Kenyan Highlands versus Brazilian Cerrado Acid Soils:Chemistry, Mineralogy, and Phosphorus Sorption and Availability
We characterized the chemistry and mineralogy of selected acid soils from the maize growing areas of the Kenyan Highlands and the Cerrado Region of Central Brazil. In general, the Kenyan soils from west of the Rift Valley are similar to or slightly better than the Brazilian soils in terms of P fixation capacity and other chemical and mineralogical properties that most impact plant growth. On the other hand, the Kenyan soils east of the Rift Valley have ～3 times greater P fixation capacity and higher Al saturation than the other Kenyan soils and thus present more severe constraints on crop production. 20 μmol citrate per gram soil released ～3. 5 times more P from the Kenyan surface soils than did a 0.01 M NaCl solution alone.
Darrell G Schulze Pamela A Obura Cliff T Johnston Kiran Rana Robert Okalebo Caleb Othieno Joao Jose Marques Nilton Curi
Agronomy Department, Purdue University, West Lafayette, IN, USA Department of Soil Science, Moi University, Eldoret, Kenya Department of Soil Science, Federal University of Lavras, Lavras, Brazil
国际会议
The 7th International Symposium on Plant-Soil Interactions at Low pH(第七届低pH条件下植物-土壤交互作用国际研讨会)
广州
英文
7-8
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）