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Volume 45 (1981 - 198･･･
- Issue 4 Pages 213-
- Issue 3 Pages 157-
- Issue 2 Pages 3-
- Issue 1 Pages 3-
Volume 45, Issue 3
Displaying 1-3 of 3 articles from this issue
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The effect of weeding in Pinus forrest on reproductive biomassToshinori SHIGEMATSU, Rikio TAKAHASHI1982 Volume 45 Issue 3 Pages 157-167
Published: February 10, 1982
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSWhen considering the development of recreational possibilities of secondary woodlands that remain in city suburbs, it is very important to prepare a management programme The major aim of this research is to ascertain the effects of periodical weeding, as one of the management practices, on ground vegetation in terms of reproductive biomass and floristic composition. Experimental works were undertaken in Pinus woods in Nose, Osaka and Kameoka,
Permanent quadrats were placed on abandoned old stands with overgrown undergrowth. The interim observation over a perid of four years suggests that a regrowth expressed in fresh. weight depends on the length of interval in the weeding cycle, and also as much, if not more, on the light intensity on the forest floor. kyoto.
Judging from results in the Nose stand, which has the greater potential as a recreational site, a semiannual or annual cycle of weeding practice is regarded as suitable for developing a grass-covered floorscape which provides the visual and physical conditions necessary for rocreational pursuits, such as walking or strolling.View full abstractDownload PDF (8569K) -
Seiroku OTA1981 Volume 45 Issue 3 Pages 168-174
Published: February 10, 1982
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSThe aim of the paper is to study the growth and development of Ophiopogon japonicus under various shading conditions. O. japonicus is often used as a groundcover plant in japanese gardens. And it is a “shade plant” adaptable to a wide range of light intensities. Light intensities in three treated plots were 1%, 10% and 48% of full sunlight. Investigations also were made for the growth and development of plants in the habitat. O. japonicus usually grows in shadowy habitats such as broad-leaved forests or Charnaecyparis obtusa stands on Mt.Handa.
The total plant fresh weight during the whole period causes the average increases of 0.5g, 7.4g and 15.9g in 1%, 10% and 48% plots respectively. As for other growth indices, the values in 48% plot are generally superior to those in 10% plot, followed by those in 1% plot. In 48% plot, the, vigorous growth is observed at each index of stock and daughter plants. In 10% plot, the favorable. growth per total plant is attributed to the growth of daughter plants. In 1% plot, the growth of leaves, per total plant increases, whereas roots decaysomewhat.
Stock plant harvested in treated plots exhibits a pattern of leaf growth which follows normal typecurve. Normal type curve specifically changes its, slope depending on the level of shading, with imperfect curve of daughter plants which has progressivelythe steep slope with the increase of shade. Stock plant on habitat in Winter exhibits a pattern of leaf growth which follows negative asymmetric type curve and, in Summer, bimodal type curve.View full abstractDownload PDF (865K) -
Grade of vegetation naturalness and conservation planningByung Ho BAE, Hisato IDE1982 Volume 45 Issue 3 Pages 175-184
Published: February 10, 1982
Released on J-STAGE: July 19, 2011
JOURNAL FREE ACCESSIn the conservation planning of natural parks, protection of vegetation is the most significant point.
Consequently, conservation plan should be made basically under phytosociological investigations.
The purpose of this paper is to conserve vegetation in the preservation planning at Takao quasi national park.
The results of vegetation survey are as follows
As an actual vegetation, 7 communities are recognized. Those are Cephalotaxus harringtonia-Abies firma community, Abies firma-Fagus japonica community, Cornus controversa-Zelkova serrata community, Quercus myrsinaefolia-Quercus serrata commnnity, Cornus controversa-Quercus serrata Community, Hydrangea involucrata-Euptelea polyandra community, Houttuynia cordata-Cryptomeria japonica community, weed community on cultivated land, cut over area and non-vegetation area.
As the result of potential natural vegetation survey, following communities were recognized. Illicio-Abietum firmae, Acero-Zelkovetum, Hydrangea involucrata-Euptelea polyandrae
Ass, Quercetum myrsinaefoliae subassociation of Abies firma and Quercetum myrsinaefoliae subassociation of Zelkova serrata.
The grade of vegetation naturalness was divided into five degrees comparing the actual vegetation with the pontential natural vegetation.
We intended to make zoning plan for protection of vegetation with a special attention to the grade of vegetation naturalness and we discussed the necessity of the improvement of existing conservation plan. Conservation plan was proposed as Fig. 5.View full abstractDownload PDF (4856K)
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