| |
| DOI: | 10.21273/HORTSCI.32.4.669 |
|---|
| Web URL(s): | https://journals.ashs.org/hortsci/view/journals/hortsci/32/4/article-p669.xml
Last checked: 11/13/2019
Requires: PDF Reader |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Cabrera, Raul I. |
|---|
| Author Affiliation: | Department of Plant Science, Foran Hall, Cook College, Rutgers University, New Brunswick, NJ 08903 |
|---|
| Title: | Comparative evaluation of nitrogen release patterns from controlled-release fertilizers by nitrogen leaching analysis |
|---|
| Section: | Reports: Soil management, fertilization, & irrigation
Other records with the "Reports: Soil management, fertilization, & irrigation" Section
|
|---|
| Source: | HortScience. Vol. 32, No. 4, July 1997, p. 669-673. |
|---|
| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
|---|
| # of Pages: | 5 |
|---|
| Keywords: | TIC Keywords: Fertilizer evaluation; Temperature response; Controlled release fertilizers; Nitrogen fertilizers; Leaching; Temperatures; Controlled-release nitrogen; Topdressing; Nitrates
|
|---|
| Abstract/Contents: | "Seven nursery grade (8-9 month duration), polymer-coated, controlled-release fertilizers (CRF) were topdressed or incorporated into a 2 peat: 1 vermiculite: 1 sand (by volume) medium to yield the same amount of N per container. The pots (0.5 L) were uniformly irrigated with DI water every week to produce a target leaching fraction of 25%. Leachate N contents (ammonium plus nitrate), employed as indicators of N release, allowed for comparison of CRF perfomances as a function of temperature changes over a season. Two distinct N leaching (i.e. release) patterns were observed over the 180-day experimental period. The fertilizers Osmocote 18-6-12 FS (Fast Start: OSM-FS), Porkote Plus 20-3-10 (PROK), Osmocote 24-4-8HN (High N: OSM-HN) and Polyon 25-4-12 (POLY) exhibited a N leaching pattern that closely followed changes in average daily ambient temperatures (Tā^D]v^D]g) over the season. This relationship was curvilinear, with N leaching rates per pot (NLR) being highly reponsive to Tā^D[v^D[g changes between 20 and 25Ā°C. Temperatures above 25Ā°C produced an average minimum NLR of 1.27 mgĀ·dā»Ā¹ for these fertilizers. OSM-FS, PROK, and OSM-HN had the highest cumulative N losses over the experimental period. In contrast, the CRF group formed by Nutricote 18-6-8 (270: NUTR), Woodace 20-4-12 (WDC), and Osmocote 18-6-12 (OSM) showed a more stable N leaching pattern over a wider range of temperatures, with rates about 30% to 40% lower than those in the temperature-responsive CRF, and averaging a maximum NLR of 0.79 mgĀ·dā»Ā¹ for Tā^D[v^D[g >25Ā°C. NUTR and WDC had the lowest cumulative N losses over the season. Soluble salt readings paralleled N leaching for each CRF, indicating similar leaching patterns for other nutrients. Incorporation produced significantly higher cumulative N losses than topdressing, but without effect on the actual N leaching pattern over the season. Regardless of the N formulation in the CRF, over 85% of the N recovered in the leachates was in the nitrate form." |
|---|
| Language: | English |
|---|
| References: | 25 |
|---|
| Note: | Figures
Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cabrera, R. I. 1997. Comparative evaluation of nitrogen release patterns from controlled-release fertilizers by nitrogen leaching analysis. HortScience. 32(4):p. 669-673. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=40299 |
| If there are problems with this record, send us feedback about record 40299. |
| Choices for finding the above item: |
|---|
| DOI: 10.21273/HORTSCI.32.4.669 |
| Web URL(s):
https://journals.ashs.org/hortsci/view/journals/hortsci/32/4/article-p669.xml
Last checked: 11/13/2019
Requires: PDF Reader |
| 
MSU catalog number: SB 1 .H64 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
