On shade tolerance of some trees and shrubs by surveying chlorophyllous content variation produced in more or less sunlight site.(I)

Abstract

In the condition of more or less sunlight, some trees and shrubs, generally, take possession of differerence between tolerant and intolerant. Nosurvey-method of such difference due to scientific basis, hitherto, but by experience.
Intending to find such grade data simply and practically, we come to keep some base, which is a handy chlorophyllous instrument. Leaf y branches of some trees and shrubs were set under a classified lux in our campus, we expected chlorophyllous content produced in leaves at limited hours. Having read result of such content quality indicated at instrument under each lux, we concluded biological character in tolerance as follows: Tolerant
Laurus nobilis L., Castanopsis cuspidata Schottky, Mahonia japonica DC., Camellia sasanpua
Thunb., Eurya japonica L., Ternstroemia gymnanthera Sprague, Aucuba japonica Thunb.
Half-tolerant
Daphne odora Thunb., Osmanthus asiaticus Nakai var. aurantiacus Makino, Quercus phylliraeoides A. Gray, Pittosporum tobira Aiton, Lithocarpus edulis Nakai, Cinnamomum camphora Sieb., Magnolia kobus DC., Kerria japonica DC., Nerium indicum Mill., Camellia japonica L., Viburnum awabuki K. Koch, Acer trifidum Hook. et Arn., Photinia glabra Max., Aphananthe aspera Planch.
Intolerant
Forsythia suspensa Vahl., Ginkgo biloba L., Populus nigra L. var. italica Moench, Ligustrum obtusifolium S. et Z., Salix gracilistyla Miq