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| 粤北石灰岩山地7个造林树种早期生长以及对根区土壤肥力的影响* |
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洪文君,黄川腾,徐瑞晶,莫惠芝,温伟良,吴永彬,庄雪影
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华南农业大学林学与风景园林学院,华南农业大学林学与风景园林学院,华南农业大学林学与风景园林学院,华南农业大学林学与风景园林学院,清新白湾省级自然保护区,华南农业大学林学与风景园林学院,华南农业大学林学与风景园林学院
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| 摘要: |
| 为人工促进粤北石灰岩退化森林植被的恢复提供树种选择依据。通过生长调查和土壤分析方法比较研究了广东清新县白湾石灰岩试验地7个阔叶树的早期生长表现及土壤肥力状况。结果表明：(1)任豆和喜树生长快速,其树高和冠幅年净生长量均达1m以上；枫香、铁冬青、楝叶吴茱萸、杨梅和光皮树的树高年生长量在0.5-0.9m之间,冠幅净生长量在0.3-0.5m之间。(2)土壤肥力检测结果表明,造林树种根区土壤有机质含量高于非根区土,反映了造林树种可改良土壤肥力,但不同树种对土壤养分的吸收和富集特性存在差异。铁冬青根区土壤有机质、全氮、全钾、碱解氮和有效钾含量较高；生长较快的任豆和喜树的土壤肥力较低,任豆根区的交换性钙含量明显低于其它树种。反映了树木生长可有效增加土壤有机质含量,但不同树种对土壤养分的吸收和富集特性存在差异。(3)基本以上研究结果,提出影响石灰岩造林的主要因素,为石灰岩造林技术提供理论基础。 |
| 关键词: 造林树种 石灰岩山地 早期生长 土壤肥力 |
| DOI： |
| 分类号:S728.9 |
| 基金项目: |
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| Early Growth of Seven Afforestation Tree Species and Their Impacts on Root-zone Soil Fertility in Limestone Area of North Guangdong |
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hongwenjun,huangchuanteng,xuruijing,mohuizhi,wenweiliang,wuyongbin and zhaungxueying
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South China Agricultural University,South China Agricultural University,South China Agricultural University,Baiwan Provincial Nature Reserve of Qingxin, Qingyuan City,South China Agricultural University,South China Agricultural University
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| Abstract: |
| It aims to provide the useful information on suitable plantation tree selection for rehabilitation of degraded vegetation by plantation in North Guangdong, China. Growth measure and soil fertility analysis were used for comparing of the growth and soil fertility of seven species of broad-leaved trees planted in a limestone afforested site of Baiwan, Qingxin District, northern Guangdong in 2009. The results showed that：(1)Zenia insignis and Camptotheca acuminata had the highest growth with 1 m of annual hight increasement. Next to Liquidambar formosana, Ilex rotunda, Swida wilsoniana, Tetradium glabrifolium, and Myrica rubra, which had 0.5-0.9 m of annual hight increasement and had 0.3-0.5m of annual crow increasement. (2)Examination of soil fertility showed that rhizospheric soil of the planted trees had higher organic matter content than that of non-planted soil. Total contents of nitrogen and potassium and available content of nitrogen and potassium at the rhizospheric soil of Ilex rotunda were higher. Rhizospheric soil fertility of the fast growing trees, Zenia insignis and Camptotheca acuminata, were not high. The content of exchanged Calcium of Zenia insignis was lower than other trees. It is indicated that trees could increase the soil organic matter content, but the nutrient uptake and accumulation varied with the trees. (3)Basic on the above results, it provided the afforestation technology and a theoretical for in limestone. |
| Key words: native tree limestone area early growth plantation |
