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Effect of Training, Growing Season and Plant Density on Yields and Fruit Quality of Sweet Pepper ''Lustro'' (Capsicum annuum L.)
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試驗一結果顯示，單株之總果數不論於秋冬季或春夏季皆以不整枝最大，與整枝間有顯著差異，分別為10.9 粒/株及5.0 粒/株，秋冬季雙幹整枝大於單幹整枝，春夏季雙幹整枝與單幹整枝無顯著差異，平均雙幹整枝大於單幹整枝。單株總果重不論於秋冬季或春夏季皆以不整枝最大，與整枝間有顯著差異，分別為1288.9 g/株及581.1 g/株，雙幹整枝與單幹整枝無顯著差異。單株可販售果數及果重不論於秋冬季或春夏季皆以不整枝最大，與整枝間有顯著差異，秋冬季分別為5.7 粒/株及987.6 g/株，春夏季分別為3.2 粒/株及424.4 g/株，雙幹整枝與單幹整枝無顯著差異。單株中大果數及果重於秋冬季以整枝最大，與不整枝間有顯著差異，單幹整枝與雙幹整枝無顯著差異，分別為單幹整枝之2.5 粒/株及609.9 g/株，雙幹整枝之2.3 粒/株及546.2 g/株，三種處理結果於春夏季無顯著差異。單株小果數及果重不論於秋冬季或春夏季皆以不整枝最大，與整枝間有顯著差異，秋冬季分別為4.0 粒/株及608.9 g/株，春夏季分別為3.1 粒/株及408.1 g/株，秋冬季雙幹整枝大於單幹整枝，春夏季單幹整枝與雙幹整枝無顯著差異。平均單果重不論於秋冬季或春夏季皆以單幹整枝最大，與雙幹整枝及不整枝間有顯著差異，分別為秋冬季之177.0 g/粒及春夏季之146.7 g/粒，秋冬季雙幹整枝大於不整枝，春夏季雙幹整枝與不整枝無顯著差異，平均雙幹整枝大於不整枝。果實品質指標如果實硬度、果肉厚度、可溶性固形物、維生素C含量等，於不同整枝處理間無顯著差異，果實硬度、可溶性固形物、維生素C含量為秋冬季顯著大於春夏季。
The objective of this study was to compare the effect of training method, growing season and plant density on yields and fruit quality of sweet pepper‘Lustro'(Capsicum annuum L.).
Sweet pepper plants were grown in peat-moss based soil bags in the plastic greenhouse for two seasons, the Autumn-Winter season and the Spring-Summer season, separately in Pu-Li. Yields and fruit quality of the plants were evaluated in both two seasons in the first trial under different training methods, single-stem pruning, twin-stem pruning, and non- pruning, respectively. And were evaluated in the second trial conducted also in the Autumn-Winter season in four treatments, single-stem pruning with 1.7 plants/m2 and 2.5 plants/m2 , twin-stem pruning with 1.7 plants/m2 , and 2.5 plants/m2 , respectively.
The total fruit number was greatest in non-pruned plants in both seasons, and was greater in twin-stem than in single-stem pruned plants in the Autumn-Winter season, but there was no difference between twin-stem and single-stem pruned plants in the Spring-Summer season.
The total fruit weight was greatest in non-pruned plants in both seasons, but there was no difference between twin-stem and single-stem pruned plants in both seasons.
Both of the marketable fruit number and fruit weight were greatest in non-pruned plants in both seasons, but there was no difference between twin-stem and single-stem pruned plants in both seasons.
Both of the medium-to-large fruit number and fruit weight were greatest in pruned plants in the Autumn-Winter season, but there was no difference between twin-stem and single-stem pruned plants. And there was no difference among non, twin-stem and single-stem pruned plants in the Spring-Summer season.
Both of the small fruit number and weight were greatest in non-pruned plants in both seasons. And were greater in twin-stem than in single-stem pruned plants in the Autumn-Winter season. There was no difference between twin-stem and single-stem pruned plants in the Spring-Summer season.
The average fruit weight was greatest in single-stem in both seasons. And was greater in twin-stem than in non pruned plants in the Autumn-Winter season. But there was no difference between twin-stem and non pruned plants in the Spring-Summer season.
The training methods did not affect the fruit quality characteristics like hardness, thickness, total soluable solids content, Vitamin C content, seed number and seed weight of the fruit.
The total fruit yields, marketable fruit yields, and small fruit yields per square meter were grater in plant density 2.5 plants/m2 than in 1.7 plants/m2 . But there was no difference in medium-to-large fruit yield and average fruit weight between them.
The plant density did not affect the fruit quality characteristics like hardness, thickness, total soluable solids content, Vitamin C content, seed number and seed weight of the fruit.
In summary, the total fruit yields and small fruit yields of sweet pepper were greatest in non-pruned plants. The medium-to-large fruit yields were greater in pruned plants than in non-pruned plants, but there was no difference in pruned plants between single-stem and twin-stem pruned plants. The average fruit weight was greatest in single-stem pruned plants. The total fruit yields, marketable fruit yields, and small fruit yields per square meter will increase when plant density was from 1.7 plants/m2 to 2.5 plants/m2 . But there was no difference in medium-to-large fruit yields and average fruit weight between them. The training methods and plant density did not affect the fruit quality. The yields and fruit quality was greater in Autumn-Winter season than in Spring-Summer season.
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