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| 集约经营雷竹林土壤磷素状况及流失潜能 | |
| 引用本文： | 陈闻,吴家森,许开平,姜培坤.集约经营雷竹林土壤磷素状况及流失潜能[J].浙江林学院学报,2011,28(5):687-693. |
| 作者姓名： | 陈闻 吴家森 许开平 姜培坤 |
| 作者单位： | 1. 浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安 311300;浙江农林大学环境与资源学院,浙江临安 311300 2. 浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安,311300 3. 浙江农林大学环境与资源学院,浙江临安,311300 |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2008ZX07101-006); 浙江省水利厅科技计划项目(RC1019) |
| 摘 要： | 为了解集约经营雷竹Phyllostachys praecox林土壤磷素状况及流失风险，从浙江省临安市太湖源镇10块典型的雷竹林地采集土壤样品。通过等温吸附实验及利用Langmuir等温方程，对雷竹林土壤磷的流失阈值及流失潜能进行了探讨。结果表明：10块雷竹林地的土壤有效磷质量分数平均为169.25 mg·kg－1。 用Langmuir等温方程来拟合，相关性达到极显著水平（R2 = 0.987 ~ 0.999）。所有调查样地土壤的磷零点吸附平衡质量浓度（CEPC0）值远远超过了0.02 mg·L－1；磷吸附饱和度（DPS）平均值为46.18%，最高的达82.94%，有7块样地的DPS值明显高出临界值（25.00%）。土壤有效磷与CaCl2-P呈极显著线性相关，雷竹林土壤发生磷素流失的有效磷“阈值”为52.52 mg·kg－1，10块样地中有9块样地的有效磷质量分数超过了阈值，最高的达到该“阈值”的5.5倍。通过Langmuir方程，求得雷竹林土壤的标准需磷量为8.14 ~ 64.66 kg·hm－2，平均为27.41 kg·hm－2。图2表2参29 |
| 关 键 词： | 土壤学 雷竹 土壤磷 阈值 流失潜能 |
Soil phosphorus and potential loss in Phyllostachys praecox stands with intensive management |
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| CHEN Wen,WU Jia-sen,XU Kai-ping,JIANG Pei-kun.Soil phosphorus and potential loss in Phyllostachys praecox stands with intensive management[J].Journal of Zhejiang Forestry College,2011,28(5):687-693. | |
| Authors: | CHEN Wen WU Jia-sen XU Kai-ping JIANG Pei-kun |
| Institution: | CHEN Wen1,2,WU Jia-sen1,XU Kai-ping2,JIANG Pei-kun1,2(1.The Nurturing Station for the State Key Laboratory of Subtropical Silviculture,Zhejiang A & F University,Lin'an 311300,Zhejiang,China,2.School of Environment and Resource,China) |
| Abstract: | To reveal the soil phosphorus(P)status and its leaching risk for Phyllostachys praecox stands under intensive management with winter mulching and excessive fertilization,10 compositing surface(0-30 cm) soil samples were collected in typical sites located across 5 villages in Lin'an,Zhejiang.The soil P loss threshold value and its potential for Ph.praecox stands were then determined by isothermal adsorption-desorption and the Langmuir isotherm equation.Results showed that the average available phosphorus for... |
| Keywords: | soil science Phyllostachys praecox soil phosphorus threshold value loss potential |
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