Edgard Fleury Koula Mikieleko, Y. Bocko, Grace Jopaul Loubota-Panzou, J. Loumeto
{"title":"刚果共和国北部半落叶森林两层细根动态研究","authors":"Edgard Fleury Koula Mikieleko, Y. Bocko, Grace Jopaul Loubota-Panzou, J. Loumeto","doi":"10.4236/OJF.2021.113013","DOIUrl":null,"url":null,"abstract":"The \nbelowground biomass is represented by coarse and fine roots. Concentrated in \nthe superficial horizons of the soil, the fine roots play a crucial role in the \nfunctioning of a forest ecosystem. However, studies on their dynamics in \nnatural forests are almost non-existent in the Republic of Congo. Here, we \nestimated the biomass, production, turnover and fine root lifespan of two \nforest strata of a semi-deciduous forest: the Gilbertiodendron dewevrei (De Wild.) J. Leonard forest (GF) and the mixed forest (MF) of land. The \ningrowth cores method was used to estimate the biomass, production, turnover \nand lifespan of fine roots. The results of this study revealed that the \nbiomass, production and fine root turnover of the two forest strata studied \nsignificantly decreased with increasing soil depth, with an increase in \nlifespan. The annual fine root biomass of GF (2284.50 ± 37.62 and 1034.61 ± 14.52 ) was slightly lower than that of MF \n(2430.07 ± 40.68 and 1043.10 ± 11.75 ) in the \n0-15 cm and 15-30 cm horizons, respectively. The annual production of fine \nroots from these latter horizons was respectively 1300.19 ± 32.17 and 539.18 ± 11.55 in GF and 1362.24 ± 39.59 and 492.95 ± 14.38 in the MF. Root turnover \nwas higher in the GF (1.68 ± 0.05 and 1.35 ± 0.03 ) \nthan in the MF (1.57 ± 0.05 and 1.13 ± 0.02 ). \nThe lifespan of fine roots increased with the depth of the soil. The difference \nin fine root dynamics observed between the forest strata studied was influenced \nby the Evenness index and the above-ground biomass.","PeriodicalId":63552,"journal":{"name":"林学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Fine Roots Dynamics in Two Forest Strata of a Semi-Deciduous Forest in Northern Republic of Congo\",\"authors\":\"Edgard Fleury Koula Mikieleko, Y. Bocko, Grace Jopaul Loubota-Panzou, J. Loumeto\",\"doi\":\"10.4236/OJF.2021.113013\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The \\nbelowground biomass is represented by coarse and fine roots. Concentrated in \\nthe superficial horizons of the soil, the fine roots play a crucial role in the \\nfunctioning of a forest ecosystem. However, studies on their dynamics in \\nnatural forests are almost non-existent in the Republic of Congo. Here, we \\nestimated the biomass, production, turnover and fine root lifespan of two \\nforest strata of a semi-deciduous forest: the Gilbertiodendron dewevrei (De Wild.) J. Leonard forest (GF) and the mixed forest (MF) of land. The \\ningrowth cores method was used to estimate the biomass, production, turnover \\nand lifespan of fine roots. The results of this study revealed that the \\nbiomass, production and fine root turnover of the two forest strata studied \\nsignificantly decreased with increasing soil depth, with an increase in \\nlifespan. The annual fine root biomass of GF (2284.50 ± 37.62 and 1034.61 ± 14.52 ) was slightly lower than that of MF \\n(2430.07 ± 40.68 and 1043.10 ± 11.75 ) in the \\n0-15 cm and 15-30 cm horizons, respectively. The annual production of fine \\nroots from these latter horizons was respectively 1300.19 ± 32.17 and 539.18 ± 11.55 in GF and 1362.24 ± 39.59 and 492.95 ± 14.38 in the MF. Root turnover \\nwas higher in the GF (1.68 ± 0.05 and 1.35 ± 0.03 ) \\nthan in the MF (1.57 ± 0.05 and 1.13 ± 0.02 ). \\nThe lifespan of fine roots increased with the depth of the soil. The difference \\nin fine root dynamics observed between the forest strata studied was influenced \\nby the Evenness index and the above-ground biomass.\",\"PeriodicalId\":63552,\"journal\":{\"name\":\"林学期刊(英文)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-06-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"林学期刊(英文)\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://doi.org/10.4236/OJF.2021.113013\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"林学期刊(英文)","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.4236/OJF.2021.113013","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Fine Roots Dynamics in Two Forest Strata of a Semi-Deciduous Forest in Northern Republic of Congo
The
belowground biomass is represented by coarse and fine roots. Concentrated in
the superficial horizons of the soil, the fine roots play a crucial role in the
functioning of a forest ecosystem. However, studies on their dynamics in
natural forests are almost non-existent in the Republic of Congo. Here, we
estimated the biomass, production, turnover and fine root lifespan of two
forest strata of a semi-deciduous forest: the Gilbertiodendron dewevrei (De Wild.) J. Leonard forest (GF) and the mixed forest (MF) of land. The
ingrowth cores method was used to estimate the biomass, production, turnover
and lifespan of fine roots. The results of this study revealed that the
biomass, production and fine root turnover of the two forest strata studied
significantly decreased with increasing soil depth, with an increase in
lifespan. The annual fine root biomass of GF (2284.50 ± 37.62 and 1034.61 ± 14.52 ) was slightly lower than that of MF
(2430.07 ± 40.68 and 1043.10 ± 11.75 ) in the
0-15 cm and 15-30 cm horizons, respectively. The annual production of fine
roots from these latter horizons was respectively 1300.19 ± 32.17 and 539.18 ± 11.55 in GF and 1362.24 ± 39.59 and 492.95 ± 14.38 in the MF. Root turnover
was higher in the GF (1.68 ± 0.05 and 1.35 ± 0.03 )
than in the MF (1.57 ± 0.05 and 1.13 ± 0.02 ).
The lifespan of fine roots increased with the depth of the soil. The difference
in fine root dynamics observed between the forest strata studied was influenced
by the Evenness index and the above-ground biomass.