Evaluation of availability of phosphorus reserved in Andisols for high yield of crop and savings of phosphorus resources.

评价Andisols中保留的磷对作物高产和磷资源节约的有效性。

• 批准号: 08660069
• 负责人: ITO Toyoaki
• 金额: $ 0.26万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660069/
• 关键词: Colloidal composition; Allophanic Andisols; Nonallophanic Andisols; Total soluble inorganic phosphorus; EDTA-NaF extractable phosphorus; Anion exchange resin extractable phosphorus; pH; Al injury; 蓄積無機態リン; 可溶性蓄積リン; EDTA-NaF抽出リン; 陰イオン交換樹脂抽出リン

Phosphorus (P) fertility of Andisols was evaluated with reference to colloidal composition of soils. P sorption capacity was strongly correlated to active aluminum (allophane and Al-humus complex). Nonallophanic Andisols with major active aluminum of Al-humus complex showed a higher P sorption capacity per active aluminum than allophanic Andisols with major active aluminum of allophane. Soil available P content decreased with increasing of P sorption capacity of soil.Total soluble inorganic P reserved in soil was extracted by EDTA-NaF solution. Plant absorbed greater amounts of P from allophanic Andisol than nonallophanic Andisol with equal level of total soluble P and available P (Truog and Bray methods). Nonallophanic Andisol needed more available P for good plant growth with compared to allophanic Andisol. Allophanic Andisol showed higher value of Truog-P and anion exchange resin extractable P than nonallophanic Andisol with equal amount of total soluble P.However, nonallophanic Andisol showed higher value of Bray-P and acetic acid extractable P than allophanic Andisol with equal amount of total soluble P.It was concluded that the accurate evaluation of P availability of Andisols must be conducted by extraction methods in consideration for soil colloidal composition.Plant available P decreased in nonallophanic Andisol with low pH less than 5.3.Soil available P contents did not change within the pH range of 4.5 to 7.0. In low pH,the inhibition of root elongation by Al injury caused the reduction in P absorption of plant.

Andisols 的磷 (P) 肥力根据土壤的胶体成分进行评估。 P 吸附能力与活性铝（水铝英石和铝腐殖质复合物）密切相关。以铝腐殖质复合物为主要活性铝的非水铝英安迪溶胶表现出比以水铝英石为主活性铝的水铝英安溶胶更高的每活性铝的磷吸附能力。土壤速效磷含量随着土壤吸磷能力的增加而降低。采用EDTA-NaF溶液提取土壤中保留的可溶性无机磷。在总可溶性磷和有效磷水平相同的情况下，植物从水脲基安迪索中吸收的磷量高于非水脲基安迪索中的磷（Truog 和 Bray 方法）。与水铝酸安迪索相比，非水铝酸安迪索需要更多的可用磷来实现植物的良好生长。与等量总可溶性 P 的非脲基 Andisol 相比，脲基 Andisol 的 Truog-P 和阴离子交换树脂可萃取 P 值更高。然而，非脲基 Andisol 的 Bray-P 和乙酸可萃取 P 值比等量总可溶性 P 的脲基 Andisol 更高。结论是，要准确评价安地土中磷的有效性，必须通过考虑土壤胶体成分的提取方法进行。植物有效磷在pH小于5.3的低pH范围内，非脲基安地松的含量降低。土壤速效磷含量在pH 4.5至7.0范围内没有变化。低pH条件下,铝损伤抑制根系伸长,导致植物对磷的吸收减少。

项目成果

伊藤豊彰: "黒ボク土の酸性化に伴う活性Al,リン酸吸着活性およびリン酸可給性" 川渡農場報告. 12. 1-7 (1996)

伊东丰明：“与黑北土壤酸化相关的活性铝、磷酸盐吸附活性和磷酸盐有效性”川渡农场报告（Kawatari Farm Report）。

伊藤 豊彰: "黒ボク土の酸性化に伴う活性Al,リン酸吸着活性およびリン酸可給性" 川渡農場報告. 12. 1-7 (1996)

伊东丰明：“与黑北土壤酸化相关的活性铝、磷酸盐吸附活性和磷酸盐有效性”川渡农场报告（Kawatari Farm Report）。

Toyoaki Ito: "invariability of active aluminum contents, phosphate adsorption activity and phosphate availability with acidification in Andisols." Bulletin of The Experimental Farm, Tohoku University. 8. 1-7 (1996)

Toyoaki Ito：“Andisols 中的活性铝含量、磷酸盐吸附活性和磷酸盐可用性在酸化过程中保持不变。”