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Volume 42 (2007)
- Issue 4 Pages 189-
- Issue 3 Pages 173-
- Issue 2 Pages 69-
- Issue 1 Pages 4-
Volume 42, Issue 4
Displaying 1-3 of 3 articles from this issue
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Original Papers
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Seishu TOJO, Shiho OCHIAI, Haruo TANAKA, Sohzoh SUZUKI, Kengo WATANABE2007 Volume 42 Issue 4 Pages 189-198
Published: December 25, 2007
Released on J-STAGE: March 31, 2009
JOURNAL FREE ACCESSRecently there has been promotion of the recycling of various kinds of organic wastes after their recovery. Excess amounts of recycled organic materials are often applied to fields because the decomposition and mineralization go on very slowly and little effect appears in terms of nutrients for crops. In this paper, for various recycled organic materials, an evaluation and representation method are described to show comprehensively, through crop cultivation tests and the analysis of components, the features and properties obtained. As recycled organic material test fertilizers, cattle excrement compost, sludge compost and sludge pyrolysate were compared with ordinary chemical fertilizer. In terms of nutrient rate of application in the cultivation test plots, 1 times to 4 times the rate of nitrogen were set for each test fertilizer, on the standard basis of chemical fertilizers of Kanto district, considering the degradation rate and the fertilizer effect. The nutrient components of harvested crops and remaining growth soil were analyzed with a standard chemical method. The map of principal component scores by principal component analysis shows the effect of the trial fertilizer. Utilization of the self-organizing map presented more visually the similarities and tendencies of the recycled organic materials on crop cultivation and environmental loading.View full abstractDownload PDF (613K) -
Kazunori ISHIKAWA, Tadashi BABA2007 Volume 42 Issue 4 Pages 199-204
Published: December 25, 2007
Released on J-STAGE: March 31, 2009
JOURNAL FREE ACCESSScions of highbush blueberry cultivar ‘Jersey’ and ‘Spartan’ were grafted on rootstocks of rabbiteye blueberry cultivar ‘Tifblue’ to determine the effects of rootstock diameter (4, 6 and 8mm) on the successful union, rooting and growth of grafts.
1) Current shoots of the thinner rootstocks terminated earlier. The thicker rootstocks showed earlier resprouting.
2) ‘Jersey’ scions grafted on 6- or 8-mm-diameter of ‘Tifblue’ rootstocks had long, vigorous and heavy current shoots.
3) The rate of rooting was higher in ‘Jersey’ scions grafted on 6- or 8-mm-diameter ‘Tifblue’ rootstocks. The plants of ‘Spartan’ scions grafted on ‘Tifblue’ rootstocks showed a lower rate of successful union and formed callous tissue at the end of the cutting.
4) Grafts by grafted cuttings required a nursery period of more than 3 months, which is sufficient for ungrafted cuttings to root.
In conclusion, grafted highbush blueberry plants on 6-mm-diameter rabbiteye rootstocks tended to perform better for the successful union and growth of grafts.View full abstractDownload PDF (694K)
Research Paper
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Kazunori ISHIKAWA, Tadashi BABA2007 Volume 42 Issue 4 Pages 205-212
Published: December 25, 2007
Released on J-STAGE: March 31, 2009
JOURNAL FREE ACCESSInter- and intraspecific blueberry grafting by grafted cutting was conducted to determine the effects of stock-scion combination and timing of grafting on successful union, rooting and growth of grafts.
1. In a trial grafting highbush cultivar ‘Berkeley’ scions on to four different rootstocks, rabbiteye cultivars ‘Homebell’ and ‘Woodard’ and highbush cultivars ‘Jersey’ and ‘Spartan’, successful union was greater than 70%. However, grafting ‘Spartan’ scions on to ‘Spartan’ rootstocks gave only 37% successful union. Among tested combinations, the rate of rooting was significantly higher in ‘Jersey’ rootstock, and the length of current shoots was significantly shorter in ‘Woodard’ rootstock. Current shoots of all tested stock-scion combinations terminated until late April and resprouted from mid May.
2. Although the rate of rooting was low for the combination of highbush cultivar ‘Spartan’ scions grafted on to rabbiteye cultivar ‘Homebell’, the storage period after grafting and the time of cutting back of rootstock base influenced the rate of successful union : grafts grafted in mid January with cutting back of rootstock base, and storage in a refrigerator for 2 months had better rates of successful union than grafts grafted in February and March and storage in a refrigerator for a month and several days, respectively.
In conclusion, all tested combinations except ‘Spartan’ scions grafted on ‘Spartan’ were successfully intergrafted by grafted cutting, and the grafts grafted with cutting back of rootstock base in mid January and storage in a refrigerator for 2 months gave the best successful union results.View full abstractDownload PDF (847K)
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