Can PASP be used in agriculture?

Yes, absolutely. Sodium Salt of Polyaspartic Acid (PASP) is widely used in agriculture, primarily as a highly effective and environmentally friendly fertilizer synergist and plant growth stimulant.

Far from being just a theoretical concept, PASP has been validated by extensive field research on major crops. Here is a summary of its key agricultural applications and proven benefits based on recent studies:

Fertilizer Synergist & Enhanced Nitrogen Use Efficiency: This is PASP's primary role. When added to urea or other fertilizers, it can significantly improve nitrogen use efficiency.

Rice: In paddy field trials, applying modified PASP urea increased rice grain yield by 8.22% and boosted nitrogen use efficiency by over 38 percentage points compared to regular urea .

Maize (Corn): Research shows that PASP urea can achieve the same high yields as conventional urea but with 25% less nitrogen fertilizer applied, demonstrating its potential to reduce agricultural pollution .

Direct Plant Biostimulant: Recent research has uncovered that PASP acts directly on plants at the molecular level, not just by holding nutrients in the soil.

A 2024 study on Arabidopsis (a model plant) revealed that PASP treatment led to a 4-fold increase in photosynthetic rate, a 33% increase in leaf area, and a 25% increase in chlorophyll content by regulating genes related to photosynthesis and nitrogen metabolism .

Improving Soil Health: PASP can positively influence the soil ecosystem.

It has been shown to significantly enhance soil microbial diversity, which in turn promotes nutrient cycling and overall soil fertility .

In studies on degraded soil, PASP-containing organic fertilizers increased soil enzyme activity and organic matter content, creating better conditions for vegetable growth .

Novel Applications: Water Retention and Micronutrient Delivery: Beyond fertilization, PASP is being developed into new forms for sustainable agriculture.

Superabsorbent Hydrogels: Researchers have created biodegradable PASP-based hydrogels. These act as soil additives that can absorb and retain water (helping plants resist drought) and can be loaded with essential micronutrients like zinc and copper for slow release to plants .

In summary, PASP is a versatile and sustainable tool in modern agriculture. Its primary use is as a fertilizer booster to increase yields and reduce nitrogen pollution , but it also functions as a plant biostimulant , a soil conditioner , and a key component in new water-saving and nutrient-delivering hydrogels .