›› 1994, Vol. 2 ›› Issue (1): 1-8.DOI: 10.11733/j.issn.1007-0435.1994.01.001

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DYMANICS AND CYCLING OF PHOSPHORUS IN THE SOIL ECOSYSTEM IN LEYMUS CHINENSIS GRANSLAND

Fu Linqian1, Zhu Tingcheng2   

  1. 1. Chinese Academy of Agricultural Sciences, Beijing 100094;
    2. North-East Normal University, Changchun 130024
  • Online:1994-03-15 Published:2012-07-11

羊草草地土壤生态系统磷素转化及循环规律的研究

傅林谦1, 祝廷成2, 安瑞军3   

  1. 1. 中国农业科学院畜牧所, 北京 100094;
    2. 东北师范大学草地研究所, 长春, 130024;
    3. 内蒙古哲里木畜牧学院草原系, 通辽 028042

Abstract: Based on investigation at nature grassland in North-east of China,the rule of the alloca tion,dynamics,re1ations between P and ecological factors, and cycling of P were studied in soil at grazing and cutting grassland.The relations between various P and labil P were analysed in soil ecosystem also.The results were that:1.The output is about 3.14 and 7.34kg/ha·y,input is 2.75 and 2.00kg/ha·y seperatly in grazing and cutting grassland soil ecosystems.2.The reason of deteriorate was caused by the soil enviroment worsen,which blocked the cycles of elements in soil.3.The activity of soil ecosystem can be explained with the flowing rates and flowing capacities between pools rather than the budgets of pools.

Key words: Phosphorus, Leymus chinensis grassland, Soil ecosystem, Flowing rats, Flowing capacity

摘要: 本文基于对东北羊草草地的调查,研究了退化放牧地和保护区割草地生境土壤系统内几种形态磷素的分配、动态、土壤生态系统各形态磷素与土壤生态因子的关系以及速效磷和不同形态磷素之间的关系。分析了土壤生态系统中磷素转化及流通规律,得出规律如下:①放牧地和割草地生境内土壤系统的输出量分别是3.14kg/ha·y和734kg/ha·y;输入量分别是2.75kg/ha·y和2.00kg/ha·y。②从磷素在土壤系统内循林规律看,轻度退化草地主要是土壤环境因子恶化阻碍磷素的流通引起的。③土壤系统磷素在各库的贮量不能说明其活跃程度,而磷素在各库的流通量和流通速率可以表示出循环的活跃程度。

关键词: 磷素, 羊草草地, 土壤生态系统, 流通率, 流通量