甲府盆地西部地域の温室園芸

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Garden farming in Japan is, in some areas of the country, concentrating on the greenhouse development of agriculture and is being received favorably. One reason why this type of farming is making such great strides is because it is bringing farmers under mixed management with other agricultural branches: before greenhouse culture was introduced there were already regional difficulties.The author considers in this article some of the main garden farming regions in Japan, and then refers to the process of regional formation and facts concerning mixed management. Greenhouse horticulture in the Kofu Basin is located 300m above sea level. This area is greatly subject to the influence of cold in the winter season as compared to regions normally located along many coastal warm districts. Melons have been widely cultivated without heating three times a year in that area since 1925. It stands out in sharp contrast to melon cultivation with heating apparatuses in Shizuoka Prefecture. Then, on ground of alluvial fan land, geographically there is not an advantage over the location of garden farming with the osmotic action (permeability) of water.This report deals with the following three questions: at first the author involved consideration of “how to accommodate to unfavorable physical conditions” from various angles. Secondly, it accounts for silk worm culture concerning greenhouse horticulture and sericulture; the actual states of mixed management, and conditions of the development in greenhouse culture are restricted by the silk-raising industry. By introducing greenhouse culture in the traditional silk-worm culture, needless to say, the inclination of mixed managements, with their farmings marks the character of this area. Thirdly, though the area of greenhouse horticulture in Japan is getting more and more prosperous, a marked tendency to decrease its management size is seen lately with a few notable exceptions in this area. So we investigated their main causes thoroughly.The Kofu Basin is cold in the winter season; it is absolutely necessary for those who would carry on greenhouse culture to enrich cheap and plentiful labour with the work of keeping warm. The author believes that their production on an enlarged scale by greenhouse culture has been less prosperous. Another condition is prevented by mixed management with the silkworm culture. According to the labour productivity and the rationalization of management, greenhouse culture in other places outside the area of the Kofu Basin is getting more and more prosperous. In this area, on the contrary, far from trying to expand production, the farm-houses occupied mainly with greenhouse culture have a tendency to decrease with the diversified classes.

甲府盆地西部地域の温室園芸

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