixing, which neutralized the possible compaction due to introduction of forest-floor detritus into the upper mineral soil horizons. Likewise, a decrease in penetration values occurred by a factor of 2 or 3 compared to an undisturbed site, and water permeability on a skid trail dropped from 70 to 1 cm day–1 after ten passes, It was found that leveling out the deep ruts led to an appreciable decline in soil density after 3 years, including in comparison with undisturbed soil of a cutting strip site. In addition, the filtration rate increased severalfold. Penetration resistance was, however, enhanced on the smoothed-out site. Estimation of the water retention curve approximation parameters by the van Genuchten formula made it possible to identify changes in soils of skid trails compared to a mechanically undisturbed site. Reduction in the range of mobile moisture was recorded as a result of compaction and ruts formed by heavy vehicles, resulting in stagnation of moisture in the ruts.
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