| 青海黄土丘陵区不同退耕还林模式生态效应 |
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| 引用本文： | 董旭.青海黄土丘陵区不同退耕还林模式生态效应[J].林业资源管理,2011(4). |
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| 作者姓名： | 董旭 |
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| 作者单位： | 青海省林业调查规划院,西宁,810007 |
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| 摘 要： | 基于野外采样、定点观测和室内实验,研究了青海黄土丘陵区不同退耕还林模式生态效应,结果表明相同林龄(8 a)的不同退耕还林模式(5种)水土效应:云杉桦树混交>桦树>云杉沙棘混交>云杉>沙棘>农田;生物效应:云杉桦树混交>沙棘>桦树>云杉>云杉沙棘混交>农田;小气候效应:云杉桦树混交>桦树>云杉沙棘混交>沙棘>云杉>农田。研究结果同时表明,相同退耕还林模式(沙棘)生产力效应随着林龄的增加而增加:10 a沙棘>8 a沙棘>3 a沙棘。
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| 关 键 词： | 黄土丘陵区 退耕还林模式 生态效应 生物量 |
Ecological Effects of Different Models of Conversion of Farmland to Forest in Hilly Loess Plateau in Qinghai Province |
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| DONG Xu.Ecological Effects of Different Models of Conversion of Farmland to Forest in Hilly Loess Plateau in Qinghai Province[J].Forest Resources Management,2011(4). |
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| Authors: | DONG Xu |
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| Abstract: | Based on field investigation and experimental data,the effects of soil and water conservation from different models of conversion of farmland to forest,were as follows:mixture of picea crassifolia and birch>birch>mixture of picea crassifolia and hippophae rhamnoides>picea crassifolia >hippophae rhamnoides>farmland,in hilly loess plateau in Qinghai province.The effects of biodiversity were as follows: mixture of picea crassifolia and birch >hippophae rhamnoides>birch>picea crassifolia >mixture of picea crassifolia and hippophae rhamnoides>farmland.The effects of microclimate were as follows:mixture of picea crassifolia and birch>birch>mixture of picea crassifolia and hippophae rhamnoides>hippophae rhamnoides>picea crassifolia>farmland.The study also showed the ecological effects were increasingly better as forest age increased. |
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| Keywords: | hilly loess plateau models of conversion of farmland to forest ecological effects biomass |
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