{"title":"埃塞俄比亚蓝桉薪材人工林的产量模型","authors":"T. Pukkala, V. Pohjonen","doi":"10.1016/0144-4565(90)90054-N","DOIUrl":null,"url":null,"abstract":"<div><p>Based on 53 tree analyses and 105 sample plots of <em>Eucalyptus globulus</em>, models for volume and biomass at single tree and stand levels were developed. The possible growing sites were divided into four site classes. In seedling stands, the site class I corresponds to yield class 44 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>, in coppice stands to yield class 46 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>. The site class IV corresponds in seedling stand to yield class 9 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>, in coppice stands to yield class 13 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>. The maximum mean annual increment was reached in seedling stands at the age of 18–19 years, in coppice stands at the age of 14 years.</p></div>","PeriodicalId":100179,"journal":{"name":"Biomass","volume":"21 2","pages":"Pages 129-143"},"PeriodicalIF":0.0000,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0144-4565(90)90054-N","citationCount":"14","resultStr":"{\"title\":\"Yield models for Eucalyptus globulus fuelwood plantations in Ethiopia\",\"authors\":\"T. Pukkala, V. Pohjonen\",\"doi\":\"10.1016/0144-4565(90)90054-N\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Based on 53 tree analyses and 105 sample plots of <em>Eucalyptus globulus</em>, models for volume and biomass at single tree and stand levels were developed. The possible growing sites were divided into four site classes. In seedling stands, the site class I corresponds to yield class 44 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>, in coppice stands to yield class 46 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>. The site class IV corresponds in seedling stand to yield class 9 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>, in coppice stands to yield class 13 m<sup>3</sup> ha<sup>−1</sup> year<sup>−1</sup>. The maximum mean annual increment was reached in seedling stands at the age of 18–19 years, in coppice stands at the age of 14 years.</p></div>\",\"PeriodicalId\":100179,\"journal\":{\"name\":\"Biomass\",\"volume\":\"21 2\",\"pages\":\"Pages 129-143\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1990-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0144-4565(90)90054-N\",\"citationCount\":\"14\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biomass\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/014445659090054N\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomass","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/014445659090054N","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Yield models for Eucalyptus globulus fuelwood plantations in Ethiopia
Based on 53 tree analyses and 105 sample plots of Eucalyptus globulus, models for volume and biomass at single tree and stand levels were developed. The possible growing sites were divided into four site classes. In seedling stands, the site class I corresponds to yield class 44 m3 ha−1 year−1, in coppice stands to yield class 46 m3 ha−1 year−1. The site class IV corresponds in seedling stand to yield class 9 m3 ha−1 year−1, in coppice stands to yield class 13 m3 ha−1 year−1. The maximum mean annual increment was reached in seedling stands at the age of 18–19 years, in coppice stands at the age of 14 years.