| 高国雄,周心澄,史常青,李文忠,李世荣.北川河流域低位脑山区退耕还林的土壤效应[J].干旱地区农业研究,2008,(5):205~211 |
| 北川河流域低位脑山区退耕还林的土壤效应 |
| Soil effects of converted farmland in remote hilly areas in Beichuanhe Watershed |
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| DOI：10.7606/j.issn.1000-7601.2008.05.42 |
| 中文关键词: 土壤效应 退耕还林 配置模式 北川河流域 脑山区 |
| 英文关键词:soil effect converting cropland to forest model of species distribution Beichuanhe Watershed remote hilly areas |
| 基金项目:国家科技攻关计划项目 (2001BA510B01) |
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| 中文摘要: |
| 在青海大通县北川河流域低位脑山区选取了青海云杉（F）、华北落叶松（G）、白桦＋青海云杉（H）、青海云杉＋中国沙棘（J）、油菜（CK）等５种退耕还林配置模式，比较了不同配置模式对土壤理化性质的影响。结果表明：土壤总孔隙度、稳渗速率以模式F（青海云杉）的最大，分别为53.62%、6.8 mm/min；土壤结构系数以模式H（白桦+青海云杉）最大，为94.751%；土壤全N、水解N、全K、速效K平均值以模式F（青海云杉）的最高；土壤抗性指数以模式F（青海云杉）的最大，为1.652 s/g。土壤效应综合评价得分以模式F最高，表明模式F为低位脑山区退耕还林最佳配置模式。 |
| 英文摘要: |
| After five models of converting cropland to forest were selected respectively in high-mountain areas in Beichuanhe Watershed of Datong County in Qinghai Province, the soil effects were analyzed. Model F (Picea crassifolia) was better than others on the total pore space and the final infiltration rate of soil, which were 53.62% and 6.8mm/min respectively. Model H (Betula latyphylla+Picea crassifolia) occupied the first place in soil structural coefficient, up to 94.751%. As to the average content of total N, hydrolytic N, total K, rapidly available K and rapidly available K, model F ranked the first place. The soil anti-scourability of model F (Picea crassifolia) ranked the first place, which was 1.652 s/g. The quality synthetic evaluation about soil effect of converting cropland to forest was carried on, and it showed that disposition pattern F was the most superior one. |
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