• 作者： 曾富生
• 作者服務機構： 國立中興大學糧食作物研究所
• 中文摘要： 大豆有限型及無限型各6個品種，以兩種氮肥處理，栽培於春作與秋作，調查營養生長期植株之生長勢與產量之結果。 有限型品種之生長勢具有葉面積大而薄及株重急速增加，而無限型品種則為葉面積大而厚及株重急速增加之特性。 在春作，營養生長旺盛之有限型品種，產量之氮肥反應效果差，不旺盛之品種在不施肥時產量也低，而在施用氮肥時則具有提高產量之效果，但無限型則迥異。至於在秋作時，兩型品種均表現營養生長愈旺盛者其產量愈高，同時其氮肥反應效果愈大。 總之，在春作，營養生長旺盛及晚熟之有限型品種產量之氮肥反應效果小；而無限型品種則大。但在秋作，兩型品種均發現旺盛及晚熟者，其產量之氮肥反應效果較大。
• 英文摘要： For study of the vegetative vigor in relationto yield and nitrogen response, six determinateand six indeterminate varieties of soybean weregrown in spring and fall seasons with two ni-trogen levels. In determinate varieties, vegetative vigorsare characterized by rapid weight increase, bigleaf area and thin leaves at flowering stage andrapid weight increases, big leaf area and leafweight/leaf area at that stage in indeterminatevarieties. In spring season, determinate varieties withhigh vegetative vigor respond negatively to ni-trogen application, but no similar results werefound in indeterminate varieties. Yield of thedeterminate varieties with low vegetative vigoris usually low at low nitrogen levels and usuallyrespond positively to nitrogen application atboth seasons. On the other hand, varieties ofboth types with high vegetative vigor havegreater chances to respond positively to nitrogenapplication. Consequently, determinate varieties withhigh vegetative vigor and long growth durationwould have the least chances whereas those withlow vegetative vigor and short growth durationwould have the most chances to respond wellto nitrogen application at spring season. Whilein indeterminate varieties, both of those withhigh and low vegetative vigor or long and shortgrowth duration would have the most chancesto respond well to nitrogen application in thespring season. Both types of varieties withhigh vegetative vigor and long growth durationcan be respond to nitrogen application in fallseason.
• 中文關鍵字： --
• 英文關鍵字： --