Pedosphere 4(2): 137--144, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Agronomic Effectiveness of Partially Acidulated Phosphate Rock |
| HE NIAN-ZU1, SUNQI-WEI1,2 |
| 1.Department of Land Science and Applied Chemistry. Zhejiang Agricultural University. Hangzhou 310029(China);2.(Zhejiang Chemical Industry Research Institute, Hang zhou 310023 (China) |
| ABSTRACT |
| Laboratorial incubation and field experiments were conducted on soils ranging in texture from sandy loam to clay and in pH from 3.6 to 9.0 to determine the agronomic effectiveness of single superphosphate (SSP), fused magnesium posphate (FMP) and partially acidulated phosphate rock (PAPR) on 8 field crops. The results showed that the pattern of available P released from SSP fixing-slowly releasing-fixing steady state was fixing -releasing-fixing-steady state, while that of PAPR was shortly And the PAPR,SSP and FMP were equally effective as uptake by plants and extractable Pin soils after crop harvesting. The PAPR used as basal fertilizer than that as top dressing, and its residual effect was also obvious. |
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| Citation: He, N. Z. and SUNQI-WEI. 1994. Agronomic Effectiveness of Partially Acidulated Phosphate Rock. Pedosphere. 4(2): 137-144. |
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