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中国沙漠 ›› 2001, Vol. 21 ›› Issue (2): 195-199.

• 研究论文 • 上一篇    下一篇

流沙和改良后土壤无机磷形态分级及其有效性研究

段争虎, 肖洪浪   

  1. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃兰州 730000
  • 收稿日期:2000-03-05 修回日期:2000-10-19 出版日期:2001-06-20 发布日期:2001-06-20
  • 作者简介:段争虎(1962-),男(汉族),硕士,副研究员,主要从事干早区土城和土地资源研究
  • 基金资助:
    中国科学院"九五"重大项目(KZ951-A1-301);中国科学院寒区旱区环境与工程研究所知识创新项目(KZCXZ10028)

Fractionation and Availability of Soil Inorganic Phosphorus in Sand Soil and Improved One

DUAN Zheng-hu, XIAO Hong-fang   

  1. Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2000-03-05 Revised:2000-10-19 Online:2001-06-20 Published:2001-06-20

摘要: 应用蒋柏藩和顾益初提出的石灰性土壤无机磷分级方法,对沙坡头地区流沙及改良土壤无机磷分级进行了研究,并对其有效性做出评价。结果表明,流沙中Ca2-P占无机磷总量的3.1%,Ca8-P占11.4%,AI-P占7.0%,Fe-P占5.3%,O-P占0.14%和Ca10-P占73.2%;改良土壤中Ca2-P占无机磷总量的1.7%,Ca8-P占7.2%,AI-P占5.1%,Fe-P占3.8%,O-P占0.08%和Ca10-P占82.12%。其中Ca2-P与Ca8-P是作物磷素营养的主要来源,A1-P、Fe-P为缓效磷源,而 O-P和 Ca10-P只是一种潜在磷源。生物试验表明,改良土的供肥能力强,肥力水平高;而流沙对施肥反应敏感,产量增加显著。

关键词: 无机磷, 形态, 有效性, 磷素, 流沙

Abstract: Using Jiang Bofan and Gu Yichu's fractionation method for calcareous soil's inorganic phosphorus, we have studied the efficacy of aeolian soil's inorganic phosphorus in the processes of shifting sand fixation in Shapotou region. The results indicated that Ca2-P accounts for 3.1% of total inorganic phosphorus, Ca8-P 11.4%, ALP 7.0%, Fe-P 5.3%,O-P0.14% and Ca10-P 73.2% in shifting sand soil, respectively; Ca2-P accounts for 1.7% of total inorganic phosphorus, Cas-P 7.2%, AI-P 5. 1%, Fe-P 3.8%, O-P 0.08% and Ca10-P 82.12% in ameliorated soil, respectively. Among these Ca2-P and Ca8-P are main fraction of crop phosphorus nutrition, Al-P and Fe-P are postpone phosphorus, O-P and Ca10-P are all potential phosphorus.

Key words: inorganic phosphorus, fractionationl efficacy phosphorus nutrition, shifting sand

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