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Acta Prataculturae Sinica ›› 2015, Vol. 24 ›› Issue (2): 31-40.DOI: 10.11686/cyxb20150204

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Nutrition effects on growth and endogenous hormones in kentucky bluegrass

LIU Qiang1, 4, ZHANG Suoke1, 2, SUN Wanbin1, 3, YU Ling1, 2, MA Huiling1, 2, 3, *   

  1. 1.College of Pratacultural, Gansu Agricultural University, Lanzhou 730070, China;
    2.Key Laboratory of Grassland Ecosystem, Ministry of Education, Lanzhou 730070, China;
    3.Sino-U.S. Centers for Grazingland Ecosystem Sustainability, Lanzhou 730070, China;
    4.Gansu State Farms Academy of Agricultural Research, Wuwei 733006, China
  • Received:2014-09-05 Online:2015-02-20 Published:2015-02-20

Abstract: Nutrient application is essential in turf management. To help reveal the mechanisms of fertilizer improvement in turfgrass growth, field experiments were carried out testing different fertilizer combinations. The relationship between endogenous hormone content and growth of kentucky bluegrass (Poa pratensis) was determined; turf quality was also evaluated. Fertilizer application (bio-fertilizer and citric acid) significantly affected turf quality. Fertilization significantly improved indoleacetic acid (IAA) and zeatin (ZT) content and restricted the synthesis and accumulation of abscisic acid (ABA).Post fertilization, IAA and ZT content increased with time (35 days). However, ABA content was relatively low and decreased after fertilizer application.