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| 两种草本层台湾桤木林地细根分解及养分动态研究 | |
| 引用本文： | 王敬,范川,李贤伟,张健,李光勋,荣丽.两种草本层台湾桤木林地细根分解及养分动态研究[J].水土保持学报,2008,22(6). |
| 作者姓名： | 王敬 范川 李贤伟 张健 李光勋 荣丽 |
| 作者单位： | 1. 四川农业大学,生态林业工程省级重点实验室,四川,雅安,625014;四川省自贡市林业局,四川,自贡,643000 2. 四川农业大学,生态林业工程省级重点实验室,四川,雅安,625014 3. 中国科学院成都生物研究所,四川,成都,610041 |
| 基金项目： | 国家自然科学基金，国家科技支撑计划，教育部重点建设学科博士点基金，四川省教育厅重点实验室项目 |
| 摘 要： | 在四川省丹棱县退耕还林地上,采用网袋法对两种草本层(黑麦草和自然草)台湾桤木林地中细根分解及养分释放的对比,以及对台湾桤木 黑麦草复合模式草根与细根混合分解进行了为期1 a的实验研究。结果表明:台湾桤木细根在复合模式和自然模式中分解速率、养分释放有所不同,经过1 a的分解,复合模式中N,K,Ca的残留率显著低于自然模式,而干质量、P,Mg的残留率差异不显著;复合模式混合处理的分解速率和N,P,K,Ca释放率介于单独分解的细根和草根之间,而Mg释放率则大于单独分解的细根和草根,经过1 a的分解,混合分解对混合处理的分解速率、P,K,Mg的释放有明显的促进作用,对N,Ca的释放影响不显著,在混合分解过程中的不同阶段,表现出来的相互作用形式不同。 |
| 关 键 词： | 台湾桤木 黑麦草 细根 草根 分解 养分动态 |
Study on Fine Root Decomposition and Nutrient Dynamics in Alnus formosana Woodland Covered with Two Herbages |
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| WANG Jing,FAN Chuan,LI Xian-wei,ZHANG Jian,LI Guang-xun,RONG Li.Study on Fine Root Decomposition and Nutrient Dynamics in Alnus formosana Woodland Covered with Two Herbages[J].Journal of Soil and Water Conservation,2008,22(6). | |
| Authors: | WANG Jing FAN Chuan LI Xian-wei ZHANG Jian LI Guang-xun RONG Li |
| Institution: | WANG Jing1,2,FAN Chuan1,LI Xian-wei1,ZHANG Jian1,LI Guang-xun3,RONG Li1 |
| Abstract: | Decomposition and nutrient release of fine root in Alnus formosana woodland covered with two herbages(Lolium multiflorum lam and natural grass) as well as mixed decomposition of grass root and fine root in woodland with intercropping system of Alnus formosana and Lolium multiflorum lam was studied by buried bag experiment at Danling county in Sichuan province last year.The results showed that the rate of dry weight loss and nutrient release of fine root were different between intercropping system and natural system,after one year's decomposition,the remaining percentages of N,K,Ca in intercropping system were significantly lower than them in natural system,but the remaining percentages of P,Mg and dry weight had no significant difference between the two systems.Mixed root decomposition rate and the release rate of N,P,K,Ca lay between the decomposition rate of single fine root and single grass root,however,its release rate of Mg was higher than them in intercropping system.After one year's decomposition,mixed decomposition significantly enhanced the decomposition rate as well as the release rate of P,K,Mg except for N,Ca.Moreover,the interactions between fine root and grass root were different in the different phase of mixed decomposition. |
| Keywords: | Alnus formosana Lolium multiflorum fine root grass root decomposition nutrient dynamics |
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