Nitrogen Fertility for Establishment of Velvet and Creeping Bentgrass Fairways and Tees

Benjamin W. Pease, John C. Stier, Andrew B. Hollman, Brian Horgan
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引用次数: 3

Abstract

Velvet bentgrass (Agrostis canina L.) has potential as a turf for low-input fairways and tees, but N fertility requirements during establishment are unknown. Our study compared the N fertility requirement of velvet bentgrass (VBG) cultivars to creeping bentgrass (Agrostis stolonifera L.) cultivars for fairway or tee establishment. Four N rates (0, 49, 146, and 293 kg/ha in six applications over 12 weeks) were tested on two cultivars of both bentgrass species [‘Memorial’ creeping bentgrass (CBG), ‘Penncross’ CBG, ‘SR7200’ VBG, and ‘Vesper’ VBG], on silt loams in Minnesota and Wisconsin during 2009. Treatments were arranged in a randomized block, split-plot design with four replications. Vesper established slower than Penncross through week 4 or 11, depending on location, after which all bentgrasses had ground cover approaching 100%. Increase in turf cover corresponded with increasing N rate for the first nine weeks after seeding (WAS). While all cultivars showed acceptable quality near trial end, CBG had better quality than Vesper in Wisconsin. In Minnesota, Memorial and SR7200 had better quality than Penncross and Vesper. The two greatest N rates provided similarly acceptable quality by about 8 WAS in both locations, while 0 kg N/ha never provided acceptable quality. All cultivars of VBG and CBG have similar N requirements during fairway or tee establishment.

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天鹅绒草和匍匐草球道和球台氮肥的建立
天鹅绒弯草(Agrostis canina L.)有潜力作为低投入球道和球座的草皮,但在建立期间的氮肥力需求尚不清楚。本研究比较了天鹅绒弯草(VBG)和匍匐弯草(Agrostis stolonifera L.)品种在球道和球座建设过程中对氮素的需要量。2009年,在明尼苏达州和威斯康星州的泥质壤土上对两种弯草品种[' Memorial '匍匐弯草(CBG), ' Penncross ' CBG, ' SR7200 ' VBG和' Vesper ' VBG]进行了四种氮肥(0、49、146和293公斤/公顷,为期12周,分6次施用)的试验。处理采用随机区、裂区设计,共4个重复。在第4周或第11周,Vesper比Penncross生长得慢,这取决于地点,之后所有的bentgrass都有接近100%的地面覆盖。在播种后的前9周,草皮盖度的增加与施氮量的增加呈正相关。近试验结束时,所有品种的品质均可接受,但CBG的品质优于威斯康辛州的Vesper。在明尼苏达州,Memorial和SR7200的质量好于Penncross和Vesper。两个最大氮肥施量在两个地点提供了类似的可接受的质量,约为8 WAS,而0 kg N/ha从未提供可接受的质量。所有VBG和CBG品种在球道或球座建立过程中对氮的需求相似。
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