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Volume 32 (1968 - 196･･･
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Volume 32, Issue 3
Displaying 1-4 of 4 articles from this issue
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On Recreational Tour Habitation for Natural Greens of Osaka Prefecture's CitizensKimio KONDO, Michiko NAKADA, Michiko MATSUNO1968 Volume 32 Issue 3 Pages 2-6,18
Published: December 29, 1968
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSResults of this study to research the foundation for natural parkplans are below mentioned.
From the relation between recreation tours and income, such are appointed that families of less 1 million yens income have less 8 times recreation tours with 8, 000 yens of above recreational consume in mean, and families of 1.0 to 1.5 million yens income have about 9 times tours with less 9, 000 yens of this consume, etc.
This means the existence of certain functional relation between income and these tours.
Besides above, it is appointed that living envioronmental problem such as population density, leisure time, satisfactory for their outdoor living spaces have also such relations.
The fact that not satisfacted citizens on their living surroundings, have constant times of recreational tour independently with the it income, is a characteristic phenomena.
On this researching analyse, sourrounding resorts are defined 8 groups: the visiting times tendency of them also shows a possibility to apply a rule of recreational effective ratio functions, on their relations between the distance and visiting times.View full abstractDownload PDF (804K) -
Hiroshi YOSHIOKA1968 Volume 32 Issue 3 Pages 7-13
Published: December 29, 1968
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThe experiments were tried to find the some rational methods which would prevent the transplanting trees from sun-scalded injuries and make the growth better.
Cinnamomum camphora, Zelkova serrata and Prunus donarium var. spontanea were used in this experiments.
After transplanting, we measured the tree temperature (cambium temperature) with the thermocouple, and water contents of cortical tissues by dry weight method.
We tried to find out the lethal tree temperature, and direction and time which sun-scalded injuries occurred.
We also tried to find out the relation between the lethal tree temperature and the water contents, solar radiation and air temperature.
1. The tree temperature of transplanting trees is higher than non-transplanting.
2. Solar radiation and air temperature are more imp ortant factors which influence the tree temperature.
3. High temperature is recorded on the south-west and west side at 14: 00-16: 00 o'clock during the time the late in July to the beginning of September.
4. The tree temperature is different according to the height of measuring spot from the ground and the direction of boughs.
5. The lethal temperature of Cinnamomum camphora is between 52 and 55°C in dark brown bark of trunk at the height of 1. 5m (φ9cm), and in green parts at the height of 1.0m (φ3cm), 42-45°C is lethal. But in the part of the trunk at the height of 0.2m (φ14cm) where the cork layer develops well, the tree temperature of 55-57°C is not lethal.
6. The heigher the tree temperature becomes, the lower the water contents of the cortical tissues becomes,
7. The trunkcovering with rice straw, cheese cloth and reed, and white washing kept the tree temperature considerably lower, and somewhat steadier, than non-trunkcovering trees, and prevent deterioration of the cortical tissues.
It is important to shade from the burning sun.View full abstractDownload PDF (997K) -
Rikio TAKAHASHI, Takaya OSAWA, Osamu SHAKUDO, Iwao SUGAWARA1968 Volume 32 Issue 3 Pages 14-18
Published: December 29, 1968
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESS1. A survey was made in 1966 in order to investigate the relationship between sulfur content in leaves of several species of trees and sulfur dioxide concentration in the atmosphere in Osaka region.
2. Leaves of cherry, ginkgo, viburnum, camphor tree and Japanese black pine were sampled for determination of sulfur content at seven places in Osaka city and five places in suburban area in May and September.
3. Sulfur was accumulated in leaves as the season advanced, and the accumulation was apparently higher in Osaka city (Polluted area) than in suburban area (Iess polluted, clean area).
4. With each species, the average of sulfur content in leaves sampled in Osaka city was higher than that in the suburbs.
5. Heavily polluted areas in Osaka city showed considerably high content of sulfur in leaves, for instance in the case of ginkgo above 1.5 per cent in September, while clean suburban area like Kawachi-Nagano city showed much lower value.
6. From these results, sulfur content in leaves of trees seems to be closely related to sulfur dioxide concentration in the atmosphere. It may be desirable to keep strict and continuous watch over harmful effects of air pollution on vegetetion in polluted area like Osaka city.View full abstractDownload PDF (686K) -
Fundamental study on the planting and space effects in the public nuisance prevention in the city. IEffects of open space on the dust prevention in the cityHitoshi HONDA1968 Volume 32 Issue 3 Pages 19-24
Published: December 29, 1968
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSIn order to find out the interception or catching effects of park anb open space in the air pollution in the city, particularly in dust accumulation, the author investigated the distribution of dust amounts on the leaves of trees planted in the inner and outer Imperial Gardens, located in the center of Tokyo and condition of dust fixing on leaves of Pinus thunbergii.
1) Amounts of dusts accmulated on the tree leaves decreased as proceeds to the inner parts of Imperial Garden, decreasing to about 1/40 in amounts. This suggests that the extension of open space (space effects) and covering layer of trees planted in this open space (planting effects) have the cooperative effects of preventing dust accumulation on leaves in the city.
2) Usually over 80% of stomates of Pinus thunbergii leaves closed in the outer parts of Imperial Garden, but in the center, about 1 km apart, no or very few stomatal closing occurred.
3) The amount of dust accmulation on old leaves was from 30% to above 3 times greater than those on new leaves. Degree of stomatal closing of old leaves was higher that of new leaves.
4) Most asily dust accumulating part of Pinus leaves was the finely serrated edge of leaves and low amounts of dust accumulation on waving or flat parts of leaves were observed.
5) As dusts on leaves persisted even after raining, there will be need to wash leaves to keep from hard fixing of dusts on leaves and protect from growth inhibition of trees.View full abstractDownload PDF (5181K)
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