有機介質簡化養液栽培對胡瓜’夏笛’生長發育之影響

本試驗探討介質添加碳酸鈣與苦土石灰兩種鈣肥以及磷礦砂和肉骨粉等磷肥，再利用僅提供氮及鉀之簡化養液進行"夏笛"胡瓜栽培試驗。結果顯示在栽培期問處理組之介質pH隨生長日數增加明顯下降。在簡化養液栽培下，胡瓜葉片中必需元素之濃度皆在適量範圍。簡化養液處理之植株乾重大多顯著低於對照組，但植株鮮重多數較高於對照組，至於胡瓜株高、葉長、葉寬和葉片數則無顯著差異，而施用磷礦砂之處理則有提高胡瓜果實品質與產量的表現。This is an initial study of a simplified nutrition management by applying N and K in soilless culture of cucumber ‘Shia Di'after adding two kinds of calcium fertilizers, calcium carbonate and dolomite, and two kinds of phosphate fertilizers, phosphate rock and meat bone dust into the media. Using simplified nutrition culture cucumber.As the cultivation period lengthened, media pH of simplified nutrition treated was lower than that of the control. All elements contents in cucumber leaves are in suitable range by using simplified nutrition culture cucumber. Dry weight of treatment sets of simplified nutrition management are lower than that of control set, however, fresh weight is opposite. Plant height, leaf lengh, leaf width of cucumber has no significant between the treatments. Fruit quality and yield of cucumber are improved in phosphate rock set

光質處理對番茄苗株光合作用與碳水化合物之影響

本試驗以番茄(LYcopersicon esculentum MILL.)'花連亞蔬五號為材料，探討不同光質處理對番茄苗株光合作用速率與碳水化合物之影響。材料自播種後至五週苗齡，分別以660nm紅光、435nm藍光、紅光+藍光及400~700nm螢光燈四種光質處理。試驗結果顯示，苗株生育顯著受到光質處理的影響。葉片光合作用速率的日變化，明期初期，以紅光處理最高，且隨著光照時問的增加，而有上升的趨勢，尤以下午15:00光合作用速率達最高峰，而明期後期即下降。氣孔導度以紅光+藍光處理最高，為0.44molm-2s-1。Rubisco活性以紅光處理者最高，為0.l7nmol RuBP carboxylated mg protein-1 min-l。葉片全可溶性醣含量以紅光和螢光燈處理顯著高於藍光和紅光+藍光處理。葉片澱粉含量以螢光燈處理最高，為9.3%，藍光處理澱粉含量最低，只有3.05%。The objective of this study was to investigate the effects of light quality on the growth and development of tomato (Lycopersicon esculentum Mill.) seedlings. Seeds were sown in 5”pot and grown in growth chamber under different light quality (660 nm red light, 435 nm blue light, red light + blue light, 400~700 nm cool white fluorescent lamp). The photosynthesis rates of plants grown in all treatments increased with time of day and descended after 15:00, especially those grown in red light. Stomatal conductance was the highest when seedlings exposed to red light + blue light but was the lowest under fluorescent lamp. Rubisco activity was found the highest under red light and the lowest under blue light. Plants treated with red light had the highest soluble sugar content and followed by fluorescent lamp, red light + blue light and blue light, respectively. However, seedlings grown under fluorescent lamp accumulated the highest starch content at 9.3 % of dry weight base

‘三鳳’小白菜無土薄層介質栽培技術之開發研究

This study is trying to apply soilless medium film culture in an auto-production system by using 'San-Feng' pak-choi (Brassica campestris L. Chinensis Group). Hopefully, to reduce the production cost by using automized and factorilize management, to produce clean and healthy vegetables for customer use, and to increase agribusiness competences in the global world eventially. In soilless material thicknes, using 1.0, 2.0, and 3.0 cm of commercial medium. Florafleur-001H to produce pak-choi. As the medium thickness decreased, medium electrical conductivity (EC) incresed. Plant height, leaf number, leaf size, and dry weight were inhibited significantly. The best cultivation performance of was on 3 cm medium thick. However, the air filled porosity (AFP) of one to three cm medius thick was only 10.0％, 12.4％ and 14.9％, respectively. This caused great inconvenience in cultivation management. If rice hull (RH) and perlite (PR) were added to increase AFP TO 7.7-21.9％ as the commercial medium, leaf growth, fresh weight, dry weight, and final yield increased.本試驗為探討薄層介質無土栽培應用於短期葉菜類自動化生產模式之開發，應用，乃以'三風'小白菜為植物材料，利用商用介質Florafleur-OOlH為栽培介質，並將介質厚度控制為l公分、2公分、3公分栽植小白菜。介質愈薄者，介質EC值愈高。小白菜之林高、莖徑、葉片數、紊面積以及單株鮮乾重皆明顯受抑制，以3公分介質厚度者之植株生長之情形與產量最佳。利用蒲居方式栽植小白菜，介質由薄至厚其充氣孔隙度分別為10.0%、12.4%及15.0%。將此栽培介質經由稻殼或真珠石介質提高充氣孔隙度7.7~21.9%改善其物理性後，小白菜植株生育之葉面積、植株鮮乾重以，且最終產量可提升15一24.6%

穴格容積對小白菜穴盤苗生育之影響

Pak-choi cv. 'Dai Tokyo' were sown in 72, 128 and 288-cell plug tray to study the cell sizes effects on seedling growth. Results indicated that, no significant difference on the fresh weigh, dry weight, leaf number, leaf area and root length among different cell sizes at early stages, However, the difference among treatments increased and became significant after 12 days of sowing. Seedlings in 72-cell plugs showed the best growth. The root/shoot ratios was found higher on seedlings in 288-cell plugs than those in 72-cell and 128 cells. The relative growth rates of roots and shoot were also found higher at early growth stage and decreased as seedling ages increased. Both the seedlings in 72 and 128-cell plug had the similar trends in plastchron index values, but that of the seedlings in 288-cell plugs was significantly lower.本試驗探討'大東京'小白菜於72、128及288格三種穴盤育苗對幼苗生育之影響，結果顯示小白菜幼苗之單株鮮重、乾重、本葉數、葉面積、葉長、根鮮重、乾重及根長等皆與穴格容積成正相關，且與播種後天數呈二次回歸正相關。播種後9-12天，在不同穴盤間並無顯著差異，隨著播種後天數增加，差異逐漸加大，以在72格穴盤有最佳生育，Plastochron Index(PI)值在72及128穴格趨勢相似，而288穴格為最低。'大東京'小白菜之地下部/地上部比以288穴格者較72及128穴格者高。地上部及根部鮮重之相對生長速率，在播種後初期成最高值，隨播種後天數增加相對生長速率逐漸降低。288穴格苗株在播種後21天之相對生長速率較72及128穴格者小，其後差異減少不顯著