Characteristics of air temperature, solar radiation and vegetation on a forest-pastoral system under quercus acutissima Carr. trees in Shiba village of southern Japan
1998
Sugimoto, Y. (Miyazaki Univ. (Japan). Faculty of Agriculture) | Matsukubo, T. | Nakanishi, Y. | Manda, M. | Hirata, K.
As one of forms of complex system of forestry and animal production, studies were made on a forest-pastoral system under Quercus acutissima CARR. trees (nine years after planting the seedlings; 1,492 standing trees/ha). In this report, characteristics of air temperature, solar radiation and pasture composition under Quercus acutissima CARR. trees in Shiba village was described. 1) Daily mean air temperature was not different between under and outside of the Quercus acutissima CARR. trees canopy. However, during the period when Quercus acutissima CARR. is in leaf (spring to autumn) daily maximum temperature was lower, and minimum higher, under the trees canopy than the outside of it. 2) Relative values of solar radiation at the forest floor under Quercus acutissima CARR. trees to that in the open area varied with season, ranging from 100% in April to 25-35% in September. In contrast, under Cryptomeria japonica D. Don (ten years after planting of seedling: 1,800 standing trees/ha), relative solar radiation was constantly lower than those of under Quercus acutissima CARR. over the same period, ranging from 10-20%. 3) Grazing of the pasture by cattle under Quercus acutissima CARR. trees degraded Miscanthus sinensis Andersson var. sinensis, and increased the coverages of Poa sphhondylodes Trine, Carebreviculmis. R. Br. and Paederia scan dens (Lour.) Merrill var. mairei (Reveille) Hara. Orchard grass (Dactyls glomerata L.), which was the only sown grass in the pasture under Que
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