Cabbage Trial with Puraloop® in Israel

Puraloop® proved as efficient source of phosphorus as conventional P fertilizers

Northern Agriculture R&D, Israel
2022

Key Conclusions

  • Plants responded to P fertilization, with a significant difference between the –P and +P treatments.
  • No significant differences were found between Puraloop and TSP, which shows that Puraloop is as efficient as conventional P fertilizers.

Objective

To evaluate the performance of Puraloop as a source of phosphorus for cabbage using a pot trial.

Trial Details

Trial station

Northern Agriculture R&D, Israel

Crop

Cabbage

Assessments

Yield (g/pot), P uptake (%)

Treatments

For this trial, cabbage was planted in a randomized block design (RBD) experiment set up with 6 blocks.
Each repetition consisted of 5 pots with a 3L volume. The treatments consisted of a negative control (zero P), TSP, and Puraloop. Both TSP and Puraloop treatments received 460 mg P2O5/pot.

Other nutrients were applied in sufficient amounts via fertigation.

Treatments

For this trial, cabbage was planted in a randomized block design (RBD) experiment set up with 6 blocks.
Each repetition consisted of 5 pots with a 3L volume. The treatments consisted of a negative control (zero P), TSP, and Puraloop. Both TSP and Puraloop treatments received 460 mg P2O5/pot.

Other nutrients were applied in sufficient amounts via fertigation.

Results

Fresh biomass (g)

Both treatments with P fertilizers produced a significantly higher amount of fresh biomass (measured in grams) compared to pots with zero P.

Bar chart showing fresh mass of plants under different fertiliser treatments in a trial of Puraloop. The bars indicate the control (no P) treatment had the lowest fresh mass, while the Puraloop-treatment achieved a fresh mass comparable to the conventional P-fertiliser treatment.

Fresh biomass (in grams)

 

P uptake (%)

No significant differences were found between the variant fertilized with Puraloop and the variant fertilized with conventional triple superphosphate (TSP).

Bar chart showing the effect of phosphorus treatments on plant fresh mass. Three bars represent Zero P, TSP, and Puraloop treatments. The Zero P bar is the lowest at around 0.09 kg, while TSP and Puraloop are higher and nearly equal at around 0.15 kg, both marked with the same statistical letter ‘a’, indicating no significant difference between them, while Zero P is labeled ‘b’.

P uptake (in %)

 

Puraloop is a recycled phosphate fertilizer derived from organic waste streams and designed for sustainable food production. This trial on cabbage (Brassica oleracea var. capitata) showed it can deliver similar results as other conventional sources of phosphorus.

 

Three potted cabbage seedlings showing growth differences under phosphorus treatments. The Zero P plant appears smallest with lighter leaves, the TSP plant is larger with broader leaves, and the Puraloop plant shows similar healthy growth and leaf size to the TSP plant.

Trial pots with cabbage plants.

 

Puraloop is a registered trademark owned by ICL Europe Cooperatif UA