| |
| DOI: | 10.2134/agronj2008.0132 |
|---|
| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/articles/100/6/1757
Last checked: 11/02/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/aj/pdfs/100/6/1757
Last checked: 11/02/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Bélanger, Gilles;
Ziadi, Noura |
|---|
| Author Affiliation: | Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre, Quebec, Canada |
|---|
| Title: | Phosphorus and nitrogen relationships during spring growth of an aging timothy sward |
|---|
| Section: | Forages
Other records with the "Forages" Section
|
|---|
| Source: | Agronomy Journal. Vol. 100, No. 6, November/December 2008, p. 1757-1762. |
|---|
| Publishing Information: | Madison, WI: American Society of Agronomy |
|---|
| # of Pages: | 6 |
|---|
| Keywords: | TIC Keywords: Phleum pratense; Nitrogen; Phosphorus; Application rates; Spring green-up; Nutrient deficiency; Fertilization rates; Nitrogen fertilization; Nutrient balance; Age
|
|---|
| Cultivar Names: | Timothy |
|---|
| Abstract/Contents: | "Plant-based methods of determining P and N deficiencies require critical concentration values. We studied the response of timothy (Phleum pratense L.) to P and N fertilization over 7 yr with the objective of using relationships between P and N concentrations and dry matter (DM) yield to determine critical P and N concentrations. Timothy, seeded in 1998, was harvested during spring growth from 1999 to 2005 in an experiment with four sampling dates (stem elongation, early heading, late heading, and early flowering), four P applications (0, 15, 30, and 45 kg P ha-1), and four N applications (0, 60, 120, and 180 kg N ha-1). Maximum DM yield and, therefore, nonlimiting P and N conditions, were obtained with 120 kg N ha-1 without applied P. Under these nonlimiting conditions, relationships between P and N concentrations and DM yield changed with production years. Critical N concentration (Nc) in older swards (>4 yr; Nc = 37.0 X SB-0.35; R2 = 0.79), expressed as a function of shoot biomass (SB), was less than previous reports on younger swards (Nc = 48.0 X SB-0.32). Critical P concentration (Pc) was also less in older swards (Pc = 3.27 X SB-0.20; R2 = 0.68) than in younger ones (Pc = 5.23 X SB-0.40; R2 = 0.63). Critical P concentration can also be expressed as a function of N concentration (Pc = 1.07 + 0.063N; R2 = 0.71), a relationship independent of sward age and shoot biomass but affected by N deficiency; the slope is the same but intercept values vary from 1.31 to 1.41 when N limits shoot growth. Critical P and N concentrations can then be used to quantify the degree of P and N deficiency in young and old timothy swards." |
|---|
| Language: | English |
|---|
| References: | 20 |
|---|
| Note: | Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bélanger, G., and N. Ziadi. 2008. Phosphorus and nitrogen relationships during spring growth of an aging timothy sward. Agron. J. 100(6):p. 1757-1762. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=141831 |
| If there are problems with this record, send us feedback about record 141831. |
| Choices for finding the above item: |
|---|
| DOI: 10.2134/agronj2008.0132 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/articles/100/6/1757
Last checked: 11/02/2016
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/aj/pdfs/100/6/1757
Last checked: 11/02/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: b2212646a |
| 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) |
