CALCINED CHRISTMAS ISLAND C-GRADE ROCK PHOSPHATE FERTILIZERS - MINERALOGICAL PROPERTIES, REVERSION AND ASSESSMENT BY CHEMICAL-EXTRACTION

被引：27

作者：

GILKES, RJ ^{[1
]}

PALMER, B ^{[1
]}

机构：

[1] UNIV WESTERN AUSTRALIA, DEPT SOIL SCI & PLANT NUTR, NEDLANDS 6009, W AUSTRALIA, AUSTRALIA

来源：

AUSTRALIAN JOURNAL OF SOIL RESEARCH | 1979年 / 17卷 / 03期

关键词：

D O I：

10.1071/SR9790467

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Calcination of Christmas Island C-grade ore at temperatures up to 1050.degree. C produces P fertilizers that differ greatly in effectiveness as determined by citrate extraction and plant growth. Maximum effectiveness is obtained by calcination at temperatures between 500.degree. and 650.degree. C, and is best predicted by extractions of between 1 and 3 h duration in neutral ammonium citrate. Alkaline ammonium citrate and citric acid are poorer indicators of phosphorus availability. The mineralogical and chemical properties of the calcines may be used to explain variations in amounts of citrate soluble P for different temperatures of calcination. Incubation of moist 500.degree. C calcined C-grade ore induces recrystallization (i.e., reversion) of some crandallite, resulting in a decrease in the solubility of P in neutral ammonium citrate and its availability to plants.

引用

页码：467 / 481

页数：15

共 18 条

[1]

A.O.A.C, 1975, Official methods of analysis of the Association of Official Analytical Chemists, P564

[2]

BLANCHARD FN, 1972, AM MINERAL, V57, P473

[3]

BLANCHARD FN, 1971, Q J FLORIDA ACAD SCI, V34, P1

[4]

BOXMA R, 1977, NETH J AGR SCI, V25, P42

[5] AGRONOMIC USE OF CALCINED CHRISTMAS-ISLAND IRON-ALUMINIUM PHOSPHATES .2. POT TRIALS [J].

BUCHAN, JAJ ;

MULLER, FB ;

ROGERS, J ;

SEAGER, RH ;

YONG, TA .

NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH, 1970, 13 (03) :465-&

[6]

COWGILL UM, 1963, AM MINERAL, V48, P1144

[7]

DOAK B. W., 1965, NEW ZEAL J AGR RES, V8, P15

[8]

HILL WL, 1950, T AM I MIN MET ENG, V187, P699

[9]

JACOB KD, 1936, J AOAC, V19, P449

[10] The effect of moisture on the availability of dehydrated phosphate of alumina [J].

Morse, FW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1903, 25 (03) :280-288

← 1 2 →