Growth of Creeping Bentgrass on a New Medium for Turfgrass Growth: Clinoptilolite Zeolite-Amended Sand
The research paper investigates the effects of clinoptilolite zeolite, a natural silicate mineral, on the growth and quality of creeping bentgrass (Agrostis palustris Huds.) when used as an amendment in sand-based turfgrass systems. The study was conducted at the University of Arizona's Turfgrass Research Center, beginning in the spring of 1981, and aimed to determine whether clinoptilolite could enhance nitrogen (N) use efficiency by sorbing ammonium (NH4+) and protecting it from microbial nitrification.
The researchers hypothesized that the unique properties of clinoptilolite, including its high cation exchange capacity and water retention capabilities, would lead to improved plant growth. The study involved a field experiment where different percentages of zeolite (5% and 10%) were mixed with sand, alongside varying nitrogen application rates (25, 50, and 75 kg ha^-1).
Results indicated that the addition of 5% and 10% clinoptilolite significantly improved germination and establishment rates of the bentgrass. By August 1981, turf quality was notably enhanced with the 5% zeolite treatment. However, the 10% treatment initially resulted in lower turf quality due to high sodium (Na) content in the zeolite. By January 1982, both zeolite treatments showed improved turf quality, although excess nitrogen application led to iron chlorosis, negatively impacting turf quality.
The study also found that zeolite amendments increased clipping yields and nitrogen-use efficiency, while root growth was positively correlated with soil organic carbon and phosphorus content. Interestingly, phosphorus uptake was affected by nitrogen levels, decreasing during hot summer months but increasing in cooler temperatures. Overall, the findings suggest that clinoptilolite zeolite has potential as a beneficial medium for turfgrass growth, enhancing both growth and nutrient efficiency.
This research paper is significant in the field of agronomy and turf management as it explores innovative approaches to improve turfgrass growth and sustainability. The use of clinoptilolite zeolite as a soil amendment presents a potential solution to enhance nitrogen use efficiency, which is crucial for reducing fertilizer inputs and minimizing environmental impacts associated with nutrient runoff.
The findings contribute to ongoing discussions about sustainable agricultural practices and the use of natural minerals in enhancing soil health and plant growth. By demonstrating the benefits of zeolite in turfgrass systems, the article provides valuable insights for turf managers, agronomists, and researchers interested in improving turf quality while promoting environmentally friendly practices. Readers can benefit from understanding the practical applications of clinoptilolite in turf management, as well as its implications for broader agricultural practices.
