Data/hora: 10/06/2024 02:12:16

Provedor de dados: | 18
País: | United Kingdom
Título: | Linking manure properties to phosphorus solubility in calcareous soils: Importance of the manure carbon to phosphorus ratio
Autores: | Leytem, A.B.; Turner, B.L.; Raboy, V.; Peterson, K.L.
Data: | 2005
Ano: | 2005
Palavras-chave: | Chemistry; Calcareous soil; Phosphorous; Mass Import - autoclassified (may be erroneous).
Resumo: | Land application of manure can increase P transfer in runoff,  although the risk depends in part on the characteristics of the manure.  We assessed this for calcareous soils using manures from swine (Sus  domesticus) fed one of five barley varieties (Hordeum vulgare L.),  including four low phytate mutants and a normal variety, to produce  manures with a range of total P (6.8-4.9 g P water-soluble P  (4.3-8.0 g P kg-'), total N/P ratios (2.5:1-5.5:1), and total C/P ratios  (31:1-67:1). Two experiments were conducted. First, manures were  incorporated into three soils on a N (150 mg N kg-' soil) or P (27.5 mg  P kg-1 soil) basis three times during a 7-wk incubation. Second, 10  additional soils were incubated for 2 wk following a single P-based  manure application (82.5 mg P kg-i soil). Water and NaHCO3 (Olsen)  extractable P were determined at regular intervals, with microbial  P determined by fumigation-extraction after each incubation. For  N-based application (i.e., variable P amendment), extractable P increased  with total P applied. For P-based applications, the increase  in soil P was more closely correlated to microbial P concentration than  manure P composition or soil properties. These results suggest that  stimulation of the microbial biomass by added organic C is important  in determining soil P solubility following manure application.
Tipo: | Article
Idioma: | Inglês

Identificador:

http://eprints.nwisrl.ars.usda.gov/17/1/1164.pdf

Leytem, A.B. and Turner, B.L. and Raboy, V. and Peterson, K.L.  (2005) Linking manure properties to phosphorus solubility in calcareous soils: Importance of the manure carbon to phosphorus ratio.   Soil Science Society of America Journal.     69:1516-1524.

Relação:

http://eprints.nwisrl.ars.usda.gov/17/

1164

Formato: | application/pdf