Traffic Tolerance of Perennial Ryegrass (Lolium perenne L.) Cultivars as Affected by Nitrogen Fertilization

IF 1.5 3区 农林科学 Q2 HORTICULTURE
C. Pornaro, Gerald Henry, S. Macolino
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Abstract

Perennial ryegrass (Lolium perenne L.) is one of the most widely used species for sports fields in temperate climates because of its high wear tolerance. However, wear tolerance of cultivars may vary according to local environmental conditions and turfgrass management. In this study, we evaluated the wear tolerance of six perennial ryegrass cultivars (Adagio, Apple SGL, Equate, Firebird, Principal 2, Tetradark) under two fertility treatments (100 or 200 kg N⋅ha−1⋅yr−1) over 2 years. The field trial was performed at the Experimental Agricultural Farm at the University of Padova in northeastern Italy in a silty loam soil. Plots were arranged in a randomized complete block with three replications and subjected to three traffic events per week using a sports field wear simulator. Turfgrass quality (TQ), percent green cover (PGC), and normalized difference vegetation index (NDVI) were recorded every 2 weeks and averaged over each month. Although perennial ryegrass cultivars responded differently to wear stress, the higher nitrogen (N) rate positively affected the TQ of them all. ‘Tetradrak’ and ‘Equate’ had the lowest TQ, especially during the active growing seasons (spring and autumn). However, ‘Tetradark’ was particularly negatively affected during the cool fall months. The impact of a higher N fertilization rate on PGC and NDVI appeared to be more pronounced in spring than in fall. Furthermore, slight differences among cultivars and treatments were observed in summer and winter when temperatures were a limiting growth factor.
多年生黑麦草(Lolium perenne L.)栽培品种的耐交通性受氮肥的影响
多年生黑麦草(Lolium perenne L.)耐磨性强,是温带气候条件下运动场最广泛使用的草种之一。然而,栽培品种的耐磨性会因当地环境条件和草坪管理而有所不同。在这项研究中,我们评估了六个多年生黑麦草品种(Adagio、Apple SGL、Equate、Firebird、Principal 2、Tetradark)在两种肥力处理(100 或 200 千克氮⋅公顷-1⋅年-1)下两年的耐磨性。田间试验在意大利东北部帕多瓦大学的实验农业农场进行,土壤为淤泥质壤土。试验地块采用随机完整区组排列,有三个重复,每周使用运动场磨损模拟器进行三次交通活动。每两周记录一次草坪草质量(TQ)、绿化覆盖率(PGC)和归一化差异植被指数(NDVI),每月取平均值。虽然多年生黑麦草栽培品种对磨损胁迫的反应不同,但较高的氮(N)含量对它们的草坪质量都有积极影响。Tetradrak "和 "Equate "的TQ最低,尤其是在生长旺季(春季和秋季)。然而,'Tetradark'在凉爽的秋季受到的影响尤其大。较高的氮肥施用量对 PGC 和 NDVI 的影响似乎在春季比秋季更明显。此外,在夏季和冬季,当温度成为限制生长的因素时,不同栽培品种和处理之间的差异也很小。
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来源期刊
Hortscience
Hortscience 农林科学-园艺
CiteScore
3.00
自引率
10.50%
发文量
224
审稿时长
3 months
期刊介绍: HortScience publishes horticultural information of interest to a broad array of horticulturists. Its goals are to apprise horticultural scientists and others interested in horticulture of scientific and industry developments and of significant research, education, or extension findings or methods.
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