• ISSN 1008-505X
  • CN 11-3996/S

北方耕地和蔬菜保护地土壤磷素状况研究

Fractions of phosphorus in cultivated and vegetable soils in northern China

  • 摘要: 以北方一般耕地和蔬菜保护地为供试土壤 ,研究了不同种植条件下土壤磷素状况 ,蔬菜保护地土壤磷素的空间分布特性。结果表明 ,蔬菜保护地土壤全磷、无机磷、有机磷、Olsen-P的平均含量是一般耕地土壤的 2.7~14.0倍 ,土壤Olsen P占全磷的比率 ,Ca2-P ,Ca8-P ,Al-P占土壤无机磷的比率显著高于一般耕地土壤。蔬菜保护地土壤各形态磷素主要积累在 0~20cm土层 ,并随土层深度的增加各形态磷素的含量逐渐降低 ,各土层Olsen-P ,Ca2-P ,Ca8-P ,Al-P含量降低幅度明显高于Fe-P ,O-P ,Ca10-P含量的降低值

     

    Abstract: Fractions of phosphorus in cultivated and vegetable soil in northern China was studied. The main results showed that the content of total P,inorganic P, organic P in vegetable soil was 2.7~14.0 times as much as in cultivated soil.The percent of Olsen-P to total P and Ca2-P Ca8-P, Al-P, Fe-P to inorganic P was higher in vegetable soil than in cultivated soil. The contend of Olsen-P,Ca2-P, Ca8-P, Al-P in the profile of 20~40cm,40~60cm, 60~100cm soil were accounting for 34.6%, 15.3%, 10.7% of the depth of 0~20cm soil, respectively. The contents of total phosphorus and inorganic phosphorus in the profile of 20~40cm,40~60cm, 60~100cm soil were accounting for 44.0%, 30.4%, 23.6%. The positive correlation coefficient was indicated that Olsen-P was correlated significantly to total P, inorganic-P,organic-P,Ca2-P, Ca8-P, Al-P, Fe-P.

     

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