CHANGES OF pH AND AVAILABLE PHOSPHORUS AND CALCIUM IN RHIZOSPHERE OF ALUMINUM-TOLERANT MAIZE GERMPLASM FERTILIZED WITH PHOSPHATE ROCK
作者： Ricardo Ramirez , Shirley M. Fernandez , Jon I. Lizaso
关键词:
摘要: Availability of phosphorus (P) and calcium (Ca) is a common constraint in tropical acidic soils limiting the potential those for crop production. Under such conditions, phosphate rock (PR) could become cheap source P Ca crops. The dissolution PR, however, slow process that has limited its use annual crops requiring ready-available nutrients. This study was conducted to examine effect aluminum-tolerant maize genotypes on rhizosphere pH consequent release from PR. Six inbreds CIMMYT one local program FONAIAP-CENIAP were used. Sources Riecito PR commercial triple super (TSP), applied at dose 400 mg kg1. Individual pregerminated seeds placed small glass boxes 16×14×1 Cm filled with 200 g plinthic paleustult soil, 4.4 very low Ca. Where applied, increased between 0.14 0.38 units as consequence incr...
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