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首页> 外文期刊>Applied turfgrass science >Effect of Nitrogen Source and Spray Volume on the Establishment and Colonization of Silvery-Thread Moss (Bryum argenteum Hedw.) in Putting Greens
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Effect of Nitrogen Source and Spray Volume on the Establishment and Colonization of Silvery-Thread Moss (Bryum argenteum Hedw.) in Putting Greens

机译：氮源和喷雾量对果岭银线苔藓（Bryum argenteum Hedw。）的建立和定殖的影响

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摘要

During the growing season, golf course superintendents often fertilize putting greens with low nitrogen rates on a weekly or biweekly interval, using foliar applications of soluble N sources such as ammonium sulfate (AMS) or urea. Silvery-thread moss(STM) is ectohydric; consequently, we hypothesized that STM would be injured from the higher partial salt index of AMS compared to urea, and that injury would be exacerbated by low spray volumes. Therefore, the objectives of this study were to: 1) determine if STM growth is reduced by AMS compared to urea, and 2) understand the effect of spray volume on STM growth, when using a high-salt-index N source. In greenhouse studies, AMS or urea were applied weekly at 4.4 lbs N acre-1 to nascent STM growing inpots. The N sources were applied at three spray volumes: 11, 44, and 110 gal H2O acre-1. Percent moss cover was determined weekly from digital images, and after seven weeks, gametophytes were harvested, dried, and weights recorded. Contrary to our hypothesis, AMS increased STM cover and dry weight compared to urea and an untreated control. Furthermore, spray volume did not affect STM cover at any rating date. Follow-up field studies were conducted on putting greens at Rocky Ford Turfgrass Research Center and Colbert Hills Golf Course. Although results were less consistent in the field, AMS again generallyincreased STM cover compared to urea and the untreated control. Superintendents managing STM infestations should limit or avoid use of AMS as an N source.
机译：在生长季节，高尔夫球场管理者通常每周或每两周使用叶面喷施可溶性N源（例如硫酸铵（AMS）或尿素）给低氮果岭施肥。银线苔藓（STM）是水生的;因此，我们假设，与尿素相比，AMS的较高的部分盐分指数会导致STM受到伤害，而低喷雾量会加剧这种伤害。因此，本研究的目的是：1）确定AMS与尿素相比是否通过AMS降低了STM的生长，并且2）了解使用高盐指数N源时喷雾量对STM生长的影响。在温室研究中，每周以4.4磅N acre-1的量向刚生长的STM盆栽施用AMS或尿素。以三种喷雾量施用N源：11、44和110 gal H2O acre-1。每周根据数字图像确定苔藓覆盖率，七周后，收获配子体，干燥并记录体重。与我们的假设相反，与尿素和未经处理的对照相比，AMS增加了STM的覆盖率和干重。此外，在任何额定日期，喷雾量均不影响STM覆盖率。在落基福特草皮草研究中心和科尔伯特山高尔夫球场进行了果岭的后续田野研究。尽管在现场结果不一致，但与尿素和未经处理的对照相比，AMS再次普遍提高了STM覆盖率。管理STM感染的管理者应限制或避免将AMS用作N源。

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