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Volume 20 (1994)
- Issue 4 Pages 214-
- Issue 3 Pages 141-
- Issue 2 Pages 99-
- Issue 1 Pages 1-
Volume 20, Issue 3
Displaying 1-5 of 5 articles from this issue
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Toshikuni OKAMURA, Atsushi YOSHII, Saburo HIGASHI, Jiro ISHIOKA1994 Volume 20 Issue 3 Pages 141-149
Published: January 31, 1995
Released on J-STAGE: February 09, 2011
JOURNAL FREE ACCESSRecently, many afforestation works have been carried out for environmental conservation in bare areas due to construction works. However, many planting trees have died of frost and drought damages in the cold district. Hurdle-fence is a slit-type fence devised for wind-break and snow-accumulation. Based on experiments, hurdle -fences can reduce the wind by one-fifth at50cm above the ground, and can keep accumulated snow longer (from early winter to early spring) inside of the fences compared to the outside. For these reasons, planting trees take root in higher rate and grow taller than those outside of the fences.View full abstractDownload PDF (1096K) -
Tatsuaki KOBAYASHI, Atsushi TAGA, Takeshi OKINAKA1994 Volume 20 Issue 3 Pages 150-157
Published: January 31, 1995
Released on J-STAGE: February 09, 2011
JOURNAL FREE ACCESSThe internal water status was disturbed in Prunus×yedoensis, Quercus serrata and Populus alba, since water uptake was reduced by flooding. In P.×yedoensis, all leaves fell in two weeks of continuous flooding because of the serious water deficit. In Q. serrata, internal water deficit caused the much decrease of stomatal and mesophyll conductance, thereby, resulted in the decline of growth rate. However, the seedlings of Q. serrata survived flooding condition through the development of internal drought tolerance by way of osmotic adjustment. In the early flooding stage, P.alba reduced the stomatal conductance and photosynthetic rate due to internal water deficit, however, in the late stage, water uptake was almost recovered. The morphological acclimation such as the formation of adventitious root, leaf thickening and developent of small leaves were prominent, and the stomatal conductance and photosynthesis were recovered, therefore, the decrease of weight was less for P.alba. In Salix chaenomeloides, water uptake was not reduced, hence, the growth and its allocation were not affected by flooding stress.View full abstractDownload PDF (872K) -
Yoshiko KOSUGI, Sumiji KOBASHI, Syozo SHIBATA1994 Volume 20 Issue 3 Pages 158-167
Published: January 31, 1995
Released on J-STAGE: February 09, 2011
JOURNAL FREE ACCESSIn this study modeling stomatal conductance is investigated using data sets which contain diurnal and seasonal change of stomatal conductance on leaves of several temperate evergreen broad-leaved trees observed with porometric method. The conformity and parameter values of several models were compared using short term data sets. The models maximally have 7 parameters and 3 atmospheric variables (photosynthetically active radiation, vapor pressure deficit and air temperature). Parameters in the models were determined with non-linear least squares technique. Using one model which has6parameters and3atmospheric variables, stomatal conductance were also simulated successfully in long term separating all seasons to3groups considering leaf age.View full abstractDownload PDF (1095K) -
Yoshiteru NOJIMA, Takeshi OKINAKA, Hironao SETO, Chiharu KURAYAMA, Min ...1994 Volume 20 Issue 3 Pages 168-176
Published: January 31, 1995
Released on J-STAGE: February 09, 2011
JOURNAL FREE ACCESSA measurement experiments were done in order to examine the effect of planting on the roof of a building to suppress the increase of surface temperature in summer of 1993. The data of thermal environment such as temperature, heat flux, etc. were continuously measured by machine at 3 typical points (the area planted with shrubs, the pavement within shade of a table and the pavement without shade). Also other data such as leaf transpiration rate etc. were measured by man power on the cloudy day of August2 and the fine day of August 12. At the pavement without shade, the surface temperature (maximum56.6°C) and the heat flux from outside toward the roof of the building (maximum507W/m2) were the highest among3typical points. At the pavement with shade, the surface temperature was fairly law (maximum32.6°C), but the heat flux was still big (maximum 121W/m2). On the other hand, at the planted area, the temperature was lower than the shaded pavement except around14: 00and the heat flux was very small (maximum33W/m2) by the effect of cutting sun beam, and the transpiration from leaves.View full abstractDownload PDF (1539K) -
Scar of the Gulf War in KuwaitKen YOSHIKAWA, Fukuju YAMAMOTO1994 Volume 20 Issue 3 Pages 177-187
Published: January 31, 1995
Released on J-STAGE: February 09, 2011
JOURNAL FREE ACCESSDownload PDF (3642K)
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