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Warm-season Turfgrass Quality, Spring Green-up, and Fall Color Retention under Drip Irrigation

机译:滴灌条件下暖季草坪草的质量,春季绿化和保留秋季色彩

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摘要

Information is needed to determine if adequate turf quality can be maintained over several growing seasons when grasses are irrigated from the subsurface. A study was conducted in Las Cruces, NM, from 2005 to 2008 to investigate the performance of onebermudagrass blend and ten warm-season species and varieties under subsurface drip irrigation. Plots were mowed at 7.5 cm, irrigated at 90% ETo and fertilized to prevent nutrient stress. Visual ratings were taken monthly from March 2005 to June 2008 todetermine turf quality, spring green up, and fall color retention. Normalized Difference Vegetation Indices (NDVI) were collected monthly from March 2007 through June 2008. When quality data were averaged over the 4 years, seashore paspalum ‘SeaDwarf,’‘Sea Spray,’ and zoysiagrass ‘De Anza’ had the best performance and sideoats grama ‘Vaughn’ the worst during the summer. The study showed that inland saltgrass ‘A138’ achieved the fastest spring green-up, whereas De Anza was the slowest. SeaDwarf stayed green the longest in the fall, while Vaughn was the first cultivar to lose color and go dormant. The correlation between visual turfgrass quality and NDVI was significant (P < 0.001) but not very strong, yielding a correlation coefficient of r =0.54.
机译:需要信息来确定当从地下灌溉草地时,在几个生长季节中能否维持足够的草皮质量。 2005年至2008年,在新墨西哥州的拉斯克鲁塞斯进行了一项研究,以研究地下滴灌条件下单一bermudagrass混和和10个暖季物种的变化。将地块割成7.5 cm,以90%ETo灌溉并施肥以防止营养胁迫。从2005年3月至2008年6月,每月进行视觉评级,以确定草皮质量,春季绿色和秋季保色性。从2007年3月至2008年6月每月收集归一化差异植被指数(NDVI)。当对4年的平均质量数据进行平均时,海滨雀spa“ SeaDwarf”,“ Sea Spray”和zoysiagrass“ De Anza”的性能和侧枝最好格拉玛“沃恩”在夏季表现最差。研究表明,内陆盐草“ A138”的春季绿化速度最快,而德安扎则最慢。 SeaDwarf在秋天保持最长的绿色,而沃恩则是第一个失去颜色并休眠的品种。视觉草皮草质量与NDVI之间的相关性很显着(P <0.001),但不是很强,相关系数r = 0.54。

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