Nitrogen selection and growth regulator applications for improving shaded turf performance
Nitrogen selection and growth regulator applications for improving shaded turf performance
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用于提高遮荫草坪性能的氮选择和生长调节剂应用
DOI：
10.2135/cropsci2003.1399
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Stier
中科院分区：
文献类型：
--
作者：
K. Steinke;J. Stier
由于可供选择的品种很少，而且缺乏明确的管理实践，管理高尔夫球场发球区的草皮很困难。仰卧早熟禾（Poa supina Schrad.）是一种新的冷季型草坪草，在修剪高度2cm以上时具有良好的耐荫性。比较了仰卧早熟禾、肯塔基州早熟禾、和匍匐翦股颖（Agrostis stolonifera L.）高尔夫球场球座的遮阳率为80%。处理包括抗倒酯（TE）3个施用时期和2种N（液剂和颗粒剂）。在三种供试草坪草中，仰卧早熟禾提供了最好的整体草坪质量。液体尿素（叶面吸收）改善了匍匐茎禾草的草坪质量，而肯塔基州早熟禾对颗粒尿素（根系吸收）的反应更好。仰卧早熟禾对肥料类型的反应是季节性的。TE（0.0 5 kg ha-1）的每月和每两个月施用均显著改善了所有物种的草坪质量、密度和叶绿素水平，但每两个月施用的视觉效果在随后施用前消失。匍匐早熟禾的恢复速度比肯塔基州早熟禾或仰卧早熟禾快。TE和N源对DIFFERENTIAL的恢复没有影响。仰卧早熟禾有显着更大的增长率在晚秋至春季比肯塔基州或匍匐早熟禾。最好的草坪质量达到使用仰卧早熟禾，每月与TE处理，并在春季和液体N在夏季和秋季与颗粒N施肥。
Managing turf for shaded golf course tee boxes is difficult due to few species to choose from and a lack of defined management practices. Supina bluegrass (Poa supina Schrad.) is a novel cool-season turfgrass with good shade tolerance at mowing heights above 2 cm. This study compared the suitability of supina bluegrass, Kentucky bluegrass (Poa pratensis L.), and creeping bentgrass (Agrostis stolonifera L.) for golf course tees under 80% shade. Treatments included three application timings of trinexapac-ethyl [4-(cyclopropyl-α-hydroxy-methylene)-3,5-dioxo-cyclohexane-carboxylic add ethyl ester] (TE) and two N types, liquid and granular. Supina bluegrass provided the best overall turf quality among the three species tested. Liquid urea (foliar uptake) improved turf quality of creeping bentgrass while Kentucky bluegrass responded better to granular urea (root uptake). Supina bluegrass response to fertilizer type was seasonally dependent. Both monthly and bimonthly applications of TE (0.05 kg ha -1 ) significantly improved turf quality, density, and chlorophyll levels of all species, though visual effects of bimonthly applications dissipated before subsequent applications. Creeping bentgrass divot recovery was faster than for either Kentucky bluegrass or supina bluegrass. Divot recovery was not influenced by TE or N source. Supina bluegrass had significantly greater growth rates during late autumn through spring than either Kentucky or creeping bentgrass. The best turf quality was achieved using supina bluegrass, treated monthly with TE, and fertilized with granular N in the spring and liquid N in the summer and autumn.