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Volume 43 (2012)
- Issue 4 Pages 123-
- Issue 3 Pages 83-
- Issue 1+2 Pages 1-
Volume 43, Issue 1+2
Vol. 43, No. 1, 2 (Ser. No. 133)
Displaying 1-5 of 5 articles from this issue
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Takashi SUZUKI, Shinji Hoshiba, Hitoshi OGAWA, Hirotoshi Takazaki, Eir ...2012 Volume 43 Issue 1+2 Pages 1-7
Published: 2012
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSIn order to use biogas effectively, effisient desulfurization system is required. Especially, it is thought that biological desulfurization using microbes in digested slurry (mathane fermented slurry) is effective and economical. However, many a detailed examination on the capability and design specification for biological desulfurization using dairy manure have not been reported. The objectives of this study were to clarify the capability of a model equipment by ventilation load test and to consider the design specification of a real scale equipumnt.Moreover, the real scale equipment was made based on the capability in the model equipment, and verified if whole gas from a practically running biogas plant can be treated. The 0.24 m-3 reaction pipe made of PVC was used as an experimental equipment, and carriers were filled inside. The digested slurry was sprayed into the equipment upward by a nozzle using a pump, and was exchenged fresh sluurry for ten percent per day so that the influence of desulfurization efficiency might not to be caused by repeated use of slurry. When treating at target efficiency with the model equipment having 4.0 m-3 in volume and supplying whole gas from the real scale biogas plant, it was thought that the target efficiency could be obtained sufficiently if operating by suitable temperature conditoins.View full abstractDownload PDF (1070K) -
Naoto IWASAKI, Hiroyuki HAGIWARA, Naoto YASUDA, Takuo ONO2012 Volume 43 Issue 1+2 Pages 8-14
Published: 2012
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSEffects of atmospheric relative humidity during deficit soil water treatment on water stress of the trees and the number of first-flush flowers were investigated in order to establish the production system using first flush flowers in Meiwa kumquat (Fortunella crassifolia Swingle). Ten- and 20-day treatments of water stress about 30 % of soil water content increased first-flush flowers compared with that in non-treated control. However, there was no difference in the number of first-flush flowers between treatment of low atmospheric relative humidity solely and control, while it was increased significantly in combined treatment of water stress and low atmospheric relative humidity. The total number of first- and second-flush flowers in treatment of low atmospheric relative humidity solely was 113.3, which was tended to increase in comparison with that in control. These results suggested that combined treatment of deficit soil water and low atmospheric relative humidity is amplified the effect of water stress in increasing the number of first-flush flowers.View full abstractDownload PDF (991K) -
Gou NOGUCHI, Daisuke AKASAKA, Mariko MIYABE, Satoshi MIKAWA, Naohiko ...2012 Volume 43 Issue 1+2 Pages 15-23
Published: 2012
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSSeveral characteristics including the fatty acid composition of body fat, grade of carcass, meat quality and daily gain in weight of pigs with different numbers of vertebrae were compared using 310 three-way cross hybrid pigs. The same characteristics in the genotype classification of recently identified vertebral number-associated genes (vertnin:VRTM) were also compared. The incidence of 20 vertebrae (Type 20) was 11 %, 21 vertebrae (Type 21) 66 % and 22 vertebrae (Type 22) 23 %. The Type 22 carcass was longer, had a smaller eye muscle area and had a higher percentage of loin and belly mass than Type 20 and 21. The analysis of meat toughness revealed Type 22 was tenderer than the other types. Additionally, Type 22 pigs seemed to have a better daily weight gain. Fatty acid composition of backfat was not affected by the number of vertebrae. In this study, we also investigated the relationship between VRTN genotype and number of vertebrae. The wild-type (Wt/W) pigs had 20 and 21 vertebrae with an average number of vertebrae of 20.4. Hetero-type (Wt/Q: number-increase allele) pigs had 20, 21 and 22 vertebrae and average number of vertebrae of 21.0. Increase type (Q/Q) pigs had 21 and 22 vertebrae and average number of vertebrae of 21.7. These results suggest that estimation of the number of vertebrae is possible by analyzing the VRTN genotype. The fatty acid composition, grade of the carcass and meat quality in the genotype-classified pigs showed similar results as the vertebral number. Therefore, selection of demanded-pork meat for production may be possible by genotyping the VRTN gene.View full abstractDownload PDF (838K) -
Taku KATO, Baoming SHEN, Futoshi HAYASHI, Fumihito MIYATAKE, Masanori ...2012 Volume 43 Issue 1+2 Pages 33-40
Published: 2012
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSThis study aimed to clarifying about distribution of application amounts of fertilizer ingredient in cow-wheat straw composts on large scale felds.The experiments carried out at three farmer's fields in Tokachi district,Hokkaido.Cow-wheat straw compost was broadcasted using manure spreader,and compost application rates and amounts of N,P2O5 and K2O of compost per square meter were measured.Variation coefficients of compost application rates were 57.8-63.9%.Amount of N of compost had difference of 7-21 times.The differences of P2O5 and K2O were 7-22 times and 8-23 times as well as amount of N including compost.From the above results,it was cleared that the very heterogeneous distribution of amounts of fertilizer ingredients in cow-wheat straw compost in a field was shown.Change of amounts of fertilizer ingredient in cow-wheat straw compost was specified to compost application rate.And it was suggested that compost application rate is influenced of water content and C/N ratio of composts.Equalization of amounts of fertilizer ingredient in cow-wheat straw compost is one of the important agricultural technologies to the stabilization of the crop production in cultivation.In order to solve the problem of heterogeneous of compost application rates,it was considered that the valuation basis of the physio-chemical property of compost decides is necessity.View full abstractDownload PDF (1460K) -
Fumihito MIYATAKE, Yasuhiro SUZUKI, Masayuki TANI, Taku KATO, Kouki MA ...2012 Volume 43 Issue 1+2 Pages 41-48
Published: 2012
Released on J-STAGE: September 07, 2023
JOURNAL OPEN ACCESSIn order to clarify the effect of recycled compost on nitrous oxide(N2O)emission in the early stage of dairy and horse manure composting, N2O emission rate was investigated with a laboratory-scale composting device. N2O emission rate rose remarkably by mixing of compost material with recycled compost before the early stage of composting.Also, the amount of N2O emission increased significantly, increasing by maximum of 26 times at dairy manure composting and maximum of 885 times at horse manure composting compared with no mix of recycled compost. High concentration of nitrate nitrogen (NO3--N) or nitrite nitrogen (NO2--N) which is a source of N2O generation was observed at mixture of recycled compost, suggesting that the accumulation of NO3--N or NO2--N nitrogen caused the rise of N2O emission rate.View full abstractDownload PDF (1547K)
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