章古台沙地不同树种年龄和树种的生态系统叶片和土壤养分研究
对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(O-15cm)土壤养分进行研究。结果表明，不同年龄樟子松(45、29和20年)(Pinus sylvestris var.mongolica)林地表层土壤养分并无显著差别，而29年樟子松林分表层土壤全N、全P和N：P比显著高于相近年龄的赤松(P.densiflora)(29年)和油松林(P.tabulaeformis)(31年)。随着樟子松年龄的增加，叶片P含量逐渐减少，而叶片N和K含量则未表现出随年龄而变化的趋势；对于年龄相近的三个树种，叶片N和P含量表现为：樟子松>赤松>油松，而叶片K含量在三个树种中并无显著差别。表层...
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| Published in | Journal of forestry research Vol. 15; no. 1; pp. 11 - 18 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese English |
| Published |
中国科学院沈阳应用生态所,沈阳110016
2004
|
| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-662X 1993-0607 |
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| Abstract | 对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(O-15cm)土壤养分进行研究。结果表明，不同年龄樟子松(45、29和20年)(Pinus sylvestris var.mongolica)林地表层土壤养分并无显著差别，而29年樟子松林分表层土壤全N、全P和N：P比显著高于相近年龄的赤松(P.densiflora)(29年)和油松林(P.tabulaeformis)(31年)。随着樟子松年龄的增加，叶片P含量逐渐减少，而叶片N和K含量则未表现出随年龄而变化的趋势；对于年龄相近的三个树种，叶片N和P含量表现为：樟子松>赤松>油松，而叶片K含量在三个树种中并无显著差别。表层土壤的全N和全P，有机质和全P以及叶片N和P含量之间表现出了显著的相关性，但是，林分表层土壤养分和树木针叶养分之间并无显著相关关系，这可能与当地对凋落物的过度收集，过度放牧以及土壤水分含量低有关。最后，根据国外研究结果引入N：P比阈值来分析研究区域的N．P养分状况，基于章古台地区这几种针叶树种针叶N：P比，我们认为研究区域的樟子松随着年龄的增加受N限制的可能性降低，29年的赤松林整体表现出不受N和P养分限制，而31年的油松林则表现为系统N和P都供应不足。图3表3参45。 |
|---|---|
| AbstractList | 对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(O-15cm)土壤养分进行研究。结果表明，不同年龄樟子松(45、29和20年)(Pinus sylvestris var.mongolica)林地表层土壤养分并无显著差别，而29年樟子松林分表层土壤全N、全P和N：P比显著高于相近年龄的赤松(P.densiflora)(29年)和油松林(P.tabulaeformis)(31年)。随着樟子松年龄的增加，叶片P含量逐渐减少，而叶片N和K含量则未表现出随年龄而变化的趋势；对于年龄相近的三个树种，叶片N和P含量表现为：樟子松>赤松>油松，而叶片K含量在三个树种中并无显著差别。表层土壤的全N和全P，有机质和全P以及叶片N和P含量之间表现出了显著的相关性，但是，林分表层土壤养分和树木针叶养分之间并无显著相关关系，这可能与当地对凋落物的过度收集，过度放牧以及土壤水分含量低有关。最后，根据国外研究结果引入N：P比阈值来分析研究区域的N．P养分状况，基于章古台地区这几种针叶树种针叶N：P比，我们认为研究区域的樟子松随着年龄的增加受N限制的可能性降低，29年的赤松林整体表现出不受N和P养分限制，而31年的油松林则表现为系统N和P都供应不足。图3表3参45。 S718.55; 对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(0-15cm)土壤养分进行研究.结果表明,不同年龄樟子松(45、29和20年) (Pinus sylvestris var. mongolica)林地表层土壤养分并无显著差别,而29年樟子松林分表层土壤全N、全P和N: P比显著高于相近年龄的赤松(P. densiflora) (29年)和油松林(P. tabulaeformis)(31年).随着樟子松年龄的增加,叶片P含量逐渐减少,而叶片N和K含量则未表现出随年龄而变化的趋势;对于年龄相近的三个树种,叶片N和P含量表现为:樟子松>赤松>油松,而叶片K含量在三个树种中并无显著差别.表层土壤的全N和全P,有机质和全P以及叶片N和P含量之间表现出了显著的相关性,但是,林分表层土壤养分和树木针叶养分之间并无显著相关关系,这可能与当地对凋落物的过度收集,过度放牧以及土壤水分含量低有关.最后,根据国外研究结果引入N: P比阈值来分析研究区域的N, P养分状况,基于章古台地区这几种针叶树种针叶N: P比,我们认为研究区域的樟子松随着年龄的增加受N限制的可能性降低,29年的赤松林整体表现出不受N和P养分限制,而31年的油松林则表现为系统N和P都供应不足.图3表3参45. |
| Abstract_FL | The concentrations of the foliar and surface soil nutrients and the variation with species and stand age were studied in Pinus spp. plantations in Zhanggutai area, northeast China. The results showed that the total N, total P and C: N ratio of the soil in P. sylvestris var. mongolica stands were significantly higher in comparison with those in P. tabulaeformis and P. densiflora stands. For P. sylvestris var. mongolica, the foliar P concentration appeared to decrease with age, and the foliar N and K concentrations did not show a consistent change with age. As for the different tree species of the similar age, the foliar N and P concentrations were significantly different (p<0.05), being with P. sylvestris var. mongolica > P. densiflora > P. tabulaeformis. The foliar N: P ratio of P. densiflora significantly was higher than P. sylvestris var. mongolica and P. tabulaeformis, while the foliar K was no obvious difference between the three tree species. There were significant correlation (p<0.05) between soil total N and P, soil organic matter and total P, foliar N and P, but it did not show significant correlations between soil and foliar nutrient concentrations, which might attribute to the excessive litter raking, overgrazing and low soil moisture in this area. Based on the foliar N: P ratio, we introduced a combination threshold index of N: P ratio with their absolute foliar nutrient concentrations to determine the possible limiting nutrient. According to the critical N: P ratio and their absolute foliar N, P concentrations, the P. sylvestris var. mongolica stands showed a decreased N limitation degree with age, the P. densiflora stands showed unlimited by N and P in the whole, and the P. tabulaeformis stands showed co-limited by N and P. No significant difference in soil nutrient concentrations of the surface soils was found between 45, 29, 20-yr-old Pinus sylvestris var. mongolica plantation stands. |
| Author | 陈广生 曾德慧 陈伏生 |
| AuthorAffiliation | 中国科学院沈阳应用生态所，沈阳110016 |
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| Author_FL | CHEN Guang-Sheng ZENG De-hui CHEN Fu-sheng |
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| Author_xml | – sequence: 1 fullname: 陈广生 曾德慧 陈伏生 |
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| DocumentTitle_FL | Concentrations of foliar and surface soil in nutrients Pinus spp.plantations in relation to species and stand age in Zhanggutai sandy land,northeast China |
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| Keywords | Zhanggutai sandy land coniferous trees 限制性养分元素 limiting nutrients 章古台 针叶树 foliar nutrient concentration 叶片养分 N: P比 N: P ratio |
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| Snippet | 对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(O-15cm)土壤养分进行研究。结果表明，不同年龄樟子松(45、29和20年)(Pinus sylvestris var.mongolica)林地表... S718.55; 对辽宁省章古台地区的几种主要针叶树种的针叶养分及其林分表层(0-15cm)土壤养分进行研究.结果表明,不同年龄樟子松(45、29和20年) (Pinus sylvestris var.... |
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| SubjectTerms | 叶片 土壤养分 年龄 树种 沙地 生态系统 章古台地区 辽宁 |
| Title | 章古台沙地不同树种年龄和树种的生态系统叶片和土壤养分研究 |
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