| 模拟外源性氮磷对马占相思凋落叶分解及土壤生化特性的影响 |
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| 引用本文： | 佘汉基,蔡金桓,薛立,郑欣颖.模拟外源性氮磷对马占相思凋落叶分解及土壤生化特性的影响[J].林业科学研究,2018,31(2):107-113. |
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| 作者姓名： | 佘汉基 蔡金桓 薛立 郑欣颖 |
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| 作者单位： | 华南农业大学林学与风景园林学院 |
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| 基金项目： | 中央财政林业科技推广示范项目"广东省生态公益林培育技术推广"（2015-GDTK-07） |
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| 摘 要： | 目的]研究外源性氮和磷对马占相思凋落叶的分解速率、分解过程中N、P、K含量和土壤生化特性的影响,以便为森林土壤养分管理提供参考。方法]以广东省云勇林场马占相思林下凋落叶为试验材料,采用尼龙网袋分解法,设置对照(CK)、施N(10 g·m~(-2))、施P(5 g·m~(-2))、施N+P(N 10 g·m~(-2)+P 5 g·m~(-2))4种处理,每隔3个月取样1次,并测定凋落叶残留量和N、P、K含量。结果]表明:施N、P和N+P处理对马占相思凋落叶的分解均为促进作用。各处理马占相思凋落叶的N含量在分解过程中大致保持稳定,施P和N+P处理的凋落叶P含量在分解过程中总体呈波动性上升,而各处理的凋落叶K含量变化规律不明显。施N、P和N+P处理提高了马占相思林土壤的有机质和全N含量,促进脲酶、磷酸酶及过氧化氢酶的活性。结论]施N、P和N+P处理促进了马占相思凋落叶的分解,有利于马占相思林的养分循环。
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| 关 键 词： | 马占相思 凋落叶 分解速率 外源性N和P 养分含量 土壤生化特性 |
| 收稿时间： | 2016/12/25 0:00:00 |
Effects of Nitrogen and Phosphorus Additions on Leaf Litter Decomposition and Soil Biochemical Characteristics in an Acacia mangium Plantation |
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| SHE Han-ji,CAI Jin-huan,XUE Li and ZHENG Xin-ying.Effects of Nitrogen and Phosphorus Additions on Leaf Litter Decomposition and Soil Biochemical Characteristics in an Acacia mangium Plantation[J].Forest Research,2018,31(2):107-113. |
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| Authors: | SHE Han-ji CAI Jin-huan XUE Li and ZHENG Xin-ying |
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| Institution: | College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong, China,College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong, China,College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong, China and College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong, China |
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| Abstract: | Objective] To study the effects of nitrogen and phosphorus additions on leaf litter decomposition, nutrient dynamics and soil biochemical characteristics during the decomposition process in a Acacia mangium plantation in order to understand the mechanism of influence of nitrogen and phosphorus on leaf litter decomposition of A. mangium and forest soil nutrient management. Method] Leaf litter decomposition of the A. mangium plantation in Yunyong Forest Farm was investigated using litter bag method. N and P additions were designed in four treatments:the control, N addition (N 10 g·m-2), P addition (P 5g·m-2), and N+P addition (N 10g·m-2+P 5g·m-2). It was sampled in a three-month interval and then the remaining leaf litter and N, P, K contents were analyzed. Result] The N, P and N+P additions improved leaf litter decomposition. The N content of leaf litter with the four treatments remained stable. The P content of leaf litter with P and N+P additions tended to increase and were greater than their initial value during litter decomposition process. The K content of leaf litter with the four treatments changed irregularly. The N, P and N+P additions significantly increased soil organic matter and total N contents and improved activities of soil urease, acid phosphatase and catalase. Conclusion] N, P and N+P additions accelerated leaf litter decomposition of the A. mangium, which improved the nutrient cycling of A. mangium plantation. |
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| Keywords: | Acacia mangium leaf litter decomposition rate N and P additions nutrient content soil biochemical characteristics |
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