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应用生态学报 ›› 1993, Vol. 4 ›› Issue (2): 141-145.

• 研究论文 • 上一篇    下一篇

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

吴刚, 冯宗炜, 王效科, 刘国华   

  1. 中国科学院生态环境研究中心, 北京 100080
  • 收稿日期:1992-04-17 修回日期:1992-06-05 出版日期:1993-04-25 发布日期:1993-04-25
  • 基金资助:

    中国科学院封丘农业生态实验站基金资助项目

N, P and K recyclings in an agroforestrial ecosystem of Huanghuaihai plain: with Paulownia elongata-intercropped wheat and maize as an example

Wu Gang, Feng Zongwei, Wang Xiaoke, Liu Guohua   

  1. Research Center for Eco-environmental Sciences, Academia Sinica, Beijing 100080
  • Received:1992-04-17 Revised:1992-06-05 Online:1993-04-25 Published:1993-04-25

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.

关键词: 氮, 磷, 钾, 循环, 农林生态系统, 净初级生产力, 高程, 坡度, 光能利用率模型, SEBAL模型

Abstract: The studies show that in the whole community, Pis deficient, and Nand Kare basically balanced. N, Pand Kare accumulated in plant tissues and litters, but depleted in soil. Nand Pcontents in surface soil(0-20cm) are the main factors affecting crop growth, and Pcontent in20-80cm soil layer in the major one affecting Paulownia elongata growth. The absorption coefficients of N, Pand Kin 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.

Key words: Nitrogen, Phosphorus, Potassium, Recycling, Agroforestrial ecosystem, slope., SEBAL model, elevation, light utility efficiency model, net primary productivity