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Copy link Polysulphate Cabbage Trial in India
32
Hessaraghatta, Karnataka, India 2014
32
Key Conclusions
In this trial, the highest yield was obtained with a full dose of NPK and 75% of the S dose delivered through Polysulphate. This resulted in a 32.8% increase in the cabbage yield, compared to the non-fertilized control.
Objective
To test the efficacy of Polysulphate as a sulfur source on the performance of cabbage (Brassica oleracea var. capitata) in India.
Trial Details
Trial station
Hessaraghatta, Karnataka, India
Crop
Cabbage
Product
Standard Polysulphate
Assessments
Yield, quality, growth parameters, and nutrient uptake
Treatments
The experiment was laid out in a randomized block design with 3 replicates and included 6 treatments:
- T1: Control without S and K fertilization (100% NP only through urea, DAP)
- T2: 100% NPK (urea, DAP, Muriate of Potash (MOP))
- T3: 100% NP + 50% S through Polysulphate (10 kg S/ha) (balanced K through MOP to make 100% K)
- T4: 100% NP + 75% S through Polysulphate (15 kg S/ha) (balanced K through MOP to make 100% K)
- T5: 100% NP + 100% S through Polysulphate (20 kg S/ha) (balanced K through MOP to make 100% K)
- T6: 100% NPK (urea, DAP, MOP) + 100% S through gypsum (20 kg S/ha)
The recommended dose of fertilizers: 150 kg N/ha, 100 kg P2O5/ha, 125 kg K2O/ha and 20 kg S/ha was applied as per the treatments. Farm yard manure (FYM) was also applied at 25 t/ha in the last plough.
Treatments
The experiment was laid out in a randomized block design with 3 replicates and included 6 treatments:
- T1: Control without S and K fertilization (100% NP only through urea, DAP)
- T2: 100% NPK (urea, DAP, Muriate of Potash (MOP))
- T3: 100% NP + 50% S through Polysulphate (10 kg S/ha) (balanced K through MOP to make 100% K)
- T4: 100% NP + 75% S through Polysulphate (15 kg S/ha) (balanced K through MOP to make 100% K)
- T5: 100% NP + 100% S through Polysulphate (20 kg S/ha) (balanced K through MOP to make 100% K)
- T6: 100% NPK (urea, DAP, MOP) + 100% S through gypsum (20 kg S/ha)
The recommended dose of fertilizers: 150 kg N/ha, 100 kg P2O5/ha, 125 kg K2O/ha and 20 kg S/ha was applied as per the treatments. Farm yard manure (FYM) was also applied at 25 t/ha in the last plough.
Results
- S application significantly contributed to increased yield and quality (head diameter and compactness at harvest) of cabbage.
- S application in the form of Polysulphate, up to 75% of the recommended S dose (T4), enhanced plant growth and development, improving plant height and number of leaves.
- Highest ascorbic acid content and TSS were obtained with S application as Polysulphate, 75% of the recommended S dose (T4).
- N, K, Ca, and S uptake by cabbage crop was highest when S was applied in the form of Polysulphate, up to 75% of the recommended S dose (T4).
- The highest yield was obtained with a full dose of N-P-K and 75% S dose delivered through Polysulphate (T4), which gave rise to a 32.8% increase in the yield of cabbage, compared to the non-fertilized control (T1).
Polysulphate fertilizer increased cabbage yield by 32.8%.
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