Quantitative and qualitative responses of an established Kentucky bluegrass (<i>Poa pratensis</i> L.) turf to N, P, and K additions

Badra, Abdo; Parent, Léon-Etierine; Desjardins, Yves; Allard, G.; Tremblay, Nicolas

doi:10.4141/p03-125

Cited by 9 publications

(19 citation statements)

References 15 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, N addition led to higher P and K uptake relative to the other nutrients. These results are in agreement with N requirements for high turfgrass aesthetical values at the same sites as found by Badra et al (2005).…”

Section: Effect Of N P and K Additions On Nutrient Statussupporting

confidence: 92%

“…In this same experiment, Badra et al (2005) found that Kentucky bluegrass turf showed low-to high-quality stands and responded quadratically or cubically to N additions for visual shoot density and foliage colour ratings. The lower boundary of 25.1 g N kg -1 for the N concentration range in Mills and Benton Jones (1996) was significantly lower than 28.5 or 28.8 g N kg -1 (t = 2.91 or 3.16, P < 0.01) obtained in the present study (Table 4).…”

Section: Effect Of N P and K Additions On Nutrient Statusmentioning

confidence: 88%

“…The experimental sites and procedures were presented in a previous publication (Badra et al 2005). Briefly, two sites were established in 1991 and 1992 on the Agriculture and Agri-Food Canada research station at L'Acadie (Quebec), 30 km south east of Montreal (45°17′ 45″ N, 73°21′ 00″ W).…”

Section: Experimental Sitementioning

confidence: 99%

“…Hence, the equation relating them must show a slope close to one for an intercept of one visual rating unit. Statistics on visual ratings and clipping yields were presented in Badra et al (2005). (Morin 1993).…”

Section: Experimental Sitementioning

confidence: 99%

“…Nutrient correlations with N were present in the second and the fourth PCs. Badra et al (2005) found that N was the driving nutrient in determining the aesthetical value of Kentucky bluegrass For personal use only.…”

Section: Degree Of Inter-correlation Among Nutrients Through Principamentioning

confidence: 99%

See 4 more Smart Citations

Effect of leaf nitrogen concentration versus CND nutritional balance on shoot density and foliage colour of an established Kentucky bluegrass (Poa pratensis L.) turf

Badra¹,

Parent²,

Allard³

et al. 2006

Can. J. Plant Sci.

Self Cite

View full text Add to dashboard Cite

N. 2006. Effects of leaf nitrogen concentration versus CND nutritional balance on shoot density and foliage colour of an established Kentucky bluegrass (Poa pratensis L.) turf. Can. J. Plant Sci. 86: 1107-1118. A 3-yr field study was conducted in a loam site and a sand site to determine the effects of N, P, and K application rates on N status, shoot density and foliage colour of Kentucky bluegrass clippings and to derive critical N values. The experiment was arranged in a completely randomized block design with four replicates and three nutrients, N (0 or 50 to 300 kg ha -1 yr -1 ), P (0 or 21.8 to 87.3 kg P ha -1 yr -1 ), and K (0 or 41.7 to 250 kg K ha -1 yr -1 ), equally broadcast six times per growing season. We examined N concentration values, log-transformed N concentration values, and CND values for compositional nutrient simplexes comprising one (V N1 ), three (V N3 ), five (V N5 ), or 11 (V N11 ) macro-and micro-nutrients. Critical values for N expressions were obtained from linear relationships with targeted visual shoot density and foliage colour ratings that were closely related to each other (R 2 = 0.92). The highest coefficients of determination (0.975 to 0.980) were obtained with V N5 and V N11 . The V N5 values were consistent with literature data and across experimental sites, and were the most successful (99% success) in diagnosing N sufficiency in 328 qualified specimens from commercial sod farms. Compared with raw concentrations, the CND transformation reduced from 0.6 to 0.1 the degree of inter-correlation among nutrients in principal component analysis and was amenable to a χ 2 distribution of CND indices. Using a critical imbalance index (CNDr 2 ) of 5.6 as χ 2 value, and a critical CND I N 2 index of 1.5 for a 5-nutrient simplex, we diagnosed as imbalanced 179 qualified specimens of which 110 specimens presented excessively high N level among the 328 qualified specimens in commercial stands. The proposed five-nutrient CND norms proved to be effective in diagnosing N status in Kentucky bluegrass clippings across experimental, literature, and survey data sets. To whom correspondence should be addressed (leon-etienne.parent@sga.ulaval.ca).

show abstract

Section: Effect Of N P and K Additions On Nutrient Statussupporting

confidence: 92%

Section: Effect Of N P and K Additions On Nutrient Statusmentioning

confidence: 88%

Section: Experimental Sitementioning

confidence: 99%

Section: Experimental Sitementioning

confidence: 99%

Section: Degree Of Inter-correlation Among Nutrients Through Principamentioning

confidence: 99%

See 3 more Smart Citations

Effect of leaf nitrogen concentration versus CND nutritional balance on shoot density and foliage colour of an established Kentucky bluegrass (Poa pratensis L.) turf

Badra¹,

Parent²,

Allard³

et al. 2006

Can. J. Plant Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

Reducing nitrate leaching losses from turfgrass fertilization of residential lawns

Côté

Grégoire

2021

J of Env Quality

View full text Add to dashboard Cite

Fertilizer applications on lawns have raised environmental concerns in many Canadian municipalities. In this greenhouse study, NO3–N leaching losses from Kentucky bluegrass (Poa pratensis L.) lawns were evaluated on two soils (a schist loam and a clay loam) and on a sand/peat moss rootzone mix (80% sand, 20% peat moss). Eight different fertilizer N sources (urea, Polyon 8 and 12‐wk release, Duration 45 and 90‐d release, XCU, corn gluten meal, and UFLEXX) were assessed at five application rates (25–200 kg N ha–1 yr–1) and two application frequencies over two 8‐wk trials. Average NO3–N concentration in leachate were measured at levels of 3.5, 7.4, and 1.4 mg L–1 from turf grown in loam, clay, and sand respectively, but losses from loam and clay were mostly affected by N mineralization from organic matter. Turf fertilized with rates ≥100 kg N ha–1 generally resulted in acceptable visual quality on both soils, but coated‐urea fertilizers were more efficient to reduce leaching. In sand, UFLEXX and urea (150 and 200 kg N ha–1) as well as XCU (200 kg N ha–1) resulted in higher NO3–N losses, varying from 8.5 to 23.7 mg L–1, and losses from other N sources were consistently below 3 mg L–1. Our results show that it is possible to maintain good quality turfgrass while keeping low NO3–N leaching losses (i.e., <4 mg L–1) in loam, clay, and sand by selecting the ideal combination of N source, N rate, and application frequency.

show abstract

Establishment and Maintenance During Establishment of Hybrid Bluegrass (P. arachnifera Torr. × P. pratensis L.) in the Transition Zone

Teuton¹,

Sorochan²,

Main³

et al. 2009

horts

View full text Add to dashboard Cite

The transition zone is one of the hardest places to maintain high-quality turfgrasses, and the overall research objective was to determine best management practices to establish new turf cultivars in this zone. Hybrid bluegrasses (P. arachnifera Torr. × P. pratensis L.) have been bred for heat and drought tolerance and may offer a new alternative to other turfgrasses. The specific cultivars examined in this research were ‘Thermal Blue®’ and ‘Dura Blue®’. Experiments were conducted during 2003, 2004, and 2005 in Knoxville, TN. ‘Thermal Blue’ was seeded at 50, 100, 150, 200, and 250 kg·ha−1 of seed. ‘Thermal Blue's’ ideal seeding rate was between 100 and 150 kg·ha−1 of seed in 2003 and 50 kg·ha−1 in 2004. ‘Thermal Blue’ was also seeded in January, April, July, and September of each year with 100 kg·ha−1 of seed. All seeding dates took ≈11 months to become well established. However, July seeding produced poor turf quality (less than 6) and was the only seeding date deemed unacceptable. ‘Thermal Blue’ and ‘Dura Blue’ were fertilized with ammonium nitrate at 100, 200, and 300 kg N/ha/year and urea formaldehyde at 200 and 300 kg N/ha/year starting in March of each year. These treatments were maintained at 2-, 3.5-, and 5-cm mowing heights. ‘Thermal Blue’ had higher quality evaluations and produced more clippings than ‘Dura Blue’ throughout the year. Higher fertility regimens increased quality evaluations in April but decreased quality evaluations in October. Increasing the mowing height improved turf quality and decreased biomass production for both grasses. A proposed optimum method for establishment included seeding ‘Thermal Blue’ in April at 150 kg·ha−1 and fertilizing with 300 kg·ha−1 of nitrogen and them mowing at 5-cm height. ‘Thermal Blue’ and ‘Dura Blue’ are adapted for the transition zone, but summer heat stress may cause turf quality decrease in the fall.

show abstract

Quantitative and qualitative responses of an established Kentucky bluegrass (Poa pratensis L.) turf to N, P, and K additions

Cited by 9 publications

References 15 publications

Effect of leaf nitrogen concentration versus CND nutritional balance on shoot density and foliage colour of an established Kentucky bluegrass (Poa pratensis L.) turf

Effect of leaf nitrogen concentration versus CND nutritional balance on shoot density and foliage colour of an established Kentucky bluegrass (Poa pratensis L.) turf

Reducing nitrate leaching losses from turfgrass fertilization of residential lawns

Establishment and Maintenance During Establishment of Hybrid Bluegrass (P. arachnifera Torr. × P. pratensis L.) in the Transition Zone

Contact Info

Product

Resources

About