DCPTA effectively promotes potato tuber enlargement, increases starch content, and enhances marketability. Its core mechanism lies in regulating the allocation of photosynthetic products and boosting carbon metabolic efficiency.
Promoting Tuber Enlargement: By enhancing leaf photosynthetic efficiency and increasing the transport and accumulation of photosynthetic products within the tubers, DCPTA significantly strengthens "source-to-sink" transport capacity. This drives rapid tuber cell division and expansion, thereby increasing the number of tubers per plant and improving tuber uniformity.
Increasing Starch Content: This plant growth regulator upregulates the activity of starch synthesis-related enzymes within the tubers—such as ADP-glucose pyrophosphorylase—facilitating the conversion of carbohydrates into starch. Measured results indicate that starch content can increase by over 10%.
Enhancing Marketability: DCPTA improves tuber skin smoothness and morphological consistency, while reducing the incidence of malformed tubers (e.g., cracked tubers or chain tubers). When combined with proper water and fertilizer management, marketability can be boosted by 15–20%.
Recommended Application Protocol:
Foliar Spray Concentration:During the initial stage of tuber enlargement (from bud formation to flowering), apply a **20–25 mg/L DCPTA solution** via foliar spray once every 7–10 days, for a total of 2–3 consecutive applications.
Tank-Mixing Suggestions:For synergistic effects—promoting dry matter accumulation and nutritional balance—DCPTA may be tank-mixed with 0.3% monopotassium phosphate or chelated trace elements** for simultaneous application.
Precautions: Avoid application during periods of high temperature or intense sunlight to prevent rapid evaporation of the spray solution, which could compromise absorption efficiency. Additionally, carefully control nitrogen fertilizer application rates to prevent excessive vegetative growth (stem and leaf overgrowth).
