Distribution of Phosphorus in Minjingu Phosphate Rock and Ikutha Rock Samples
Distribution of Phosphorus in Minjingu Phosphate Rock and Ikutha Rock Samples
摘要
Minjingu Phosphate Rock （MPR） from Northern Tanzania and the Ikutha Phosphate Rock （IPR） found in Central-Southeast Kenya are well documented as potential sources of phosphorous （P） available in East Africa. On-farm trials in phosphate-deficient soils in Western Kenya demonstrated MPR to be as effective as triple superphosphate （TSP） - 20% P, at equal P rates. The aim of this work is to determine the distribution of phosphorus in these phosphate rocks （PRs）. The different phosphorus fractions were extracted using the modified Williams extraction procedure and analysis carried on a UV/VIS spectrometer （SHIMADZU UV-220-02 and NOVASPEC II）. The analysis showed that the most abundant form of phosphorus in the phosphate rocks was the Inorganic Phosphorus （IP） contributing 74.20% of total phosphorus （TP） for Minjingu, and 83,28% of total phosphorus for Ikutha phosphate rock.
参考文献20
-
1P. Pardo, S.J.F. L6pez, G. Rauret, V. Ruban, H. Muntau, P.H. Quevauviller, Study of the stability of extractable phosphate content in a candidate reference material using a modified Williams extraction procedure, Analyst 124 (1999) 40%411.
-
2P.A. Sanchez, Properties and management of soils in the tropics, J Wiley & Sons, New York, USA, 1976.
-
3S.S.S. Rajan, J.H. Watkinson, A.G. Sinclair, Phosphate rocks for direct application to soils, Adv. Agr. 57 (1996) 77-159.
-
4P. Van Straaten, Rocks for Crops: Agrominerals of Sub-Saharan Africa, ICRAF, Nairobi, Kenya, 2002, p. 338.
-
5T. Schlueter, Geology of East Africa, Gebrueder Borntraeger, Berlin-Stuttgart, 1997, p. 484.
-
6B. Jama, P. van Straaten, Potential of East African phosphate rock deposits in integrated nutrient management strategies, An Acad Bras Cienc (4) (2006) 78.
-
7R.J. Buresh, P.C. Smithson, D.T. Hellums, Building soil phosphorus capital in Africa, R. Buresh, P. Sanchez, F. Calhoun (Eds.), Replenishing soil fertility in Africa, Soil Sci. Soc. Amer. Special Pub. 51(1997) 111-149.
-
8A.R. Bromfield, I.R. Hancock, D.F. Debenham, Effects of ground PR and elemental S on yield and P uptake of maize in Western Kenya, Exp. Agric. 17 (1981) 383-387.
-
9P.K. Mutuo, P.C. Smithson, R.J. Buresh, R.J. Okalebo, Comparison of phosphate rock and triple superphosphate of a phosphorus deficient Kenyan soil. Comm, Soil Sci. Plant Anal. 30 (1999) 1091- 1103.
-
10S.M. Obaga, J.S. Ademba, P. Tana, A. Ondicho, Minjingu Rock Phosphate for Soil Fertility Improvement and Increased Crop Yields in Southwest Kenya, KARI Booklet, 2005.
-
1化肥搭配有机肥施用好处多[J].江西棉花,2011,33(2):40-40.
-
2Tapan Adhikari Samaresh Kundu Anangi Subba Rao.Microbial Solubilization of Phosphorus from Nano Rock Phosphate[J].Journal of Agricultural Science and Technology(A),2014,4(6):468-474.
-
3戴维·A·瓦卡里（David,A．Vaccari）,韩雪梅（翻译）,曹志平（审校）.磷：逼近枯竭线[J].环球科学,2009(7):80-85.
-
4EklouA．Somado,雷波.豆科植物与磷岩对西非水稻的共同效应[J].国外作物育种,2004,23(1):5-5.
-
5全球磷、硫、钾资源状况[J].化工矿物与加工,2008(3):40-40.
-
6中国磷矿石资源丰而不富[J].中国粉体工业,2011(6):52-52.
-
7邹茗.土壤中磷肥化学形态变化对磷肥有效性的影响[J].四川农业科技,2005(6):36-36. 被引量：1
-
8周建青,徐爱列,王国锋.不同测定方法测定小蓟中绿原酸含量的研究[J].安徽农业科学,2009,37(27):12902-12903. 被引量：4
-
9刘元忠.化肥与有机肥混用有何好处[J].农业知识,2004,0(1):37-37.
-
10世界磷矿供需趋紧价格上升[J].化工矿物与加工,2008,37(4):42-43.
