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Synergistic Effect of Polyaspartic Acid on Hydroponic Nutrient Solution

In order to regulate the slow and controlled release of nutrient elements in the nutrient solution, improve the fertilizer efficiency of the plant nutrient solution, increase the yield of hydroponic crops, and reduce the cost of hydroponic cultivation.

The test team added a new type of fertilizer synergist polyaspartic acid to the plant nutrient solution, and observe the effect of adding PASP in plant nutrient solution on the growth and development of hydroponic crops.

Polyaspartic Acid pakchoi and celery

In the experiment, the common horticultural formula balanced nutrient solution was used as the CK group, and the nutrient solution hydroponic experiment with different additions of PASP was carried out on pakchoi and celery.

The results showed that the addition of PASP in nutrient solution could significantly promote the accumulation of nutrients in Chinese cabbage and celery, and could well reduce the content of nitrate in hydroponic vegetables.


The dry weight of single plant of hydroponic pakchoi increased by 9.51% in 30 days, the nitrate content decreased by 50.93% compared with the CK group, and the Vc content was 1.86 times that of the CK group.

The wet weight of celery plants increased by 45.07%, the dry weight of each plant increased by 46.29%, the nitrate content decreased by 29.94% compared with the CK group, and the Vc content was 1.27 times that of the CK group.

Conclusion of Polyaspartic Acid

1. Adding PASP in the plant nutrient solution can achieve the effects of slow-release and synergistic effect of nutrient elements, long-term effect, and crop yield increase.

PASP can chelate and activate nutrient ions in the nutrient solution, release them slowly and controlledly, improve the utilization rate of nutrient ions by crops and the long-term effect of nutrient elements, and then promote the synthesis and accumulation of organic matter in crops to achieve the effect of increasing production.

2. Adding PASP to plant nutrient solution can significantly reduce the accumulation of nitrate in hydroponic crops and improve crop quality.

As an amino acid, ASP obtained from PASP hydrolysis can not only supplement the organic nitrogen of crops, but also inhibit the absorption and utilization of nitrate nitrogen by crops, thereby reducing the accumulation of nitrate in crops and improving crop quality.
At the same time, PASP can change the ratio of ammonium to nitrate in the nutrient solution, and also has a certain influence on the Vc content of crops.

3. 1.5% is a suitable addition of PASP

When the addition of PASP was 1.5%, the morphological and nutritional indicators of pakchoi and celery were basically optimal, and the plants were tall, with the well-developed root system, high photosynthetic rate, and a large amount of organic matter accumulation, and the yield increase effect was more significant.


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