• 한국토양비료학회지
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• 제39권6호
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• pp.345-350
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• 2006

본 시험은 벼 종이멀칭이앙 시 적정한 완효성비료의 시용량을 구명하고자 경기도 수원에 위치한 작물과학원 벼 연구 포장 강서통에서 대안벼를 2004년 5월 28일에 중묘를 멀칭기계 이앙하였다. 시험에 사용한 완효성비료는 LCU (Latex Coated Urea, 21-7-9) 복비를 시용하였다. 피복재료는 생분해성 폴리에스터 (PES $10{\mu}m$)+재생지를 이용하여 피복하였다. 처리내용은 관행질소시비량 ($110kg\;ha^{-1}$)을 기준으로 하여 완효성비료호 기준시비량의 60%, 80%구, 100%구와 관행 및 무질소구를 두고 시험을 수행하였다. 벼 멀칭이앙 시 모의 결주율은 무피복의 관행이앙과 차이가 없었다. 잡초발생 및 방제가는 시비량이 적을수록 잡초가 다양해지고 잡초방제가가 낮아지는 경향이었다. 벼 이앙 후 일수가 진전됨에 따라서 시비량이 많을수록 초장와 경수가 크거나 많아지는 경향이었고 완효성비료 80%구의 벼 생육이 관행시비구와 차이가 없는 경향이었다. 엽색도와 토양 중 $NH_4{^+}-N$도 유사한 경향을 보였다. 따라서 수량구성요소 중 $m^2$당 이삭수의 증가로 인하여 완효성비료 80%구가 관행과 수량 차이가 없었다. 농업적 질소이용 효율은 시비량이 적을수록 증가하였다. 벼 종이멀칭이앙 시 벼 수량 및 수량구성요소, 잡초발생 및 방제가, 시비효율 등을 종합적으로 고려하여 관행질소 시비량의 80%를 완효성비료로 이앙 전에 밑거름으로 전층시비 하는 것이 알맞을 것으로 생각된다.

• 유기물자원화
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• 제18권4호
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• pp.77-85
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• 2010

양돈분뇨의 처리는 환경문제 해결과 자원으로서의 이용 등 중요한 의미가 있다. 본 연구에서는 양돈분뇨의 처리 및 자원화 방법으로 개발된 SCB 액비를 토양에 시용했을 때 양분이 작물에 흡수 이용되는 양과 토양중에 잔류하는 양을 조사하여 SCB 시용량 및 시용방법 결정을 위한 기초자료를 제공하고자 하였다. 무비, 화학비료, 저장액비, SCB 액비를 완전임의배치 5반복으로 처리하여 시험을 수행하였다. 벼의 생육은 화학비료구에서 가장 좋았고, 다음으로 저장액비, SCB 액비, 무비구 순이었다. 볏짚 수량 역시 화학비료 처리구에서 가장 많았으며, 다음으로 저장액비, SCB 액비, 무비구 순이었다. 생육상황은 수량까지 이어져 무비구는 처리구보다 감수 경향을 보였으며, 다른 처리구 간에는 대동소이하였다. 식물체의 무기성분 흡수량에서도 화학비료를 비롯한 처리구의 질소, 인산 등 각종 무기성분 흡수량이 무비구에 비하여 많았으나, 이를 제외한 처리 간에는 큰 차이가 없었다.

• 아시안잔디학회지
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• 제15권2호
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• pp.87-104
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• 2001

This Study was carried out to investigate on the environmental effects of golf courses and to find a solution to the negative effects in Korea. The results were ai follows. 1. There were 152 golf courses opened in December 2000. 113 golf courses were member-ship and 39 golf courses were public. Users (golfer) were over 12,000,000 in 2000. 2. Total area of golf courses was 0.8% as compared with total area of farmland in 1999. Total amount of agricultural chemicals used in golf courses was 0.3% of total amount of agricultural chemicals used in Korea. The remaining amount of agricultural chemicals in golf courses tested were almost below the permitted limits. 3. Recently, total amount of fertilizers in green decreased 5~7g/$m^2$/year as compared with the recommended. 4. The control by antagonistic microorganisms and the fertilizing of the organic matter or the organic fertilizer were effective to decrease the amount of agricultural chemicals used. To success the control of microorganisms, active antagonistic microorganisms had to be applied over the recommended dose eve교day. Though fertilizing of organic fertilizer, slow release fertilizer, was effective to suppress dollar spot, necrotic ring spot. fungicides were required as a supplementary means when disease symptom was very heavy. 5. Zoysiagrass was fertilized intensively from May to August. Cool-season grasses were fertilized intensively from March to May and September to October. The fall fertilizing of Zoysiagrass was carried out to the begining of October. The fall fertilizing of cool-season grasses were carried out to the end of November or the begining of December. The fertilizing amount of Zoysiagrass was 10g/$m^2$/year. The fertilizing amount of bentgrass was 25~27g/$m^2$/year.

• 한국초지조사료학회지
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• 제41권2호
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• pp.84-95
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• 2021

The purpose of this study was to assess the forage productivity and nutritive value of kenaf at different fertilizer application amounts and various stages of maturity. The experiment was conducted from May to September 2020, the amount of 80 kg of kenaf seed/ha was supplied with different types and amounts of nitrogen fertilizer and the plants were harvested at 10-day intervals from different harvesting dates (24^th August and 3^rd, 13^th, 23^rd September). According to the different fertilizer types and application amounts, the highest kenaf height was recorded in the inorganic fertilizer amounts of 200 and 250 kg N/ha and the fresh and DM yield were significantly improved in the inorganic nitrogen amount of 250 kg N/ha. The highest CP and TDN content in the leaf was achieved in the inorganic fertilizer amounts of 150 and 200 kg N/ha, respectively; and the highest TDN content in the stem was also found in the inorganic fertilizer amount of 200 kg N/ha. According to the different harvesting dates, the highest DM ratio was found in the harvesting date of 13th September, the leaf ratio increased with advanced maturity, whereas the stem ratio decreased significantly and the highest DM yield of kenaf was recorded in the harvesting dates of 13^th and 23^rd September. Besides, the highest CP, CF, CA, ADF, NDF and TDN content in the leaf as influenced by different harvesting dates was 15.4, 31.8, 10.2, 22.1, 34.7 and 76.5%, respectively, and the CP, CA, ADF and TDN in stem decreased significantly with advanced maturity of kenaf. In conclusion, the optimal fertilizer amounts and the appropriate harvesting dates for a high forage yield and high-quality kenaf as livestock feed were the inorganic fertilizer application amounts of 200-250 kg N/ha and from 13^th and 23^rd September, respectively.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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• pp.670-675
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• 1999

The effect of fertilizer applicatioin on ponded and percolation water in paddies were evaluated at the field plots of the Chungbuk National University for irrigation period. The chemical fertilicers were applied to the study polts at an average application rate of 77, 110, 165kgN/ha, respectively. The concentration of T-N , T-P and COD in ponded water greatly depends on the amount and timing of fertilizer applied. Therefore, the decrease in the amount of fertilizer and proper water management may be needed to decrease in the amount of fertilizer and proper water management may be needed to reduce the runoff loading.

• 원예과학기술지
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• 제30권6호
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• pp.635-641
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• 2012

In Korea, slurry composted and biofiltered (SCB) liquid fertilizer is produced through the composting and biofiltering of animal waste. An appropriate guidelines involving proper treatment of SCB liquid fertilizer on turfgrass should be considered. An experiment was conducted to determine the optimum application amount, timing, and frequency of SCB liquid fertilizer for Zoysia japonica 'Millock'. The SCB liquid fertilizer was applied in low, medium, and high amount (N at 15, 25, and 40 $g{\cdot}m^{-2}$ per year in 2010, and 10, 20, and 40 $g{\cdot}m^{-2}$ per year in 2011, respectively) and treated during the growing season or dormancy period. During the growing season, SCB liquid fertilizer was applied twice or four times. The greatest improvement in turf quality for both years was in SCB plots applied four times with N at 40 $g{\cdot}m^{-2}$ per year during the growing season (SH4). This treatment exhibited turf color retention in the fall, and enhanced clipping yield during the growing and fall seasons. SCB plots with four times during the growing season (SL4, SM4, and SH4) exhibited higher shoot density relative to the same amount of other SCB treatments. Plots treated during the dormancy period also showed a high turf color index during the next growing season in 2011. The results indicate that SCB with high amount up to N at 40 $g{\cdot}m^{-2}$ per year applied four times during the growing season and dormant application produced high turf quality and growth, and could be recommended as an optimum application guide.

• 한국자원식물학회지
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• 제20권2호
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• pp.129-132
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• 2007

삼백초 1회 수확 후 질소 추비량에 따른 생육 및 수량을 검토하여 재배법 확립의 기초자료를 제공하고자, 무시용 등 4처리를 두어 2002년부터 3년간 시험한 결과, 초장, 엽의 크기, 경태, 절수, 상품엽수, 분얼수 등 경엽과 근경의 생육은 1차 수확 후 질소 추비량이 많을수록 길거나, 굵거나, 많은 경향으로 양호하였다. 경엽수량은 질소 추비량이 많을수록 증가되어 무시용 158kg/10a 대비 3, 6, 9kg/10a 사용 시 각각 20%, 42%, 60% 증수되었고, 성분함량 중 rutin은 질소 추비 사용량이 많을수록 증가되는 경향이었으며, quercitrin은 질소 추비 3kg/10a 시용에서 다소 높았다.

• 한국축산시설환경학회지
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• 제16권2호
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• pp.115-122
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• 2010

A major problem within the agricultural/farming community concerns the enormous amount of manure produced by livestock; one possible solution to this problem is to use the animal slurry as a liquid fertilizer. While there are several areas where this fertilizer could be used, one promising area of application is within chestnut tree fields. However, since most of these fields are located on slopes of varying grades and not on flat land, a different spread system is required. Generally, chemical fertilizer is spread in the chestnut field manually by hand; not only does this require a great deal of manpower it is also very difficult and hard work. In our lab experiment, we investigated the relationship between the amount of fertilizer spread and the length of pipe used at varying pressure levels. The hose in our system utilized PVC piping with evenly spaced holes for the fertilizer to dissipate. We initially found that the amount of spread was greatly reduced by reducing pipe pressure. While the difference of the amount of spread during fertilizing was not great, we did find that the reduction of the spread could be correlated to the frictional resistance of the inner lining of the pipe. Based on this, we hypothesized that an increase in pipe pressure would yield a consistent spread. Additionally, a similar outcome could be obtained by regulating the distance of the holes in the pipe and their diameter.

• 한국작물학회지
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• 제12권
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• pp.37-41
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• 1972

본 실험은 일반적으로 인산성분이 부족한 신개척박지에서 대두를 재배하는 경우 증수 가능한 적정 인산시비량을 구명하기 위하여 실시하였다. 품종 <익산>을 공시하여 휴폭 60cm 주간 30cm의 재식거리로 점파하였으며 시비는 질소와 가리는 각구 공히 표준시비량만을 시용하고 인산성분만은 무비료구, 표준시비량구, 이배비구 및 삼배비구 등 사개시비수준으로 구분하였으며 시험구배치는 난괴법을 적용하였다. 그 실험 결과를 요약하면 다음과 같다. (1) 협수 및 10a당 수량을 증가시키는데 유효한 적정 인산시비량은 표준시비량만으로 충분하다는 사실을 인정하였다. (2) 간장 및 경직경은 동일 시비 수준 동일 반복구내의 개체들 간에서도 변이가 심하여 인산시비량의 다소에 따르는 일정한 경향을 찾아 볼 수가 없었다. (3) $0.18\ell$ 중 및 $0.18\ell$ 입수도 인산시비량의 다소에 의해서 영향되는 바가 적은 것으로 인정하였다. (4) 천입중은 인산시비량이 이배비량에 이르기 까지는 현저하게 증가함을 인정하였다.

• 한국토양비료학회지
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• 제34권3호
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• pp.147-152
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• 2001

This study was carried out to investigate the effect of application time and amount of liquid pig manure on growth and yield of rice plant and infiltration water quality. Liquid manure treatment with higher application rate and closer application time to transplanting time showed higher plant height and number of tiller at panicle formation stage, but it caused the plant disease and pest and lodging. In liquid manure treatment with higher application rate, number of panicles per hill and number of spikelets per panicle were higher but yield of rice was less than chemical fertilizer treatment due to low rate of ripeness and 1,000 grain weight. $NO_3-N$ concentration in infiltration water sample was increased with increasing application amount of liquid manure and closer application time to transplanting of rice plant. With consideration yield of rice and environment such as groundwater quality, the proper application amount were 150% and 100% of recommending N fertilizer level (11kg) at before winter and April or May treatment, respectively.