Extraction of Organic Phosphorus in Andosols by Various Methods
スポンサーリンク
概要
- 論文の詳細を見る
The amounts of inorganic (P_i) and organic (P_o) phosphorus extracted by the Truog, Bray II, Olsen, and Citrate methods, in upland soils consisting of three Andosols and a Yellow soil, with different levels of fertilization were determined. In the soils subjected to the application of both chemical fertilizers and organic matter, the amount of P_o extracted by the respective extraction methods was much smaller than that of P_i. Especially, in the Andosol with yearly addition of manure for 28 y, the amount of extractable Po did not increase with the increase of the amount of manure applied even though the contents of total carbon, total phosphorus, and extractable P_i linearly increased. In the uncultivated high humic Andosols, on the other hand, P_o was the dominant form extracted by the Olsen and Citrate methods. In order to determine the P_o status, P_o in each extract was further hydrolyzed by phosphatases (acid phosphatase, phytase, and alkaline phosphatase), and the amount of P_i released was measured. Citrate-P_o was hydrolyzed to a certain extent (30-40% by phytase, and 12 13% by acid phosphatase), whereas Olsen-P_o was not hydrolyzed by these phosphatases. These results suggest that the chemical structure or molecular size of the P_o extracted by these methods is different. Citrate-P_o may enable to evaluate plant available P to a certain extent, which is particularly important in Andosols with a low fertility.
著者
-
Ae Noriharu
National Institute of Agro-Environmental Sciences
-
Otani Takashi
National Hospital Organization Ehime National Hospital
-
Ae Noriharu
National Institute For Agro-environmental Sciences
-
Otani T
National Institute Of Agro-environmental Sciences
関連論文
- PE-219 Visualization of the Left Ventricular Endocardial Surface by Virtual Cardioscopy Using ECG-gated Multi-slice Computed Tomography(CT/DSA-05, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- The Status and Origin of Available Nitrogen in Soils
- Nitrogen Uptake Response of Vegetable Crops to Organic Materials
- Characteristics of Extractable Soil Organic Nitrogen Determined by Using Various Chemical Solutions and Its Significance for Nitrogen Uptake by Crops
- Growth Responses of Cereal Crops to Organic Nitrogen in the Field (Plant Nutrition)
- Nutrient Distribution around Roots of Brachiaria, Maize, Sorghum, and Upland Rice in an Andisol
- Extraction of Organic Phosphorus in Andosols by Various Methods
- Genetic Variation in Acquisition, and Utilization of Phosphorus from Iron-Bound Phosphorus in Pigeonpea
- The Status of Inorganic and Organic Phosphorus in Some Soils in Relation to Plant Availability
- Genotypic Variation in Iron-, and Aluminum-Phosphate Solubilizing Activity of Pigeonpea Root Exudates under P Deficient Conditions
- Phosphorus (P) Uptake Mechanisms of Crops Grown in Soils with Low P Status : II. Significance of Organic Acids in Root Exudates of Pigeonpea
- Nitrogen Uptake Response of Crops to Organic Nitrogen
- Phosphorus (P) Uptake Mechanisms of Crops Grown in Soils with Low P Status : I. Screening of Crops for Efficient P Uptake
- 日本産コメ,コムギ,ダイズおよびアズキ中のダイオキシン類濃度とその推定摂取量
- Influence of atmospheric exposure period on the concentrations of polychlorinated dibenzo-p-dioxins, dibenzofurans and coplanar polychlorinated biphenyls (dioxins) in forage