石漠化强度对桉树人工林生长的影响
在桂西北选择两种典型石漠化等级（即S1为中度级,S2为极重度级）的石山种植桉树,在营林4年后对桉树人工林植被进行调查.结果表明：（1）S1、S2的造林保存率分别为29.5％、21.5％,前者是后者的1.37倍.（2）S1、S2的平均胸径分别为9.01、6.72 cm,前者是后者的1.34倍;平均树高分别为8.41、6.43 m,前者是后者的1.31倍;平均蓄积量分别为17.65、5.95 m3/hm2,前者是后者的2.97倍.（3）S1、S2的林地基石裸露率分别为4.17％、14.11％,前者占后者的29.6％.说明在极强度石漠化条件下种植桉树的保存率及各项生长量指标都极显著低于中度石漠化环境...
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| Published in | 广东农业科学 Vol. 42; no. 7; pp. 32 - 36 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
河池市科技创新发展研究所,广西河池,547000%广西大学林学院,广西南宁,530004
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-874X |
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| Summary: | 在桂西北选择两种典型石漠化等级（即S1为中度级,S2为极重度级）的石山种植桉树,在营林4年后对桉树人工林植被进行调查.结果表明：（1）S1、S2的造林保存率分别为29.5％、21.5％,前者是后者的1.37倍.（2）S1、S2的平均胸径分别为9.01、6.72 cm,前者是后者的1.34倍;平均树高分别为8.41、6.43 m,前者是后者的1.31倍;平均蓄积量分别为17.65、5.95 m3/hm2,前者是后者的2.97倍.（3）S1、S2的林地基石裸露率分别为4.17％、14.11％,前者占后者的29.6％.说明在极强度石漠化条件下种植桉树的保存率及各项生长量指标都极显著低于中度石漠化环境,通过治理后,使原来石漠化强度分别下降在轻度级以内. |
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| Bibliography: | 44-1267/S karst rocky desertification; Eucalyptus plantation; Northwest Guangxi HUANG Yao-si;HUANG Cheng-biao;ZHANG Xiao-sheng;LU-Wei;YANG Gai-ren;LI Wen-yu;WEI Yu-shu（ （ 1. Institute of Hechi Integrated Study, Hechi 547000, China; 2. Forestry College of Guangxi University, Nanning 530004, China） To better understand the growth of Eucalyptus on the land of different grades of rocky desertification in karst region,and explore the method for the revegetation in karst rocky desertification land,two grades（S1：moderate desertification,S2：severe desertification）of rocky desertification land in Northwest Guangxi were selected for planting Eucalyptus. On the desertification land,the planting bank was built by brick,new soil from other site was filled in the bank before planting tree. The survival rate and growth of Eucalyptus were investigated in the 4th year of forestation. The results showed that,The survival rates of Eucalyptus in land S1 and S2 were 29.5% and 21.5%,respectively,the former was 1.37 times of the latte |
| ISSN: | 1004-874X |