Evaluation of fertilization with uncoated urea and 3,4-dimethylpyrazole phosphate (DMPP)-coated urea on nitrogen leaching and rose (Rosa spp.) yield
| Autor: | Alexandra García-Castro, Hermann Restrepo-Díaz |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
inorganic chemicals
chemistry.chemical_element nitrogen use efficiency lcsh:Agriculture chemistry.chemical_compound Dry weight Leaching (agriculture) Chlorophyll fluorescence lcsh:Environmental sciences lcsh:GE1-350 leaf nitrogen concentration lcsh:S food and beverages Phosphate Nitrogen Horticulture chemistry Agronomy Coated urea nitrate leaching Urea Animal Science and Zoology Nitrification Agronomy and Crop Science |
| Zdroj: | Chilean journal of agricultural research v.73 n.2 2013 SciELO Chile CONICYT Chile instacron:CONICYT Chilean journal of agricultural research, Volume: 73, Issue: 2, Pages: 154-159, Published: JUN 2013 Chilean Journal of Agricultural Research, Vol 73, Iss 2, Pp 154-159 (2013) |
| ISSN: | 0718-5839 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|