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The influence of irrigation intensity on Kentucky bluegrass: Visual quality and morpho-physiological traits assessment
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MOhamad Akbari   , Mohamadreza Salehi Salmi * , Nourali Sajedi , Masoud Gomarian , Mehdi Changizi |
| Agricultral Sciennces and Natural Resource University of Khuzestan |
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Abstract: (348 Views) |
This study investigates the morpho-physiological responses of Kentucky bluegrass (Poa pratensis) to different irrigation levels. Employing a split plot within a completely randomized design, the experiment was conducted over time with three replications. Kentucky bluegrass seeds were sown in cylindrical pots measuring 23 cm in diameter and 20 cm in height under greenhouse conditions. Irrigation was administered to allow water to egress slowly from the pot's drainage outlets. Following a 6-month growth period and full establishment, three irrigation treatments (100%, 75%, and 50% of field capacity) were applied. Response variables were measured at four intervals: initial (day 0), 15th, 30th, and 45th days post-irrigation commencement. The study revealed a temporal decline in drought stress tolerance, grass quality, relative leaf water content, and chlorophyll levels, with the most pronounced effects observed at 50% field capacity irrigation. Concurrently, prolonged stress conditions led to a marked increase in malondialdehyde and proline concentrations. Analysis of soluble carbohydrates indicated an increase in this metric under the 75% FC irrigation treatment over time. In contrast, the 50% FC treatment showed an initial increase until day 15, followed by a decrease. Water consumption was highest in the 100%, 75%, and 50% FC irrigation treatment, in descending order. The findings highlight the critical impact of irrigation levels on the health and stress tolerance of Kentucky bluegrass, with implications for agricultural practices and water resource management.
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| Keywords: Dry, Turfgrass, Malondialdehyde, Visual |
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Full-Text [PDF 418 kb]
(72 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2024/06/1 | Accepted: 2024/10/5 | Published: 2025/02/26
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