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应用生态学报 ›› 2004, Vol. ›› Issue (5): 790-794.

• 研究论文 • 上一篇    下一篇

长期施肥对石灰性土壤磷素肥力的影响 Ⅱ.无机磷和有机磷

谢林花1, 吕家珑2, 张一平2, 刘利花2   

  • 收稿日期:2002-10-10 修回日期:2003-07-28
  • 通讯作者: 吕家珑
  • 基金资助:
    国家自然科学基金重大项目(39790100);教育部回国人员启动基金;陕西省自然科学基金资助项目(2002D09)

Influence of long-term fertilization on phosphorus fertility of calcareous soil Ⅱ.Inorganic and organic phosphorus.

XIE Linhua1, LÜ Jialong2, ZHANG Yipping2, LIU Lihua 2   

  1. 1. Environmental Engineering Teaching and Research Section, Shanxi University of Science and Technology, Xianyang 712081, China;
    2. National Key Laboratory of Soil and Water Erosion and Agriculture, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China
  • Received:2002-10-10 Revised:2003-07-28

摘要: 采用蒋柏藩-顾益初无机磷分级方法和灼烧法、Bowman-Cole的土壤有机磷分组方法,研究了定位试验23年的0~100cm土壤无机磷和有机磷的形态组成.结果表明,无机磷含量为厩肥>休闲>化肥>低秸>高秸>中秸>无肥.不同施肥处理土壤无机磷各组分的IPi值呈现以下特点:Ca2-P、Ca8-P、Al-P的IPi值较低,Ca10-P、Fe-P、O-P的IPi值较高.与无肥处理的无机磷各组分IPi值相比,厩肥与休闲处理Ca2-P、Ca8-P、Al-P的IPi值显著增大,Ca10-P、Fe-P、O-P的IPi值减小,其中以Ca10-P的IPi值减小较大.单施化肥处理Ca2-P、Ca8-P、Al-P、O-P的IPi值也增大,Ca10-P、Fe-P的IPi值减小,显示长期单施化肥不仅可明显提高Ca2-P、Ca8-P、Al-P含量,而且对O-P的增长有显著作用.3种秸秆处理基本上呈现Ca2-P、Ca8-P、AlP的IPi值增大,Ca10-P、Fe-P、O-P的IPi值减小趋势.从就有效磷(Ca2-P、Ca8-P、Al-P)含量而言,厩肥处理高于化肥处理,而单施化肥处理高于玉米秸秆处理.玉米秸秆配施化肥可显著增加土壤有机磷含量.对土壤有机磷库的贡献,玉米秸秆处理大于厩肥处理.施入有机肥,可增加土壤有机磷各组分的含量,而化肥则主要是促进土壤稳定性有机磷向活性、中活性有机磷转化.长期不施肥处理的土

关键词: 长期定位试验, 石灰性土壤, 无机磷分级, 有机磷分级

Abstract: By the Jiang-Gu inorganic phosphorus fractionation method and the Bowman-Cole organic phosphorus fractionation method,this paper studied the forms and compositions of inorganic and organic phosphorus in 0~100 cm layer of calcareous soil after 23 years located experiment.The result showed that the content of inorganic phosphorus was in the order of treatment animal manure>fallow>chemical fertilizer>low rate straw>high rate straw>medium rate straw>no fertilizer.The IP i value of inorganic phosphorus forms in different fertilizer treatments had the following characteristics:a) it was relatively low for Ca2-P,Ca8-P and Al-P,but relatively high for Ca10 -P,Fe-P and O-P;b) comparing with no fertilizer treatment,treatments animal manure and fallow had a notably high IP i value of Ca2-P,Ca8-P and Al-P and a low IP i value of Ca10 -P,Fe-P and O-P;while treatment chemical fertilizer had a high IP i value of Ca2-P,Ca8-P,Al-P and O-P,but a low IP i value of Ca10 -P and Fe-P;c) as for available phosphorus source (Ca2-P,Ca8-P and Al-P),their content was higher in treatment animal manure than in treatment chemical fertilizer,and higher in treatment chemical fertilizer than in treatments straws.A combined application of straw and chemical fertilizer could increase soil organic phosphorus content notably.Applying animal manure could increase the content of all organic phosphorus forms,while applying chemical fertilizer could promote the transformation of soil resistant organic phosphorus to labile and medium labile organic phosphorus.No fertilizer treatment had a relatively lower content of labile and medium labile organic phosphorus,but a relatively high content of resistant organic phosphorus.For treatment fallow,it had a relatively low content of soil organic matter and organic phosphorus,but a relatively high content of labile and medium resistant organic phosphorus.

Key words: Long-term located experiment, Calcareous soil, Fractionation of soil inorganic phosphorus, Fractionation of organic phosphorus

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