Please wait a minute...
Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front Agric Chin    2009, Vol. 3 Issue (2) : 186-189     DOI: 10.1007/s11703-009-0038-6
RESEARCH ARTICLE |
Growth responses of Kentucky bluegrass (Poa pratensis L.) to trinexapac-ethyl applied in spring and autumn
Guangyu FAN, Xiuju BIAN(), Huibin LI, Zhao MENG, Shengyao LIU
1College of Agronomy, Agricultural University of Hebei, Baoding 071001, China
Download: PDF(94 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract  

The practices with low clippings production to save time, money, or landfill space, were favored by turf managers. Understanding the responses of Kentucky bluegrass (Poa pratensis L.) to Trinexapac-ethyl (TE) would facilitate recommendations regarding its safe and effective use in Northern China. The objectives of this study are (1) to investigate the effects of TE on vertical growth, clipping yield, leaf width, and chlorophyll content of Kentucky bluegrass, and (2) to compare the seasonal application impacts of TE. Both spring and autumn experiment results demonstrated that Trinexapac-ethyl applied to Kentucky bluegrass suppressed the vertical grass growth and significantly reduced the Kentucky bluegrass clippings production within a few weeks after initial treatment. Applied trinexapac-ethyl enhanced Kentucky bluegrass leaf width in both spring and autumn experimental periods. Discoloration on leaf tips was observed and lasted for four weeks when the same TE rate of 0.191 mL?m-2 was applied in early autumn. Darker leaves with higher chlorophyll content compared with non-TE-treatments appeared after the initial four weeks of the treatment in autumn and the treatment for the entire spring.

Keywords Kentucky bluegrass      trinexapac-ethyl      clipping yield      leaf width      chlorophyll content     
Corresponding Authors: BIAN Xiuju,Email:bianxj@hebau.edu.cn   
Issue Date: 05 June 2009
URL:  
http://academic.hep.com.cn/fag/EN/10.1007/s11703-009-0038-6     OR     http://academic.hep.com.cn/fag/EN/Y2009/V3/I2/186
Fig.1  Effects of trinexapac-ethyl on Kentucky bluegrass height
TE treatmentweeks after initial application
springautumn
24682468
CK50.99 a29.12 a27.42 a38.89 b48.12 a35.16 a34.27 a22.03 a
TE27.37 b14.99 b26.54 a48.93 a36.64 b21.32 b29.19 a23.04 a
Tab.1  Clippings dry weight after TE application (g?m)
Fig.2  Effects of trinexapac-ethyl on Kentucky bluegrass leaf
Fig.3  Effects of trinexapac-ethyl on Kentucky bluegrass
1 Adams R, Kerber E, Pfister K, Weiler E W (1992). Studies on the action of the new growth retardant CGA 163’935 (Primo). In: Karssen C M, Van Loon L C, Vreugdenhil D, eds. Progress in Plant Growth Regulation . Dordrecht: Kluwer Academic Publishers, 818-827
2 Burpee L L, Green D E, Stephens S L (1996). Interactive effects of plant growth regulators and fungicides on epidemics of dollar spot in creeping bentgrass. Plant Dis , 80(11): 1245-1250
3 Daniels R W, Sugden S K (1996). Opportunities for growth regulation of amenity grass. Pestic Sci , 47: 363-369
doi: 10.1002/(SICI)1096-9063(199608)47:4<363::AID-PS422>3.0.CO;2-N
4 Ervin E H, Koski A J (1998). Growth responses of Lolium perenne L. to trinexapac-ethyl. Hort Sci , 33: 1200-1202
5 Fagerness M J, Yelverton F H (2000). Tissue production and quality of Tifway bermudagrass as affected by seasonal application patterns of trinexapac-ethyl. Crop Sci , 40: 493-497
6 Goatley J M Jr, Maddox V L, Watkins R M (1996). Growth regulation of bahiagrass (Paspalum notatumFluegge) with imazaquin and AC 263, 222. Hort Sci , 31: 396-399
7 Johnson,B J (1993). Response of tall fescue to plant growth regulators and mowing frequencies. J Environ Hortic , 11(4): 163-167
8 Li G Y (2006). Study on influence of applying plant growth retardants on growth of turfgrass. Dissertation for the Master Degree . Baoding: Agricultural University of Hebei, 50-51 (in Chinese)
9 Li S Q, Lei T W, Yan W H, Qu L Q, Xiao J (2006). Effects of mowed heights on the water consumption of turf grasses in Beijing. Agricultural Engineering , 22(11): 74-78 (in Chinese)
10 Qian Y L, Engelke M C, Foster M J V, Reynolds S (1998). Trinexapac-ethyl restricts shoot growth and improves quality of ‘Diamond’ zoysiagrass under shade. Hort Sci , 33: 1019-1022
11 Watschke T L, Di Paola J M (1995). Plant growth regulators. Golf Course Manage , 63: 59-62
No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed