| 黄淮海平原农林生态系统N、P、K营养元素循环——以泡桐-小麦、玉米间作系统为例 |
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| 引用本文： | 吴刚,冯宗炜,王效科,刘国华.黄淮海平原农林生态系统N、P、K营养元素循环——以泡桐-小麦、玉米间作系统为例[J].应用生态学报,1993(2). |
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| 作者姓名： | 吴刚 冯宗炜 王效科 刘国华 |
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| 作者单位： | 中国科学院生态环境研究中心，中国科学院生态环境研究中心，中国科学院生态环境研究中心，中国科学院生态环境研究中心 北京 100080，北京 100080，北京 100080，北京 100080 |
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| 基金项目： | 中国科学院封丘农业生态实验站基金 |
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| 摘 要： | 农林生态系统泡桐-小麦、玉米间作类型N、P、K营养元素循环研究表明,在整个群落中,P发生亏损,N和K基本平衡;在植物组分库和枯落物库中,N、P、K均发生累积;在土壤库中,N、P、K均发生亏损。土壤表层(0—20cm)中N和P的含量是限制农作物生长的主要因子。20—80cm土层中P的含量是限制泡桐生长的主要因子。群落内N、P、K的吸收系数分别为0.078、0.014、0.052,利用系数分别为0.95、0.90、0.94,循环系数分别为0.042、0.05、0.063.
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| 关 键 词： | 氮 磷 钾 循环 农林生态系统 |
N, P and K recyclings in an agroforestrial ecosystem of Huanghuaihai plain: with Paulownia elongata-intercropped wheat and maize as an example. |
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| Wu Gang,Feng Zongwei,Wang Xiaoke and Liu Guohua.N, P and K recyclings in an agroforestrial ecosystem of Huanghuaihai plain: with Paulownia elongata-intercropped wheat and maize as an example.[J].Chinese Journal of Applied Ecology,1993(2). |
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| Authors: | Wu Gang Feng Zongwei Wang Xiaoke and Liu Guohua |
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| Abstract: | The studies show that in the whole community, P is deficient, and N and K are basically balanced. N, P and K are accumulated in plant tissues and litters, but depleted in soil. N and P contents in surface soil(0-20cm) are the main factors affecting crop growth, and P content in 20-80cm soil layer in the major one affecting Paulownia elongata growth. The absorption coefficients of N, P and K in the communities are respectively 0.078, 0.014 and 0.052, their utilization coefficients are respectively 0.95, 0.90 and 0.94, and their recycling coefficients are respectively 0.042, 0.05 and 0.063. |
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| Keywords: | Nitrogen Phosphorus Potassium Recycling Agroforestrial ecosystem |
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