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| 氮、磷和水分供给对羊草枯叶分解质量的影响 | |
| 引用本文： | 黄菊莹,余海龙,袁志友,李凌浩.氮、磷和水分供给对羊草枯叶分解质量的影响[J].植物生态学报,2011,35(8):808-815. |
| 作者姓名： | 黄菊莹 余海龙 袁志友 李凌浩 |
| 作者单位： | 宁夏大学新技术应用研究开发中心, 银川 750021; 中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093; 宁夏大学资源环境学院,银川 750021 |
| 基金项目： | 国家自然科学基金(31000215); 宁夏自然科学基金(NZ1003)资助 |
| 摘 要： | 研究不同氮(N)、磷(P)和水分梯度上植物枯叶的N和P浓度及C : N和C : P的响应格局, 对于预测N沉降增加和降水格局改变对枯叶分解乃至养分循环的潜在影响具有一定的实践意义。该研究通过3个盆栽控制试验(N、P添加试验: 0、0.5、1.0、2.0、4.0、8.0、16.0、32.0、64.0和128.0 g N(P)·m?2 10个水平; 控水试验: 3 600、3 900、4 500、5 100、6 000、7 200、9 000、12 000、18 000和36 000 mL?pot?1 10个水平), 探讨了这些环境因子改变对羊草(Leymus chinensis)枯叶分解质量的影响。结果表明, 在一定范围内, N添加提高了羊草枯叶的N浓度, 降低了C : N, 对P浓度和C : P没有明显的影响; P添加提高了枯叶的N和P浓度, 降低了C : N和C : P; 供水量增加显著降低了枯叶的N和P浓度, 提高了C : N和C : P。这表明, N、P和水分因子的改变影响了植物枯叶的性状, 且不同梯度的影响程度不同。因此, 全球气候变化可能影响植物枯叶的分解质量, 进而可能改变植被-土壤系统的养分循环。 |
| 关 键 词： | 羊草 枯叶分解质量 氮供给 磷供给 水分供给 |
| 收稿时间： | 2010-12-28 |
| 修稿时间： | 2011-06-28 |
Effects of nitrogen,phosphorus and water supply on litter decomposition quality of senescing leaves of Leymus chinensis |
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| HUANG Ju-Ying,YU Hai-Long,YUAN Zhi-You,LI Ling-Hao.Effects of nitrogen,phosphorus and water supply on litter decomposition quality of senescing leaves of Leymus chinensis[J].Acta Phytoecologica Sinica,2011,35(8):808-815. | |
| Authors: | HUANG Ju-Ying YU Hai-Long YUAN Zhi-You LI Ling-Hao |
| Affiliation: | Development Center of New Technique Application and Research, Ningxia University, Yinchuan 750021, China; State Key Laboratory of Vegetation andEnvironmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; School of Recources and Environment, Ningxia University,Yinchuan 750021, China |
| Abstract: | Aims Changes in atmospheric nitrogen (N) and precipitation are two important aspects of global climate change. They have altered biogeochemical cycling in ecosystems and are expected to affect plant nutrient use strategy and litter decomposition. Methods We used three pot experiments, i.e., N addition (0, 0.5, 1.0, 2.0, 4.0, 8.0, 16.0, 32.0, 64.0 and 128.0 g N·m–2), phosphorus (P) addition (same levels) and water addition (3 600, 3 900, 4 500, 5 100, 6 000, 7 200, 9 000, 12 000, 18 000 and 36 000 mL·pot–1), to study N and P concentrations and C : N and C : P in senescing leaves of Leymus chinensis. Important findings N addition increased N concentration and decreased C : N, but did not significantly affect P concentration and C : P. P addition increased N and P concentrations and decreased C : N and C : P. Water addition decreased N and P concentrations and increased C : N and C : P. Therefore, changes in N, P and water availabilities affect litter decomposition quality and have effects on nutrient cycling in the plant-soil ecosystem. |
| Keywords: | Leymus chinensis litter decomposition quality nitrogen supply phosphorus supply water supply |
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