Growth and Wear Tolerance of Creeping Bentgrass as Influenced by Silica and Potassium Fertilization

규산 및 칼리 시비에 따른 벤트그래스 생육 및 내답압성 반응

  • Kim, Yong-Seon (Turfgrass & Environment Research Institute, Samsung Everland Inc.) ;
  • Kim, Ki-Sun (Department of Plant Science, Seoul National University)
  • 김용선 (삼성에버랜드(주) 잔디.환경연구소) ;
  • 김기선 (서울대학교 식물생산과학부)
  • Received : 2012.05.02
  • Accepted : 2012.05.22
  • Published : 2012.08.31

Abstract

The study was conducted to know whether turfgrass wear tolerance, growth, and quality could be improved by the application of silicon and potassium. First, turf responses to silicate and potassium were evaluated by several parameters such as, turf visual quality, root length, shoot density, and dry weight under the field condition. Second, turf responses to traffic frequencies were examined by turf growth (root) length, shoot density and dry weight) and soil hardness under the field condition. Finally, under traffic stress condition, the effects of silica and potassium application on wear tolerance were evaluated through the methods described above. Creeping bentgrass (Agrostis stolonifera) rooting were significantly improved by silica. The root length was enhanced by an increase in potassium silicate application. Certain level of light traffic is beneficial while frequent traffic cause serious adverse effect on visual quality of bentgrass. Under a traffic stress condition with 10 times of footing a day for 30 days, silica and potassium increased turf visual quality by 6.38% and 10.25% respectively when compared to the control. Silica and potassium treatment on trafficked plot increased turf visual quality by 11.4% and 10.2% respectively in comparison with the control with significant reduction of wear injury from the traffic. A co-application of potassium silicate with potassium sulfate provided the enhanced visual quality of turf as compared to application of silica or potassium fertilizer, respectively.

본 연구는 규산과 칼리 시용이 골프장 그린용 크리핑 벤트그래스 잔디의 생육과 품질 그리고 내답압성에 미치는 영향을 알아보기 위해 실시되었다. 먼저 규산과 칼리 시용에 따른 잔디반응을 살펴보기 위해서 필드조건에서 잔디품질, 뿌리길이, 잔디밀도와 건물중을 평가하였다. 다음으로 답압빈도에 따른 크리핑 벤트그래스의 잔디생육(뿌리길이, 잔디밀도, 건물중)과 잔디품질 및 토양경도를 조사하였다. 마지막으로 30일간의 답압처리조건에서 규산과 칼리의 내답압성 시비효과를 평가하였다. 규산 및 칼리 처리에 따른 잔디뿌리생육에 있어서 규산을 증가함에 따라 뿌리길이가 증가하였다. 크리핑 벤트그래스의 답압빈도에 따른 잔디품질은 1일 2회 처리구가 가장 우수하였으며, 7회 처리구는 무답압 처리구보다 우수하였다. 그러나 15회 이상 답압 처리구는 잔디품질이 월등히 저하하였다. 30일간의 답압처리시 규산 및 황산칼리의 시비효과는 잔디품질 향상 및 뿌리생육 증진효과가 있었다. 규산과 칼리를 처리하였을 때 잔디품질이 대조구보다 각각 6.38%, 10.25% 상승하였으며 규산과 칼리를 혼용 살포하였을 때 가장 잔디품질이 좋았다. 잔디 뿌리길이는 규산을 살포하였을 때 가장 길었으며 대조구보다 11.4%가 길었다. 따라서 답압이 예상되는 골프장 그린용 벤트그래스에서 잔디의 내답압성 증진을 위해서는 규산과 칼리의 시비가 효과적이었다.

Keywords

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