Low Nitrogen Retention in Soil and Litter under Conditions without Plants in a Subtropical Pine Plantation
文献类型：SCI/SSCI论文
| 作者 | Xiong Y. M.; Xu, X. L.; Zeng, H.; Wang, H. M.; Chen, F. S.; Guo, D. L. |
| 发表日期 | 2015 |
| 关键词 | northern hardwood forest terrestrial ecosystems fertilizer nitrogen temperate forest british-columbia determining n-15 n deposition douglas-fir fate nitrate |
| 英文摘要 | Soil acts as a major sink for added nitrogen (N) in forests, but it remains unclear about the capacity of soil to immobilize N under conditions without plant roots and whether added N interacts with ecosystem N to affect N retention. We added (NH4NO3)-N-15-N-15 to in situ soil columns (with leaching) and leaf litter (without leaching) of two tree species in a subtropical Pinus elliottii plantation. Soil and litter were collected three or eight months after N addition to measure concentrations of indigenous and exogenous N. About 70% of exogenous N was retained in soil three months after N addition, of which 65.9% were in inorganic forms. Eight months after N addition, 16.0% of exogenous N was retained in soil and 9.8%-13.6% was immobilized in litter. N addition increased the mineral release and nitrification of soil indigenous N. Loss of litter indigenous N was also increased by N addition. Our results suggest that N deposition on lands with low root activities or low soil carbon (C) contents may lead to increased N output due to low N immobilization. Moreover, the effects of added N on ecosystem indigenous N may decrease the capacity of soil and litter in N retention. |
| 出处 | Forests |
| 卷 | 6 |
| 期 | 7 |
| 页 | 2387-2404 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1999-4907 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38959]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xiong Y. M.,Xu, X. L.,Zeng, H.,et al. Low Nitrogen Retention in Soil and Litter under Conditions without Plants in a Subtropical Pine Plantation. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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