EXPLORATORY METHOD FOR FRACTIONATION OF ORGANIC PHOSPHORUS FROM GRASSLAND SOILS
EXPLORATORY METHOD FOR FRACTIONATION OF ORGANIC PHOSPHORUS FROM GRASSLAND SOILS
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DOI：
10.1097/00010694-197802000-00006
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发表时间：
1978-01-01
期刊：
影响因子：
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通讯作者：
COLE, CV
中科院分区：
文献类型：
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作者：
BOWMAN, RA;COLE, CV
草地土壤中的磷很大一部分是有机磷。在NaHCO 3提取的P低于足够的水平，植物必须依赖于矿化的有机P的性质，转换和相对大小的有机P池5北美草原土壤。四个这样的游泳池进行了评估：一个不稳定的游泳池，用0.5 M NaHCO 3（pH 8.5）提取;一个中度不稳定的游泳池，由酸溶性有机磷和碱溶性无机磷;一个中度耐馏分（富里酸P）;和一个高度耐馏分（腐殖酸P）。在不稳定、中等不稳定、中等抗性和高抗性组分中，有机磷从提取物中的回收率分别为7%、34%、47%和12%。植酸中的P在酸或碱提取中均不能回收，但RNA在不稳定组分中回收。
A high percentage of the P in grassland soils is organic. Where the NaHCO3- extractable P is below the adequate level, plants must rely on mineralization of organic P. The nature, transformations and relative sizes of the organic P pools for 5 North American grassland soils were shown. Four such pools were evaluated: a labile pool, extracted with 0.5 M NaHCO3 (pH 8.5); a moderately labile pool, consisting of acid-soluble organic P and alkali-soluble inorganic P; a moderately resistant fraction (fulvic-acid P); and a highly resistant fraction (humic-acid P). Recovery of organic P from the extracts averaged 7, 34, 47 and 12% in the labile, moderately labile, moderately resistant and highly resistant fractions, respectively. The P in phytic acid was not recoverable in either acid or alkali extractions, although RNA was recovered ine labile fraction.