文章摘要
苗淑杰,乔云发,周连仁.大豆在利用不同氮源时对土壤磷形态和有效性的影响[J].水土保持学报,2008,(1):83~86
大豆在利用不同氮源时对土壤磷形态和有效性的影响
Responses of Phosphorus Forms and Their Usefulness to Soybean Supplied with Different Nitrogen Sources
  修订日期:2007-08-12
DOI:
中文关键词: 大豆,氮源,磷形态,有效性
英文关键词: soybean,nitrogen source,phosphorus form,usefulness
基金项目:东北农业大学创新团队基金 , 黑龙江省博士后科研启动基金
苗淑杰  乔云发  周连仁
东北农业大学资源与环境学院 哈尔滨150030(苗淑杰,周连仁)
,中国科学院东北地理与农业生态研究所 哈尔滨150081(乔云发)
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中文摘要:
      通过盆栽培养方法,在土壤中可利用磷基本耗竭条件下,研究供给两种不同氮源的大豆对土壤中有机和无机磷的利用和形态转化的影响。结果表明,生物固氮处理大豆吸收的总磷量比尿素处理多58.0%,而对磷素的利用效率仅下降了3.3%。无论供给哪种形态氮源,种植大豆后土壤中各形态无机磷含量总体表现为O-P>Al-P>Fe-P>Ca10-P>Ca8-P>Ca2-P,有机磷的含量表现为:中等活性有机磷(MLOP)>高稳性有机磷(HROP)>中稳性有机磷(MROP)>活性有机磷(LOP)。生物固氮处理,Al-P和O-P成为维持大豆生长的主要磷源,而尿素处理只有O-P。生物固氮处理主要是促进土壤中的MLOP和MROP矿化分解,分别减少了29.48 mg/kg和14.16 mg/kg;尿素处理土壤中的MROP和HROP转化的程度较大,分别减少了12.47 mg/kg和3.68 mg/kg。比较而言,尿素处理的大豆从土壤中获得有机磷的能力不及生物固氮处理。
英文摘要:
      Study on the forms of organic and inorganic phosphorus(P) and their usefulness under available P depletion conditions through pot experiment.The results showed: amount of P absorbed by soybean supplied with nitrogen-fixation(N2-N) was larger 58.0% than urea supplication,but use efficiency was lower 3.3%.Inorganic P composing is O-P > Al-P > Fe-P > Ca10-P > Ca8-P > Ca2-P,organic P is MLOP>HROP>MROP>LOP,irrespective of nitrogen source supplication.For inorganic P,the main potential pool is Al-P and O-P for soybean supplied with N2-N,while supplication with urea is O-P.MLOP and MROP mineralization were promoted by soybean with N2-N,which contents decreased by 29.48 mg/kg and 14.16 mg/kg compared to no-plant CK treatment.In urea supplication treatment,MROP and HROP mineralization were higher than others,decreased by 12.47 mg/kg and 3.68 mg/kg,separately.These suggested that P absorbed by soybean with N2-N is larger than that with urea.
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