{"title":"道格拉斯冷杉幼林凋落物养分回归","authors":"J. Novák, D. Kacálek, D. Dušek","doi":"10.2478/forj-2020-0006","DOIUrl":null,"url":null,"abstract":"Abstract The use of Douglas fir (DF) is on the increase in the Czech Republic. This tree species shows a good production and also a beneficial impact on soil to some extent. We studied both amount and properties of litterfall in 18 to 20-year-old stands with DF in 2011. Two experimental plots were DF-dominated and one showed ca. 20 – 30% share of Scots pine (SP) at the beginning of observation. The experiments consisted of two treatments such as unthinned control and 50 – 62% trees’ density reduction accounting for 43 – 59% basal area reduction. Litterfall was collected using litter traps of 0.25 m2 area in 3 – 4 traps per treatment. Forest floor L and F were taken in 2011 and 2018 to investigate the development of their amount after thinning. Both whole-period sum and mean annual litterfall were reduced after thinning compared to controls. The mean annual litterfall totaled ca. 3 t ha−1 in 20-year-old DF–dominated stands. This amount represents an annual nutrient return of 30 – 40 kg N, 1 – 3 kg P, 3 – 5 kg K, 12 – 30 kg Ca and 1 – 2 kg Mg per one hectare. The reduction of the annual litterfall was more pronounced in DF–dominated stands. All thinned plots showed increased decomposition rates reflected in lower total L+F amounts in both DF–dominated plots whereas unthinned plots accumulated more L+F at the end. The mixed DF–SP plot showed reduced L and increased F layer amounts in both unthinned and thinned treatments with only minor change to L+F sum between 2011 and 2018.","PeriodicalId":45042,"journal":{"name":"Central European Forestry Journal","volume":"66 1","pages":"78 - 84"},"PeriodicalIF":1.4000,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Litterfall nutrient return in thinned young stands with Douglas fir\",\"authors\":\"J. Novák, D. Kacálek, D. Dušek\",\"doi\":\"10.2478/forj-2020-0006\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract The use of Douglas fir (DF) is on the increase in the Czech Republic. This tree species shows a good production and also a beneficial impact on soil to some extent. We studied both amount and properties of litterfall in 18 to 20-year-old stands with DF in 2011. Two experimental plots were DF-dominated and one showed ca. 20 – 30% share of Scots pine (SP) at the beginning of observation. The experiments consisted of two treatments such as unthinned control and 50 – 62% trees’ density reduction accounting for 43 – 59% basal area reduction. Litterfall was collected using litter traps of 0.25 m2 area in 3 – 4 traps per treatment. Forest floor L and F were taken in 2011 and 2018 to investigate the development of their amount after thinning. Both whole-period sum and mean annual litterfall were reduced after thinning compared to controls. The mean annual litterfall totaled ca. 3 t ha−1 in 20-year-old DF–dominated stands. This amount represents an annual nutrient return of 30 – 40 kg N, 1 – 3 kg P, 3 – 5 kg K, 12 – 30 kg Ca and 1 – 2 kg Mg per one hectare. The reduction of the annual litterfall was more pronounced in DF–dominated stands. All thinned plots showed increased decomposition rates reflected in lower total L+F amounts in both DF–dominated plots whereas unthinned plots accumulated more L+F at the end. The mixed DF–SP plot showed reduced L and increased F layer amounts in both unthinned and thinned treatments with only minor change to L+F sum between 2011 and 2018.\",\"PeriodicalId\":45042,\"journal\":{\"name\":\"Central European Forestry Journal\",\"volume\":\"66 1\",\"pages\":\"78 - 84\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2020-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Central European Forestry Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2478/forj-2020-0006\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"FORESTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Central European Forestry Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2478/forj-2020-0006","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FORESTRY","Score":null,"Total":0}
Litterfall nutrient return in thinned young stands with Douglas fir
Abstract The use of Douglas fir (DF) is on the increase in the Czech Republic. This tree species shows a good production and also a beneficial impact on soil to some extent. We studied both amount and properties of litterfall in 18 to 20-year-old stands with DF in 2011. Two experimental plots were DF-dominated and one showed ca. 20 – 30% share of Scots pine (SP) at the beginning of observation. The experiments consisted of two treatments such as unthinned control and 50 – 62% trees’ density reduction accounting for 43 – 59% basal area reduction. Litterfall was collected using litter traps of 0.25 m2 area in 3 – 4 traps per treatment. Forest floor L and F were taken in 2011 and 2018 to investigate the development of their amount after thinning. Both whole-period sum and mean annual litterfall were reduced after thinning compared to controls. The mean annual litterfall totaled ca. 3 t ha−1 in 20-year-old DF–dominated stands. This amount represents an annual nutrient return of 30 – 40 kg N, 1 – 3 kg P, 3 – 5 kg K, 12 – 30 kg Ca and 1 – 2 kg Mg per one hectare. The reduction of the annual litterfall was more pronounced in DF–dominated stands. All thinned plots showed increased decomposition rates reflected in lower total L+F amounts in both DF–dominated plots whereas unthinned plots accumulated more L+F at the end. The mixed DF–SP plot showed reduced L and increased F layer amounts in both unthinned and thinned treatments with only minor change to L+F sum between 2011 and 2018.
期刊介绍:
Central European Forestry Journal (published as Lesnícky Èasopis - Forestry Journal until 2016) publishes novel science originating from research in forestry and related braches. Central European Forestry Journal is a professional peer-reviewed scientific journal published 4-time a year. The journal contains original papers and review papers of basic and applied research from all fields of forestry and related disciplines. The editorial office accepts the manuscripts within the focus of the journal exclusively in English language. The journal does not have article processing charges (APCs) nor article submission charges. Central European Forestry Journal, abbreviation: Cent. Eur. For. J., publishes original papers and review papers of basic and applied research from all fields of forestry and related scientific areas. The journal focuses on forestry issues relevant for Europe, primarily Central European regions. Original works and review papers can be submitted only in English language.