Year: 1998
Type: article
Abstract: The active ingredient of a product known as “AmiSorb” is carpramid, a long-chained polyaspartate polymer. This product is currently being marketed as a soil or irrigation water applied nutrient absorption enhancer for vegetable crops. Our objective was to evaluate the growth, yield, and leaf photosynthetic responses of muskmelon ( Cucumis melo L., `Caravelle') and bell pepper ( Capsicum annuum L., `Enterprise') to a range of carpramid application rates under well irrigated and fertilized conditions. Carpramid solutions were applied at concentrations of 0, 200, 400, 600, and 800 mL·L -1 (0 to 0.18 mL per carpramid plant) in both greenhouse and field experiments. Biomass of individual plant parts and leaf area were measured at weekly intervals during the greenhouse experiment by destructive sampling. Light saturated leaf photosynthetic rates as a function of both carpramid treatment as well as leaf position on the vine were measured for muskmelon in the field experiment. Final yield was determined for both muskmelon and bell pepper in the field experiment. None of the plant response variables were significantly ( P ≤ 0.05) affected by carpramid treatment in either the greenhouse or field experiments. Leaf photosynthetic rates increased from the youngest leaf on the vine to the sixth leaf, counting basipetally. We conclude that further research under nutrient deficient conditions may be warranted for this product.
Source: HortScience
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2585445554