• 한국토양비료학회지
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• 제46권6호
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• pp.482-486
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• 2013

Assessment of nutrient balance in region unit is important to make a decision on nutrient management in agriculture. In this study, the nutrient demand in arable land and nutrient supply from livestock manure and chemical fertilizer were estimated from pig-concentrated areas. Three regions (H, I and J) were selected on the basis of pig numbers per unit area of arable land. In H and I regions, nitrogen amount from pig manure occupied about 50% of total livestock manure. Nutrient supply was three times higher compared to the nutrient demand in each of 3 regions. Soil available phosphate of higher pig-populated area in regional unit was higher than less populated livestock area. Therefore, livestock manure-derived regional management and monitoring of soil nutrient contents is necessary for the minimization and improvement of nutrient surplus.

• Weed & Turfgrass Science
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• 제3권3호
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• pp.246-252
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• 2014

본 연구는 두 종류의 아미노산 비료를 엽면시비하여 크리핑 벤트그래스의 생육효과를 평가하기 위해 수행되었다. 처리구를 비료의 종류와 시비량에 따라 무처리구(NF), 대조구(CF), 아미노산 비료 정량 처리구(ALF)와 배량 처리구(2ALF), 아미노산-사포닌 비료 정량 처리구(ASLF) 및 배량 처리구(2ASLF)로 설정하여 처리한 후 엽색지수, 엽록소지수, 건물중, 잔디 밀도, 뿌리 길이 및 잔디의 양분 함유량 등을 조사하여 생육을 평가하였다. 잔디의 품질을 나타내는 엽색지수와, 엽록소지수, 잔디 밀도 및 잔디 뿌리 길이는 CF와 비슷하거나 약간 높았다. 잔디의 생육을 나타내는 건물중과 잔디 중 질소와 칼리 함량, 질소 흡수량 및 이용율은 2ALF와 2ASLF구에서 높았다. 이러한 결과를 통해 아미노산 비료(AaLF)와 아미노산-사포닌 비료(AaSLF)의 시비가 잔디의 질소 흡수 및 이용율이 증가하여 잔디 잔디생육과 잔디 품질을 향상시키는 것을 알 수 있었다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.643-648
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• 2005

The objective of this paper is to analyze the environmental effects by the fertilizer change with wastewater reuse for agriculture. For this research, Lysimeter tests are being implemented to cultivate rice with different levels of fertilizer applications with wastewater irrigation., and to analyze the nutrient loading by wastwater reuse in paddy fields was examined the CREAMS-PADDY model. CREAMS-PADDY model is modified from CREAMS model for considering the hydrologic cycles in paddy field. As a result, in the lysimeter treated by irrigation with wastewater and chemical fertilizer with half of the conventional amount showed generally similar tendency to the control plot. This may require the modifications of standard cultural practices for rice in terms of fertilizer and pesticide applications. However, high concentration of sodium in wastewater might cause damage to physico-chemical properties of paddy soil. And the wastewater reuse effects on nutrient loads were quantitatively analyzed and this results provide the reasonable management for agricultural reuse.

• 한국토양비료학회지
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• 제4권1호
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• pp.75-78
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• 1971

비료(肥料)는 생산증가(生産增加)를 통(通)하여 농가소득(農家所得)을 높이고저 쓰이는 자료(資料)이다. 때문에 수익(收益)을 최대(最大)로 하는 경제적(經濟的) 적량(適量)을 권장하는 것이 원칙(原則)이나 만약(萬若) 그 분량(分量)이 넉넉치 못할 경우(境遇)에는 작물별(作物別)로 얼만한 분량(分量)을 권장해야 할것인가가 문제(問題)가 된다. 본지(本誌)에서는 제한(制限)된 양(量)의 비료(肥料)를 시용(施用)하여 농가소득(農家所得)을 최대(最大)로 한다는 점(點)에서 기왕(旣往)에 실시(實施)된 비료시험(肥料試驗) 결과(結果)를 토대(土臺)로 1968연도(年度)에 수도(水稻), 대맥(大麥), 소맥작(小麥作)에 공급(供給)한 단위면적당(單位面積當) 비료량(肥料量)에 대(對)하여 검토(檢討)하였다. 이검토(檢討)에서는 질소(窒素), 인산(燐酸), 가리(加里)를 단가(單價)를 61.90원, 41.63원 및 20.78원으로 했으며, 벼(정조(精租))대맥(大麥), 소맥(小麥)의 1kg 당(當) 가격(價格)을 32.33원, 23.12원 및 26.02원으로 했다. 이 검토(檢討)에 의(依)하면 1968연도단위면적당(年度單位面積當) 비료공급량(肥料供給量) 10, 7.5 및 7.5kg는 9.14, 7.11 및 8.75kg로 함이 더 유리(有利)하며 이것을 금액(金額)으로 환산(換算)했을때 1,819원의 순리익증가(純利益曾加)를 보인다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.109-109
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• 2022

The global population is increasing every year, and the amount of food waste is also increasing. Direct landfilling of food waste has been prohibited since 2005, and in accordance with the London Convention in 2013, the discharge of livestock manure, sewage sludge, and food waste into the sea is prohibited. In the case of incineration to treat the discharged food waste, the heat point is lowered due to the moisture in the food waste itself, so fuel must be added. Therefore, this study was conducted to get basic data for setting the limit of application by investigating the growth and yield of crops after treating food waste dry powder mixed fertilizer (MF) on red pepper. In the experiment, continuous cultivation was carried out for two years in 2021 (1st year) and 2022 (2nd year). The treatment groups were set as Not Treatment (NT), Chemical Fertilizer (CF), Mixed Fertilizer (MF), Mixed Fertilizer×2 (MF×2). After harvest, crop growth and yield were investigated. As a result of the 1st years of growth survey, CF, MF, MF×2 show significant difference in shoot length compared to NT. About fresh weight and dry weight, CF show significant difference compared to NT. The 2nd years of growth survey, the shoot and root length, fresh weight did not show significant difference with NT. In case of dry weight, MF is significant increased compared to NT. As a result of the yield survey of the 1st year, all treatment groups did not show a significance in yield compared to the NT. In case of 2nd year, all treatment groups show significantly increased value compared to NT. The yield of MF was highest among the treatment groups. In the future, it is thought that it is necessary to quantitatively evaluate the effect of food waste dry powder mixed fertilizer through additional experiments and continuous cultivation, and to establish an appropriate amount of use and establishment of a manual based on this.

• Journal of Biosystems Engineering
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• 제31권2호
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• pp.108-114
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• 2006

This study was conducted to design and fabricate a controller for variable-rate application of granular fertilizer based on physical and chemical information, to analyze the performance of the controller and characteristics of a discharger. The result of the study are summarized as follows: 1. The charge ratios of discharger by accumulation heights of fertilizer in hopper were examined, and the variations in charge ratio were $72.58{\sim}93.33%$ and $63.14{\sim}94.42%$ for the fertilizers Super 21 and Sinsedae, respectively. The charge ratio also decreased as the rotational speed of discharger increased. 2. The coefficient of variation of discharge amount by rotational speed and discharge time of discharger were in the range of $2.94{\sim}11.23%$ and $2.82{\sim}10.80%$ for the fertilizer of Super 21 and Sinsedae. Except the rotational speed of 12 rpm, the coefficient of variation for discharge amount were relatively small with 4% more or less 3. In order to evaluate the rotational speed of discharger, the control signal in the range of $0{\sim}5V$ was subdivided into the 50 steps by 0.1V. The regression equation for the rotational speed of discharger was Y=55.984X-79.174(X: input voltage, V, Y: discharger speed, RPM) and the $R^2$ was 0.99. 4. In order to evaluate the performance of the controller for variable-rate application of granular fertilizer, settling time to unit step input was examined. The settling time varied from 0.8sec to 1.4 sec.

• 한국토양비료학회지
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• 제4권2호
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• pp.155-159
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• 1971

1. 수도품종(水稻品種), 진흥(振興)을 써서 1969년(年)에 한 농가(農家)포장에서 실시(實施)한 비료시험결과(肥料試驗結果)에 입각(立脚)하여 유효분얼기와 유수형성기(幼穗形成期)에 시비(施肥)할 질소비료량(窒素肥料量)을 결정(決定)하는 한 방법(方法)이 연구(硏究)되었다. 본시험(本試驗)에서는 0.1 ha 당(當) 4kg 상당(相當)의 질소(窒素)가 기비(基肥)로 각처리구(各處理區)에 시비(施肥) 되었다. 2. 유수형성기(幼穗形成期)에 시비(施肥)한 질소(窒素)는 수량(收量)을 현저히 증가시켰고 또 분얼기(分蘖期)에 시비(施肥)해야 할 질소량(窒素量)을 절하(切下)하고 유수형성기(幼穗形成期)에 0.1 ha 당(當) 6.82kg의 질소(窒素)를 시용(施用)했을 때의 수량(收量) 670kg/0.1ha은 분얼기(分蘖期)에 8kg 이상(以上)의 질소(窒素)를 시용(施用)했을 때의 수량(收量) 644kg/0.1ha 보다 높았다. 이러한 사실(事實)은 유수형성기(幼穗形成期)에 주는 추비(追肥)가 얼마나 중요(重要)한 것인가를 시조(施調)해 주는 것이다. 3. 분얼기(分蘖期)과 유수형성기(幼穗形成期)에 주어야 할 질소량(窒素量)은 토양비옥도(土壤肥沃度)에 따라 다른 것이기 때문에 이 양생육기(兩生育期)에 주어야 하는 질소량(窒素量)과 토양분석치(土壤分析値)와의 상관연구(相關硏究)는 필요(必要)한 것으로 그 시행(施行)을 제안(提案)한다. 4. 합리적(合理的) 시비법(施肥法)의 수립을 위하여 각생육기(各生育期)에 시비(施肥) 해야 하는 비료량(肥料量)과 수량구성요소(收量構成要素)와의 관계(關係)에 대(對)한 연구(硏究)는 필요(必要)한 것으로 간주된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.146-147
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• 2013

The oyster shells of about 240,000 tons have been annually produced in south coast of South Korea. However, about 25% of the oyster shells (60,000tons) was recycled as oyster seeding and fertilizer due to the limited amount of consumption for such purposes. The stored amount of oyster shell in the fertilizer manufacturing company is overfilled, and thus cannot accept any more of the waste oyster shells. As a result, landfill and illegal dumping of waste oyster shells have become an increasingly serious issue since 2011. In this research, the problems generated by the oyster shells were investigated through surveying activities. One of the possible alternative solutions that can process large amount of waste economically was found to be the application of oyster shells as a construction materials.

• 한국토양비료학회지
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• 제46권4호
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• pp.245-252
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• 2013

Leaf area index (LAI) is important in explaining the ability of crops to intercept solar energy for biomass production, amount of plant transpiration, and in understanding the impact of crop management practices on crop growth. This paper describes a procedure for estimating LAI as a function of image-derived vegetation indices from temporal series of RapidEye imagery obtained from 2010 to 2012 using empirical models in a rice plain in Seosan, Chungcheongnam-do. Rice plants were sampled every two weeks to investigate LAI, fresh and dry biomass from late May to early October. RapidEye images were taken from June to September every year and corrected geometrically and atmospherically to calculate normalized difference vegetation index (NDVI). Linear, exponential, and expolinear models were developed to relate temporal satellite NDVIs to measured LAI. The expolinear model provided more accurate results to predict LAI than linear or exponential models based on root mean square error. The LAI distribution was in strong agreement with the field measurements in terms of geographical variation and relative numerical values when RapidEye imagery was applied to expolinear model. The spatial trend of LAI corresponded with the variation in the vegetation growth condition.

• 한국작물학회지
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• 제60권3호
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• pp.333-337
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• 2015

이 실험은 녹비작물로 주로 이용되는 헤어리베치를 재배한 후 찰옥수수의 옥수수의 생육과 수량 특성을 알고자 실시하였다. 찰옥수수의 생육 특성은 관행재배에 비하여 헤어리베치를 녹비로 환원하고 질소시비량을 증가할수록 생육효과를 보였으며, LAI는 18 kg미만일 때 관행지배와 비슷하였다. 이삭 길이는 관행재배의 188 mm와 비교하여 헤어리베치를 녹비로 이용하고 질소시비량이 9 kg이하일 때 다소 감소하였으나 질소시비량이 18 kg 이상일 때 관행재배보다 길었다. 100립중은 헤어리베치와 27 kg의 질소시비량 처리가 35.4 g으로 가장 높았으며 헤어리베치와 0 kg의 질소시비량 처리가 27.4 g으로 가장 적었다. 수량은 헤어리베치와 9 kg의 질소시비량이 관행재배의 수량과 비슷하였으며, 당도는 관행재배에 비하여 헤어리베치와 18 kg 이상의 질소시비 처리에서 더 높았고, 과피 두께는 처리간에 차이를 볼 수 없었다.