EFFECT OF LIMING ON THE AVAILABILITY OF 3 ROCK PHOSPHATE SOURCES IN 2 WEST-AFRICAN ULTISOLS

被引：5

作者：

JUO, ASR

KANG, BT

机构：

[1] International Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan

来源：

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS | 1979年 / 10卷 / 07期

关键词：

effect of liming; Rock phosphates availability;

D O I：

10.1080/00103627909366956

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The relative effectiveness of two African rock phosphate (Morocco rock, MR and Togo rock, TR) was compared with the more reactive North Carolina rock phosphate (NCR) and with Triple superphosphate (TSP) in greenhouse using two strongly acidic Ultisols from southern Nigeria with and without application of lime. Without liming, the relative effectiveness of the four P sources is in the order of NCR>TSP>MR>TR; while with liming, the sequence becomes: TSP>NCR>MR>TR. Liming soils to pH near 5.5 depressed P uptake by plant from the rock P sources but increased P uptake from TSP. Morocco and Togo rocks are poor sources of P for direct application under both limed and unlimed conditions. © 1979, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：993 / 1003

页数：11