Registro completo |
Provedor de dados: |
Chilean J. Agric. Res.
|
País: |
Chile
|
Título: |
Evaluation of fertilization with uncoated urea and 3,4-dimethylpyrazole phosphate (DMPP)-coated urea on nitrogen leaching and rose (Rosa spp.) yield
|
Autores: |
García-Castro,Alexandra
Restrepo-Díaz,Hermann
|
Data: |
2013-06-01
|
Ano: |
2013
|
Palavras-chave: |
Chlorophyll fluorescence
Leaf nitrogen concentration
Nitrate leaching
Nitrogen use efficiency
|
Resumo: |
The negative impact of N over-fertilization has acquired importance in rose (Rosa spp.) growers in Colombia. The nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) has been considered a valuable alternative to diminish the N losses by leaching and to enable more efficient N use efficiency in crops. The objective of the present work was to study the effect of DMPP on the mineral N (NH4+- N and NO3--N) content in soil and water leaching, and physiological characteristics of rose plants. A greenhouse experiment was performed for 10 wk. Four-year-old 'Charlotte' rose cultivars grafted on 'Natal Briar' were grown in soil and fertirrigated daily with a complete nutrient solution containing 170 mg N L-1. Two N fertilizers (uncoated urea [UA], and urea + 1% DMPP [UDMPP]) were used. Results showed that UDMPP did not show any advantages on dry mass accumulation, N use efficiency, leaf area, number of marketable stems, SPAD readings, chlorophyll fluorescence, and leaf N concentration. Despite all these results, the addition of the inhibitor reduced mean NO3-N concentrations in the percolated water by 65.81%. These results suggest that UDMPP could be a valuable tool to reduce NO3-- N leaching losses by retaining applied N in the ammoniacal form.
|
Tipo: |
Journal article
|
Idioma: |
Inglês
|
Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200011
|
Editor: |
Instituto de Investigaciones Agropecuarias, INIA
|
Formato: |
text/html
|
Fonte: |
Chilean journal of agricultural research v.73 n.2 2013
|
|