Golf green establishment trial

Trial designed to compare different fertilisers for the establishment of creeping bentgrass on USGA rootzone.

NIBIO institute

Key Conclusions

  • Sierrablen Plus Pearl Renovator 11-11-5 provided significantly improved turf establishment up to week 6 over other fertiliser options.
  • The use of Sierrablen Plus Pearl Renovator 11-11-5 significantly reduced Nitrogen leaching between weeks 3-12 and showed a reduced trend in P leaching, indicating improved nutrient efficiency.

Trial Details

Trial station

NIBIO institute

Product

Renovator with Pearl Technology

Assessments

% cover, turf quality, colour and density were made for 12 weeks

Treatments

A randomised and replicated (x3) field trial conducted independently by NIBIO, Landvik, Norway, examined 5 granular fertiliser options for establishment of Agrostis stolonifera surface over a USGA rootzone. The trial area had lysimeters in place to collect drainage water and measure nutrients leached. The trial started in June 2020 and assessments of % cover, turf quality, colour and density were made for 12 weeks, by which time the surface was fully established. Growing conditions were good, with average soil temperatures above 17°C, however rainfall was nearly double the 30-year average for June and July. Drainage water was collected through the trial and N & P measured.

Trial overview at week 3. Treatments labelled

 

Treatments

A randomised and replicated (x3) field trial conducted independently by NIBIO, Landvik, Norway, examined 5 granular fertiliser options for establishment of Agrostis stolonifera surface over a USGA rootzone. The trial area had lysimeters in place to collect drainage water and measure nutrients leached. The trial started in June 2020 and assessments of % cover, turf quality, colour and density were made for 12 weeks, by which time the surface was fully established. Growing conditions were good, with average soil temperatures above 17°C, however rainfall was nearly double the 30-year average for June and July. Drainage water was collected through the trial and N & P measured.

Trial overview at week 3. Treatments labelled

 

Results

1. Turf coverage progression was significantly greater for Sierrablen Plus Pearl Renovator, up to week 6 (Image 1: week 3, Image 2: week 5). Turf quality was significantly greater from week 4 to week 6 after sowing (Table 2). Higher than average rainfall potentially meant that initial granular applications of conventional nutrition were leached from the high sand-based rootzone.

Table 2. Key trial results (n=3), Means which do not share a letter are significantly different (P<0.01)

 

2. Drainage water analysis demonstrated significantly reduced N leaching from Sierrablen Plus Pearl treatments (Table 3), and also a lower trend of P leaching. The combination of CRF Nitrogen and Pearl ‘root-activated’ phosphorus reduced leaching of nutrients into drainage water in comparison to other technology fertilisers. Making this a nutrient efficient approach for turf establishment.

 

Table 3. Mean total N & P analysed in drainage water (n=3). Means which do not share a letter are significantly different (P<0.01)

 

Trial overview at week 5. Treatments labelled