• 한국유기농업학회지
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• 제28권4호
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• pp.615-626
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• 2020

하계사료작물로 케나프를 재배할 시에 유기 및 화학비료의 질소공급원과 수확시기를 달리하였을 때 케나프의 생산성과 양질의 조사료를 얻기 위해 적정 질소시용수준과 수확시기를 구명하고자 실시되었다. 질소공급원에 따른 케나프의 건물수량은 화학비료 처리 구가 다소 높았지만, 유기질비료를 ha 당 200~250 kg의 수준에서는 화학비료 처리 구와 유의한 차이가 인정되지 않았고 사료가치 특히 조단백질과 TDN 함량은 오히려 유기질비료 처리 구에서 유의하게 높게 나타나(p<0.05), 반추동물에게 양질의 조사료 공급원으로 이용하고자 케나프가 재배된다면 유기질비료가 화학비료를 대체할 수 있음을 시사하였다. 한편 수확시기에 따른 건물수량은 100일째가 다른 수확시기보다 유의하게 높았지만 100~110일 수확시기가 수량구성요인 중 잎의 비율이 줄기보다도 높았고 사료가치 중 조단백질과 TDN 함량이 다른 수확시기보다 높게 나타났으며 ADF와 NDF 함량은 크게 감소하였다(p<0.05). 본 연구의 결과 특히 건물수량과 사료가치를 비교해 볼 때 적절한 질소공급원으로 유기질비료를 시용 시에는 ha당 200~250 kg 정도가 적절하고 수확시기는 100~110일이 적합하다고 사료된다.

• 한국토양비료학회지
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• 제18권2호
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• pp.169-176
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• 1985

토양질소(土壤窒素)의 공급능력(供給能力)(유효도(有效度)) 검정방법(檢定方法)에 의한 밭토양의 비옥도(肥沃度) 평가(評價) 및 황색종연초(黃色種煙草)의 정적시비량(定適施肥量)을 추정(推定)하기 위하여 1982~1983년(年)에 23개소(個所)의 재배전(栽培前) 공시토양(供試土壤) 시료(試料)를 재료(材料)로 몇가지 토양검정치(土壤檢定値)에 의한 실내실험(室內實驗)과 이미 얻어진 무비구(無肥區) 건엽중(乾葉重)과의 상호관계(相互關係)를 검토(檢討)하였다. 토양(土壤)의 유효태질소(有效態窒素) 검정방법(檢定方法)으로서 본연구(本硏究)에서 사용(使用)된 a) 2주(週), b) 4주(週)동안의 항온(恒溫) 항습처리(恒濕處理)로 무기화(無機化)된 $NO_3-N$값, c) 0.01M-$NaHCO_3$ 침출물(浸出物)의 자외선(紫外線)(260nm) 흡광도(吸光度)값과 d) 동침출액(同浸出液)의 산분해(酸分解) 질소(窒素)값, e) 0.01M-$CaCl_2$ 용액(溶液)으로 자비(煮沸)하여 침출(浸出)한 질소(窒素)값과 f) 동용액(同溶液)으로 고온가압(高溫加壓) 침출(浸出)한 질소(窒素)값등의 모든 검정방법(檢定方法)이 무비구(無肥區)에서의 건엽중(乾葉中) 및 질소흡수량(窒素吸收量)과 밀접(密接)한 관계(關係)가 있었다. 따라서 유효태질소(有效態窒素) 토양검정결과(土壤檢定結果)로서 황색종연초(黃色種煙草)의 무비구(無肥區) 건엽중(乾葉中)의 추정(推定)은 물론, 토양비옥도(土壤肥沃度) 등급구분(等級區分) 및 적정시비량(適正施肥量) 추천범위(推薦範圍)의 산출(算出)도 가능(可能)하였다.

• 한국토양비료학회지
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• 제47권6호
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• pp.451-456
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• 2014

Organic amendment practices can influence diversity and activities of soil microorganisms. There is a need to investigate this impact compared with other types of materials. This study was carried out to evaluate the long term effects of chemical and organic fertilizer on soil microbial community in upland field. During the last 11 years green manure, rice straw compost, rapeseed cake, pig mature compost, NPK, and NPK + pig mature compost were treated in upland soil. Organic fertilizer treatment found with high bacterial colony forming units (CFUs) as compared to chemical and without fertilizer treatment. There was no significant difference in the actinomycetes and fungal population. The average well color development (AWCD) value was the highest in green manure and, the lowest in without fertilizer treatment. Analyses based on the denaturing gradient gel electrophoresis (DGGE) profile showed that rice straw compost and pig mature compost had a similar banding pattern while rapeseed cake, NPK, NPK + pig mature compost and without fertilizer treatment were clustered in another cluster and clearly distinguished from green manure treatment. Bacterial diversity can be highly increased by the application of organic fertilizer while chemical fertilizer had less impact. It can be concluded that green manure had a beneficial impact on soil microbial flora, while, the use of chemical fertilizer could affect the soil bacterial communities adversely.

• 한국토양비료학회지
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• 제49권5호
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• pp.409-419
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• 2016

With increasing social concerns for healthy food, the studies on the cultivation of crops to increase accumulation of functional metabolites in crops have been investigated. Accumulation of the metabolites in crops is highly affected by various types of stress, such as nutrient deficiency, water deficit (WD), extreme temperature and UV-B radiation as well as their own life cycle. This review summarizes the previous studies on the effects of environmental stresses, especially WD and UV-B radiation, on accumulation of functional metabolites in crops. UV-B radiation and WD during specific period (mainly at maturation stage) activates the adaptation and/or defense system in crops, thereby increasing biosynthesis of the metabolites. Although WD and UV-B radiation tend to decrease in crop yield, the decrease can be compensated by the production of high value crops having high content of functional metabolites.

• Environmental Engineering Research
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• 제21권1호
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• pp.29-35
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• 2016

This study evaluated the fertilizing value of struvite deposit recovered from swine wastewater in cultivating lettuce. Struvite deposit was compared to complex fertilizer, organic fertilizer and compost to evaluate the fertilizing effect of struvite deposit. Laboratory pot test showed that the struvite deposit better enhanced lettuce growth in comparison to commercial fertilizers. It was revealed that the growth rate of lettuce was simultaneously controlled by phosphorus (P) and magnesium (Mg). Moreover, nutrients such as nitrogen (N), P, K, calcium (Ca) and magnesium (Mg) were abundantly observed in the vegetable tissue of struvite pot. Meanwhile, struvite application led to the lower accumulation of mercury (Hg), lead (Pb), chromium ($Cr^{6+}$) and nickel (Ni). In addition, no detection of cadmium (Cd), arsenic (As) and nickel (Ni) in the lettuce tissue was observed in struvite application pots. The experimental results proved that the optimum struvite dosage for lettuce cultivation was 0.5 g struvite/kg soil. The column experiments clearly showed that ammonia nitrogen was more slowly released from struvite deposit than from complex fertilizer. Consequently, it was concluded that the struvite deposits recovered from swine wastewater were effective as a multi-nutrient fertilizer for lettuce cultivation.

• Plant Resources
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• 제8권3호
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• pp.281-285
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• 2005

In order to select suitable fertilizer level and sowing rate of Dangyo $^{#8}$(hybrid) rapeseed at the southern area of Korea, two varieties of Naehanyuchae (Normal) and Dangyo $^{#8}$(hybrid) rapeseed currently grown for oil production by two fertilizer level with 10-8-8 kg/10a and 15-8-8 kg/10a and three sowing rate with 500 g/10a, 1,000g/10a and 1,500g/10a with relatively high yield was grown at the same condition yield and yield components were observed. Dangyo $^{#8}$(hybrid) rapeseed was superior to oil-eed rapeseed for yield at the 15-8-8 kg/10a of fertilizer and 1,500 g/10a of sowing rate. Fertilizer level, $N-P_{2}O_5-K_{2}O$ = 15-8-8 kg/10a and sowing rate, 1,500 g/10a showed somewhat higher value in two varieties of Naehanyuchae(Normal) and Dangyo $^{#8}$(hybrid).

• 한국어병학회지
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• 제33권1호
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• pp.97-101
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• 2020

Although aquaculture production rates grown over the years, aquatic animal diseases occur every year which causes substantial economic losses. When an aquatic animal is infected with an aquatic animal pathogen it is either incinerated or buried according to the aquatic life disease control act. Although these methods prevent the spread of disease, it is not environment friendly. Here, we developed an aquatic animal rendering equipment for disposal of fish waste which is environment-friendly and efficient. Also, fertilizer components of fish waste were evaluated value for recycling. The mobile rendering equipment was designed for field operation and/or high temperature and pressure system, oil and water separator, and shredding drying apparatus. During the experiment (July-2016 to November-2016), a total of 53,824 kg fish waste was collected, and 29,216 kg compost of rendering by-product was made. Also, compost made from viral (Viral hemorrhagic septicemia virus) infected fish did not reflect any detectable pathogen. The concentration of nitrogen, phosphorus, and organic matter in the fish waste compost were 2.17%, 26.98%, and 92.44%, respectively. The results suggest that fish waste used in this study was decomposed efficiently as per the official standard for fertilizer product. This equipment can be useful for efficient inactivation of the aquatic animal pathogenic agents and recycling of the fish waste in an environment-friendly manner.

• 한국초지조사료학회지
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• 제20권1호
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• pp.41-48
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• 2000

This study was conducted to investigate the effects of the application rate of fermented swine manure and additional mineral fertilizer on productivity and nutritive value of corn(Zea mays L.) for silage. Swine manures used in this study were the compost of swine manure fermented with sawdust(SMFWS) and swine sluny(SS). This study was arranged in split-split plot design. Main plots were the types of swine manure, subplots were the application rate of swine manure, such as 100, 200 and 400kgN/ha, and sub-subplots were the application rate of mineral fertilizer, such as 50 and 100kgNiha. Corn DM(dry matter) and TDN(tota1 digestible nutrient) yields increased as application rate of SMFWS and SS increased. DM and TDN yields in SS treatments were higher than those in SMFWS treatments. The effect of fermented swine manure improved positively as application rate of urea increased. Net energy for lactation(NE1) and TDN content in corn decreased as application rate of SMFWS and SS increased, but crude protein(CP) content increased by the application of SMFWS and SS. NE, and TDN contents in SMFWS treatments were lower than those in SS treatments, but CP content in SMFWS was higher than that in SS. The growth and nutritive value of corn were improved by the application of mineral fertilizer. (Key words : Swine manure, Swine sluury, Compost, Zea may, TDN, Net energy)

• 한국수산과학회지
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• 제30권2호
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• pp.313-318
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• 1997

Chitosan을 이용한 capsule형 비료 및 제초제의 제조조건과 capsule의 투과량을 조절하여 산업적이용을 위한 기초자료를 제시할 목적으로 염농도, chitosan농도, 분자량의 영향을 조사한 결과는 다음과 같다. 염농도의 영향은 염을 첨가하지 않은 경우 capsule이 형성되었으나 capsule강도를 측정할 수 없었고, 0.3M일 때 가장 높은 capsule강도 $(20g/cm^2)$를 나타내었다. 비료 및 제초제투과량에 있어서 염농도가 증가함에 따라 투과량이 증가하였고 0.75M 경우 각각 $88\%,\;87\%$로 가장 높았다. Chitosan농도의 경우 chitosan농도가 증가함에 따라 비료 및 제초제투과량이 감소하였으며, $0.25\%$ chitosan은 $90.3\%,\;90.8\%$로 가장 투과량이 높았고 $1\%$ chitosan은 $85\%,\;83\%$로 투과량이 가장 낮았다. 초음파 처리시간에 따른 분자량의 변화는 120분까지는 감소속도가 빨랐으나 120분 이후부터는 감소속도가 둔화하여 120분의 경우 분자량은 125,000, 180분는 119,000이었다. 비료에 있어서 분자량이 330,000, 293,000 및 236,000일때 투과도는 각각 $86\%,\;78\%$ 및 $76\%$이었고 174,000, 125,000 및 119,000일 때 투과량은 각각 $70\%,\;60\%$ 및 $52\%$ 이었다. 제초제에 있어서 분자량이 330,000, 293,000 및 236,000의 투과도는 $83\%,\;77\%$ 및 $76\%$이었고 174,000, 125,000 및 119,000의 경우 투과도는 $69\%,\;60\%$ 및 $51\%$ 이었다. Capsule을 제조하여 건조한 후 다시 탈이온수에 침지했을 때 외형에 있어서는 거의 차이를 보이지 않았다. 조제한 그대로의 capsule과 건조후 복원시진 capsule 강도는 $20g/cm^2$와 $17g/cm^2$로 건조후 복원시킨 것이 다소 capsule강도가 떨어졌으며 비료 및 제초제투과량에 있어서는 조제한 그대로의 capsule 경우 침지 6시간까지 $57\%,\;60\%$ 건조후 복원시킨 것은 $40\%,\;52\%$의 투과량을 보여 투과도에 있어서는 조제한 그대로의 capsule이 빠른 것으로 나타났다.

• 한국토양비료학회지
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• 제50권1호
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• pp.65-70
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• 2017

Soil was regarded as infinite resources but recently, soil is considered as invaluable resources that we need to protect and conserve. Main objective of this research was to evaluate soil value in terms of soil carbon contents. Soil was classified into forest, paddy, upland, and grass. Carbon contents in each soil was calculated based on soil chemical properties. Calculated soil carbon contents was ranged $15.31-108.86mg\;kg^{-1}$. Based on soil carbon contents, soil value was assumed adapting economic concepts. Calculated total soil value based on soil carbon contents was about 18.46 trillion won. Among others, carbon contents in forest was the highest and value was assumed 11.95 trillion won followed by paddy field (3.7 trillion won).