| Summary: | 碩士 === 國立中興大學 === 園藝學系 === 89 === Experiment were conducted to study the effect of planting density and truss numbers on fruit yield and harvesting period of tomato ‘Hualien AVRDC No.5’. Four planting density (12.5, 11, 6.2, and 3.7 plants/m2) with two to five trusses per plant were scheduled for the first trial and two planting densities (12.5 and 11 plant/ m2) with one to four trusses per plant for the second planting. Seedling were transplanted on June 2, 1999 for the first trial and on April 18, 2000 for the second trial.
Results indicates that, both total fruit yield and marketable fruit yield per squaremeter increased as plant density and truss keeping number increased. However, the fruit size and percentage of marketable fruit yield decreased. Both fruit thinning and decreasing the truss number per plant both could increase the average fruit weight and percentage of marketable fruit. According to the data, plant density at 12.5 and 11.0 plants per squaremeter with five trusses per plant and plant density at 11.0 plants per square meter with four trusses per plant could have higher total fruit yields, marketable yield and early fruit yields per unit area. Compared to common cultural method of 3.7 plant per square meter and five trusses per plant, tomato at plant density of 12.5 and 11.0 plant per squaremeter and with two trusses per plant could obtain higher early fruit yields and shorter harvested duration, but no effect on total fruit yields and marketable fruit yields.
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