• Title, Summary, Keyword: Liquid fertilizer

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Chemical Composition and Heavy Metal Contents in Commercial Liquid Pig Manures (국내유통 돈분액비의 화학성 및 중금속 함량)

  • Lee, Ji-Ho;Go, Woo-Ri;Kunhikrishnan, Anitha;Yoo, Ji-Hyock;Kim, Ji-Young;Kim, Won-Il
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.6
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    • pp.1085-1088
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    • 2011
  • Heavy metal concentration as well as chemical composition were surveyed in commercial liquid pig manure to provide the basic information for mitigation research of hazardous material to agro-product. Seventy-five samples of liquid pig manure were collected and analyzed from 2009 to 2010 nationwide. Average contents of T-N, $P_2O_5$, and $K_2O$ were 0.29%, 0.08%, and 0.11%, respectively. The contents of heavy metals ranged from 0.001~0.083 for As, 0.001~0.108 for Cd, 0.002~0.495 for Cr, 0.07~47.8 for Cu, ND~0.005 for Hg, 0.035~1.033 for Ni, ND~0.291 for Pb, and $0.75{\sim}342.4mg\;L^{-1}$ for Zn, respectively. It was noted that among 75 samples, only four samples exceeded the Zn guideline ($130mg\;L^{-1}$) of liquid fertilizer derived from livestock manure but others were not exceeded the regulation.

Applications of Agro-Based Materials for Water Dropwort (Oenanthe stolonifera DC) Organic Farming (미나리 유기재배를 위한 활용자재 시용효과)

  • Ahn, Byung-Koo;Moon, Young-Hun;Kwon, Young-Rip;Lee, Jin-Ho
    • Korean Journal of Organic Agriculture
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    • v.18 no.1
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    • pp.83-92
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    • 2010
  • Organic farming is a type of agricultural practices based on naturally occurring processes excluding or strictly limiting the use of synthetic fertilizers, pesticides, and other chemicals. This study was conducted to investigate the influences of agro-based materials, effective microorganisms (EM), liquid silicate (LS), and organic liquid fertilizer (OLF) for water dropwort (Oenanthe stolonifera DC.) cultivation. Soil pH, soil organic matter, and plant available phosphorous decreased with LS application. Exchangeable Ca and Mg decreased with EM application, and electrical conductivity and exchangeable Ca and K decreased with OLF application. Most of essential nutrient contents in water dropwort were reduced with the treatments of LS, EM, and OLF as compared with those in control plot, except nitrogen and phosphorus. However, diseases and insect pests were almost not observed in the water dropwort in the agro-based material application plots, except cluster caterpillar (Spodoptera litura). Productivity of water dropwort tended to be reduced: its higher productivity in the OLF and EM+LS plots and lower in the LS and control plots.

Comparison of Liquefying Efficiency of Mixed Organic Fertilizer as Affected by Aeration Time and the Ratio of Organic Fertilizer to Water (폭기시간과 유기질비료 농도에 따른 혼합유기질비료의 액비화 특성비교)

  • Lee, Jong-Tae;Ha, In-Jong;Moon, Jin-Seong;Song, Won-Doo
    • Korean Journal of Soil Science and Fertilizer
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    • v.40 no.2
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    • pp.156-163
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    • 2007
  • This study was conducted to evaluate the liquefying efficiency of mixed organic fertilizer in different conditions. The organic fertilizer was composed of sesame oil cake, rice bran, fish meal, ground bone meal etc, and made by fermenting process. It included $23g\;kg^{-1}$, $17.0g\;kg^{-1}$, $23.9g\;kg^{-1}$, $290g\;kg^{-1}$ of N, $P_2O_5$, $K_2O$, organic matter, respectively. In one test, the mixed organic fertilizer was added in the proportion of 10% to water 90% and aerated continuously, for 2, 8 hours per day, and not aerated as control. In the other test, ratios of organic fertilizer to water were 5%, 10%, 20% and aerated for 2 hours a day. With the increase of liquefying time, pH, EC and $NH_4-N$ increased without relation to aeration time. After 10 days, liquid organic fertilizer aerated for 2 hours a day contained $634mg\;N\;kg^{-1}$, $68.1mg\;P_2O_5\;kg^{-1}$, $453mg\;K_2O\;kg^{-1}$, which was not significantly different from 8 hours a day or continuous aeration. Then extraction ratios of inorganic contents were 27.6%, 4.0% and 18.9%, respectively. Continuous aeration resulted in increasing the viable number of aerobic bacteria, spore forming bacteria and fungi in liquefied solution. Higher ratio of organic fertilizer to water increased EC, $NH_4-N$ and other inorganic matter contents, but decreased extraction ratio of nutrients in liquid fertilizer. The liquid organic fertilizer of 20% contained $1,140mg\;N\;kg^{-1}$, $35.4mg\;P_2O_5\;kg^{-1}$, $544mg\;K_2O\;kg^{-1}$ after 10 days. Then extraction ratios were 24.8%, 2.4% and 13.6%, respectively. The ratio of organic fertilizer to water was positively correlated with only spore forming bacteria, Pseudomonas spp. among microorganisms.

Isolation and Characterization of Phosphorus Accumulating Microorganisms under Liquid Fertilization of Swine Slurry (액비화 과정 중 인 이용 우수미생물 분리 및 특성)

  • Lim, Joung-Soo;Cho, Sung-Back;Hwang, Ok-Hwa;Yang, Seung-Hak
    • Journal of Animal Environmental Science
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    • v.20 no.2
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    • pp.77-84
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    • 2014
  • This study was conducted to investigate the bacterial capability to accumulate phosphorus during liquid composting process of pig slurry. Storage liquid compost and pig slurry were analyzed by using MALDI-TOF technique, which showed the colonies of Acinetobacter towneri and Bacillus licheniformis. In addition, bacterial colonies were isolated under high phosphoric acid conditions using X-phosphate MOPS medium with the addition of 2 mM $K_2HPO_4$. Microbial growth was observed in high and low phosphoric conditions due to the growth of bacterial diversities in the liquid fertilizer and slurry. The colonies isolated in the high phosphoric acid medium were uncultured bacterium clone and Acinetobacter sp. were identified by analysis of 16S rRNA gene sequences. Uncultured bacterium showed higher growth rate and excellent phosphorus ability then Acinetobacter sp.. In addition to Paenibacillus sp. AEY-1 isolated from pig slurry performed excellent phosphorus utilizing capability.

Cutting Frequency and Liquid Manure Application on Green Manure Production of Rye and Hairy Vetch in Pear Orchard

  • Lee, Seong Eun;Park, Jin Myeon;Noh, Jae Seung;Lim, Tae Jun;Choi, Dong Geun
    • Korean Journal of Soil Science and Fertilizer
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    • v.46 no.5
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    • pp.322-326
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    • 2013
  • Many organic fruit growers adopt cover cropping in their orchards to improve soil properties. A field experiment was conducted to determine the effects of cutting frequency of cover crop (CF) and liquid manure application (LM) on green manure production (GMP) and returnable nutrient content (RNC) in pear orchard. The combined effects of CF and LM were tested at two levels, respectively, with liquid manure ($L_1$) and without liquid manure ($L_0$). After that, cover crops were cut once ($C_1$) and three times ($C_3$) in rye, and twice ($C_2$) and four times ($C_4$) in hairy vetch. The result showed that main factors related to green manure production were different depending on the species. In rye, LM was more effective in increasing the dry weight of cover crop and RNC than CF. In contrast, the parameters were more affected by CF rather than LM in hairy vetch. Thus, it is suggested that different management technique is needed depending on the cover crop species in order to maximize the green manure production in pear orchard.

Juvenile Growth Characteristics of Fast Growing Tree Species Treated with Liquid Pig Manure (양돈분뇨 처리에 따른 속성수의 유시 생육특성)

  • Kim, Hyun-Chul;Yeo, Jin-Kie;Koo, Yeong-Bon;Park, Jung-Hyun;Baik, Eul-Sun
    • Korean Journal of Soil Science and Fertilizer
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    • v.42 no.5
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    • pp.323-329
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    • 2009
  • This study was conducted to analyze growth responses of fast growing tree species(8 clones of hybrid poplars, Salix alba, Metasequoia glyptostroboides, Liriodendron tulipifera, Acer okamotoanum, and Quercus palustris), the chemical characteristics of soil and $NO_3-N$ concentration of groundwater in a plantation applied with liquid pig manure. Concentrations of nitrogen and phosphorous in the soil treated with liquid pig manure were higher than that of the soil treated without liquid pig manure. With the exception of S. alba, DBH(Diameter at Breast Height) growth of all the fast growing tree species treated with liquid pig manure was higher than that of the species treated without liquid pig manure. In liquid pig manure treatment group, P. euramericana 'Eco28' clone showed the best performance in height and DBH growth. Concentration of nitrogen in the leaf with liquid pig manure was higher than that of the leaf treated without liquid pig manure. Based on the $NO_3-N$ concentration of groundwater analyzed during the experimental period, there was no evidence that groundwater was polluted by the liquid pig manure applied at the plantation.

Effect of SCB Liquid Manure Application in Pear Orchard Managed by Cover Crop System on Tree Growth, Potential Nutrient Recovery and Soil Physicochemical Properties (녹비작물 재배 시 SCB 액비 혼용이 배나무 생육 및 양분 환원 가능량, 토양 물리화학성에 미치는 영향)

  • Lee, Seong-Eun;Park, Jin-Myeon;Choi, Dong-Geun
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.5
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    • pp.779-786
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    • 2012
  • Many farmers have been seeking alternatives to chemical fertilizer for successful organic fruit production. This experiment was carried out to investigate the replaceability of chemical fertilizer by cover crop and slurry composting biofiltration (SCB) liquid manure (LM) application in pear orchard. Three treatments were contained in this experiment; cover crop only and cover crop + LM treatment, and control (chemical fertilizer application). Dry weight and mineral contents of gramineous cover crops were significantly increased in LM-combined treatments than that of leguminous species. Bulk density of soil was decreased in rye + LM and hairy vetch + LM treatments, compared with each cover crop treatment. Soil pH was lowest in fertilizer treatment and soil nitrate content became similar between treatments after rainy season. Available soil phosphate was lower in cover crop and cover crop + LM treatmemts than control, but exchangeable Mg was higher. The mineral content and net assimilation rate of leaves showed no difference between the treatments. As a result, it is suggested that the application of SCB liquid manure in pear orchard managed by cover crops is desirable to maintain the productivity by improving soil physical properties and potential nutrient recovery.

Effects of Two Amino Acid Fertilizers on Growth of Creeping Bentgrass and Nitrogen Uptake (아미노산 비료가 크리핑 벤트그래스의 생육과 질소 흡수에 미치는 영향)

  • Kim, Young-Sun;Ham, Suon-Kyu;Lee, Jae-Pil;Hwang, Young-Soo;Lee, Kyu-Seong
    • Weed & Turfgrass Science
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    • v.3 no.3
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    • pp.246-252
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    • 2014
  • This study was conducted to evaluate the effects of two amino acid fertilizers on the growth of creeping bentgrass and N uptake. Fertilizer treatments were designed as follows; non-fertilizer (NF), control (CF), recommended amount (ALF), double amount (2ALF) of amino acid liquid fertilizer (AaLF), recommended amount (ASLF) and double amount (2ASLF) of amino acid liquid fertilizer contained with saponin (AaSLF). Turf quality of treatments of AaLF and AaSLF such as turf color index, chlorophyll index and root length was similar to the treatment of CF. Dry weight and content, uptake and availability of N were investigated highest in the 2ALF and 2ASLF. These results suggested that foliar application of AaLF and AaSLF was enhanced turf quality and growth of creeping bentgrass by stimulating uptake and availability of N.

Inactivation of Escherichia coli in Surface Water of Saturated Soil with the Pig Manure-based Liquid Fertilizers by Ultraviolet Radiation (자외선에 의한 가축분뇨 액비 시용 논 표면수 중 대장균 사멸율 변화)

  • Kim, Min-Kyeong;Jung, Goo-Bok;Hong, Seung-Chang;Kang, Seong-Soo;Kwon, Soon-Ik
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.3
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    • pp.368-370
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    • 2011
  • Liquid manure fertilizer drived from pig slurry is a valuable source of nutrients for crop production. However, there is no study for environmental assessment regarding microbial quality to apply liquid manure fertilizer. Therefore, this study aimed at quantifying the level of environmental impact on fecal coliform (Escherichia coli or E. coli ) survival in saturated soil such as paddy field. Surface water samples were collected up to 168 and 11 hours under natural sunlight and artificial ultraviolet radiation, respectively. The inactivation rate of E. coli under natural sunlight increased gradually after 48 hours. However, the inactivation rate of E. coli under artificial ultraviolet radiation increased linearly over time. Our findings suggested that the ultraviolet radiation is the limited factor on E. coli survival in surface water of saturated soil. This result will provide useful and practical guideline to applicators of agricultural soil in deciding appropriate handling and time frames for preventing pollution of water quality for sustainable agriculture.

The Yield and Economical Efficiency by Application Methods of Liquid Pig Manure on Forage Crops

  • Ahn, Chang-Hyun;Kim, Woo-Sik;Park, Jee-Sung;Ahn, In
    • Korean Journal of Soil Science and Fertilizer
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    • v.46 no.6
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    • pp.563-569
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    • 2013
  • This experiment was carried out to investigate the effect of liquid-pig-manure application method (Tr.1: surface appl. LPM 150%, Tr.2: surface appl. LPM 50% + LPM 50%, Tr.3: chemical fertilizer, Tr.4: soil injection LPM 150%, Tr.5: soil injection LPM 50% + surface appl. 50%, Tr.6: no fertilizer) and the economic efficiency of yield on forage crops cultivaion. In barley cultivation experiment, Tr.5 was found to be best, showing the yield of 1,462 kg $10a^{-1}$, and followed by Tr.2(1,226 kg $10a^{-1}$), Tr.3(1,226 kg $10a^{-1}$), Tr.4(1,225 kg $10a^{-1}$) and Tr.1(1,209 kg $10a^{-1}$) in order. In maize cultivation experiment, Tr.4 was found to be best, showing the yield of 2,142 kg/10a, and followed by Tr.1(2,125 kg $10a^{-1}$), Tr.3(2,024 kg $10a^{-1}$), Tr.5(2,011 kg $10a^{-1}$) and Tr.2(1,925 kg 1$10a^{-1}$) in order. The income was showing 1,274,000 ~ 1,591,000 Won $10a^{-1}$ in barley, whereas 766,000-794,000 Won 1$10a^{-1}$ in maize. There was more economical efficiency in barley cultivation than maize cultivation. Rather than the LPM surface application, LPM soil injection was more effective.