トマト生産における長段栽培と低段栽培の違いが乾物生産，障害果発生に及ぼす影響

Abstract

In this experiment, tomatoes were cultivated from September to June containing low-temperature, low-radiation conditions to high-temperature, high- radiation conditions, with a long-term cultivation without pinching and a short-term, low-truss cultivation with pinching, to investigate the effects of weather conditions and pinching on dry matter production and the incidence of disordered fruit. The results showed that there were large differences in light-use efficiency (LUE), dry matter distribution, and disordered fruit between the long-term and short-term, low-truss cultivation. Under high temperatures, LUE decreased, and fruit size was suppressed in long-term cultivation. In contrast, LUE was not reduced and fruit size was improved in the short-term, low-truss cultivation. Under high temperatures, long-term cultivation resulted in a remarkable decrease in the ratio of marketable fruit yield. Long-term cultivation produced more disordered fruits such as cat face fruits, small fruits, and blossom-end rot. On the other hand, short-term, low-truss cultivation had a higher percentage of marketable fruit than long-term cultivation, and the only fruit disorder was radial fruit cracking. From these results, it was concluded that short-term, low-truss cultivation is suitable for high-temperature environments.