|Title:||土壤特性對於磷測定值間相關之影響||Other Titles:||Effects of Soil Composition on the Relationships between Soil Test Values for Phosphorus Fertilizer Requirements||Authors:||林家棻
|Issue Date:||5-Jun-1977||Publisher:||農業試驗所||Journal Volume:||26||Journal Issue:||2||Start page/Pages:||127-137||Source:||中華農業研究||Abstract:||
從20種土壤特性差異懸殊的中部土壤樣本與7種標準磷測定法所得測定值，經用直線及曲線複迥歸統計分析結果顯示各法所得磷測定值間之關係，可因參與土壤特性因子於其迥歸方程式中而獲得改善。在供試上壤中，受土壤特性因子影響最大者為pH, Cloy, Exch. Ca，及Extroctable Al，因而推測，若考慮土壤特性，則以上各法所得磷測定值對於檢定土壤中含磷狀況均具有同等功效。從而今後對於磷測定值之田間校正公式，似應包括有關影響土壤磷供應與作物對於磷吸取之土壤特性因子，藉可提高磷測定值的可靠性。
The purpose of this paper was to find out the effects of soil composition on the relationships between soil test values obtained by different procedures. Twenty soil samples including four categories covered a wide ranges in soil composition were taken in Central Taiwan where field trials were to be conducted. Soil P-test methods including Olsen, Bray, anion exchange resin, EDTA, water extract, Al-Abbas & Baber, and North Carolina, were selected to cover a wide range of testing procedures.
The results indicated that the correlation between the P—test values obtained by various procedures were found to be improved by allowing for the effects of soil composition, particularly with respect to pH, clay, exchangeable Ca and extractable Al. The high correlations thus obtained suggest that most of the P-test procedures will be of about equal of variation in soil composition. They also suggest that P test calibration equation should not only include the actual P-test value but also the variables representing soil factors which affecting the solubility of soil phosphorus and P-uptake of the crop.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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