Asian Journal of Turfgrass Science (아시안잔디학회지)

Turfgrass Society of Korea (한국잔디학회)
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The Effect of Compound Fertilizer Contained Slow Release Nitrogen on Turfgrass Growth in Kentucky bluegrasss and on Nitrogen Change in Root Zone

완효성질소성분이 함유된 복합비료의 시비가 토양 중 질소함량 변화 및 켄터키블루그래스 생육에 미치는 영향

  • Published : 2009.06.30
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Abstract

This study was conducted to investigate the effect of compound fertilizer contained slow release nitrogen such as isobutylidene diurea(IBDU) and methylene urea(MU) on kentucky bluegrasss and the change of nitrogen in the root zone after supplying these at AM turfgrass research institute with soil analysis, chlorophyll content index, leaf area index and dry weight during 6 months from July to December in 2007 year. Fertilizer treatments were designed as following; non-fertilizer(NF), straight fertilizer(CF), methylene urea(MU), isobutylidene diurea(IBDU). The every treatments were arranged a randomized complete block with three replications. Results obtained were summarized as follows: As relative to time after N fertilizers application, ammonium and nitrate in soil were increased, but T-N was decrease. The change of ratio of available Nand T-N by elapsed time after fertilizing was decreased in CF from 30days but increased until 45days. Compared with NF, the turf color index in CF, MU and IBDU was increased 1.5%, 2.5% and 2.3%, respectively, the chlorophyll content 16%, 25% and 26%, the dry weight 31%, 62% and 46% and shoot number 104%, 185% and 148%. The chlorophyll content index of MU and IBDU was increased 7.5% and 8.8% than that of CF, shoot number 40% and 22%, and dry weight 24% and 12% but turf color index was similar to that of CF. These results showed that the MU and IBDU application was supplied nitrogen for a long time in root zone by increasing an available nitrogen, and so promote turf grass growth such as chlorophyll content and shoot number in kentucky bluegrass.

본 연구는 완효성 질소 성분이 함유된 복합비료의 시비가 켄터키블루그래스 생육과 토양 중 변화에 미치는 영향을 시험하고자 2007년 7월부터 12월까지 6개월간 수행하였다. 처리구는 비료를 처리하지 않은 무처리구(NF), 속효성질소복합비료(11-5-7)를 처리한 대조구(CF), MU 질소성분이 함유된 복합비료를 처리한 MU 처리구(MU), IBDU 질소성분이 함유된 복합비료를 처리한 IBDU 처리구(IBDU) 등 4개 처리를 난괴법으로 수행하였다. 시비 후 속효성질소성분과 완효성질소성분의 경과시간에 따른 토양 중 변화와 엽색지수와 엽록소함량과 같은 잔디품질과 잔디 생육량, 잔디밀도 등 잔디 생육을 조사하였고, 그 결과를 요약하면 아래와 같다. 암모니아태 질소와 질산태질소는 모든 처리구에서 시비 후 시간이 경과함에 따라 점차 증가하나 총질소는 점차 감소하는 경향을 보였고, 질소질 비료 시비 후 30일까지는 속효성비료의 가용성 질소가 많았으나 시비 후 30일 이후에는 완효성 비료처리구에서 가용성 질소 비율이 증가하였다. 엽색지수와 엽록소함량을 NF와 비교한 결과, 엽색지수는 CF, MU 및 IBDU에서 각각 1.4%, 2.5%, 2.3% 증가하였고, 엽록소함량은 16%, 25%, 26% 증가하여 MU와 IBDU 처리구에서 높게 나타났다. 잔디생육량과 잔디밀도 조사에서 잔디생육량은 CF, MU 및 IBDU가 NF보다 각각 31%, 62%, 46% 각각 높았고, 잔디밀도는 104%, 185%, 148% 증가하였으며, 속효성비료처리구(CF)보다 완효성비료처리구(MU, IBDU)에서 잔디생육량 및 잔디밀도가 증가했다. 본 결과들을 통해 완효성 질소 함유비료는 속효성 질소에 비해 토양 중 가용성 질소의 함량을 높여 질소비효기간을 연장시키고, 염색지수, 엽록소함량 및 잔디밀도를 향상시켜 잔디 생육에 효과적이었다.

Keywords

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