Soil phosphorus dynamics as affected by Congo grass and P fertilizer
Some plant species can change soil phosphorus (P) availability and this may be an important tool in managing tropical high fixing phosphorus soils. An experiment was conducted to evaluate phosphorus transformations in the soil and phosphatase activity during periods of Congo grass (Brachiaria ruzizi...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2014-08-01
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| Series: | Scientia Agricola |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400008&lng=en&tlng=en |
| _version_ | 1819107462890913792 |
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| author | Ciro Antonio Rosolem Alexandre Merlin Júlio Cesar Longo Bull |
| author_facet | Ciro Antonio Rosolem Alexandre Merlin Júlio Cesar Longo Bull |
| author_sort | Ciro Antonio Rosolem |
| collection | DOAJ |
| description | Some plant species can change soil phosphorus (P) availability and this may be an important tool in managing tropical high fixing phosphorus soils. An experiment was conducted to evaluate phosphorus transformations in the soil and phosphatase activity during periods of Congo grass (Brachiaria ruziziensis, Germain et Evrard) growth in two tropical soils receiving 20, 40, 80, 160 mg dm-3 of inorganic P. Plants were grown for 84 days in 8-L pots. Acid phosphatase activity, P in the microbial mass, soil organic and inorganic P and P accumulation by Congo grass were evaluated. Phosphorus fertilization increased soil P availability, Congo grass yields and P accumulation in the plant. On average, less labile P forms in the soil were not changed by Congo grass; however, the P in the soil extracted with HCl (P-Ca - non labil form) decreased. This decrease may have resulted from the combination of the presence of grass and phosphatase capacity to dissolve less available P in the soil. Thus, soil exploration by Congo grass roots and the subsequent extraction of calcium phosphate may have increased the P concentration in the plant tissue. Despite the decrease in the P extracted from the soil with HCl resulting in increased labile P forms in the soil, the effect of Congo grass on the availability of P depends on the soil type. |
| first_indexed | 2024-12-22T02:54:26Z |
| format | Article |
| id | doaj.art-6459f4d5d1ef4b958c23fdc049d818d9 |
| institution | Directory Open Access Journal |
| issn | 1678-992X |
| language | English |
| last_indexed | 2024-12-22T02:54:26Z |
| publishDate | 2014-08-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Scientia Agricola |
| spelling | doaj.art-6459f4d5d1ef4b958c23fdc049d818d92022-12-21T18:41:19ZengUniversidade de São PauloScientia Agricola1678-992X2014-08-0171430931510.1590/0103-9016-2013-0345S0103-90162014000400008Soil phosphorus dynamics as affected by Congo grass and P fertilizerCiro Antonio Rosolem0Alexandre Merlin1Júlio Cesar Longo Bull2Universidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Estadual PaulistaSome plant species can change soil phosphorus (P) availability and this may be an important tool in managing tropical high fixing phosphorus soils. An experiment was conducted to evaluate phosphorus transformations in the soil and phosphatase activity during periods of Congo grass (Brachiaria ruziziensis, Germain et Evrard) growth in two tropical soils receiving 20, 40, 80, 160 mg dm-3 of inorganic P. Plants were grown for 84 days in 8-L pots. Acid phosphatase activity, P in the microbial mass, soil organic and inorganic P and P accumulation by Congo grass were evaluated. Phosphorus fertilization increased soil P availability, Congo grass yields and P accumulation in the plant. On average, less labile P forms in the soil were not changed by Congo grass; however, the P in the soil extracted with HCl (P-Ca - non labil form) decreased. This decrease may have resulted from the combination of the presence of grass and phosphatase capacity to dissolve less available P in the soil. Thus, soil exploration by Congo grass roots and the subsequent extraction of calcium phosphate may have increased the P concentration in the plant tissue. Despite the decrease in the P extracted from the soil with HCl resulting in increased labile P forms in the soil, the effect of Congo grass on the availability of P depends on the soil type.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400008&lng=en&tlng=enphosphatasesoil fertilitycrop rotationbrachiaria |
| spellingShingle | Ciro Antonio Rosolem Alexandre Merlin Júlio Cesar Longo Bull Soil phosphorus dynamics as affected by Congo grass and P fertilizer Scientia Agricola phosphatase soil fertility crop rotation brachiaria |
| title | Soil phosphorus dynamics as affected by Congo grass and P fertilizer |
| title_full | Soil phosphorus dynamics as affected by Congo grass and P fertilizer |
| title_fullStr | Soil phosphorus dynamics as affected by Congo grass and P fertilizer |
| title_full_unstemmed | Soil phosphorus dynamics as affected by Congo grass and P fertilizer |
| title_short | Soil phosphorus dynamics as affected by Congo grass and P fertilizer |
| title_sort | soil phosphorus dynamics as affected by congo grass and p fertilizer |
| topic | phosphatase soil fertility crop rotation brachiaria |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400008&lng=en&tlng=en |
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