行政院農業委員會台南區農業改良場  研究彙報第14號

大豆營養生理之研究(I)秋季大豆不同氮肥處理之營養生理反應

黃和炎

摘  要

選擇4個不同型態之大豆品種,以不同氮肥量處理,於67年9月4日在本場農場進行營養生理測定。種子出土後每隔10天取樣分析株高、葉面積、各部位乾物重、各部位N、P、K、Ca、Mg含量。試驗結果N肥處理間對子實產量以矮性早熟品種受N肥影響較大、高性晚熟品種之產量受N肥影響較少。乾物重在出土後50天達最高量,植株N、P、K之含量以出土後20∼40天(盛花期)較高,Ca、Mg之含量較不規則。


Study on Nutrition and Physiology of Soybean (1) Response of Fall Crop Soybean to Nitrogen

H. Y. Huang

Summary

        This experiment was carried out at Tainan DAIS.  Four types of soybean varieties were tested to nitrogen response for nutritive and physiological reactions.  Soybean was sown in September, 1978 and harvested in November.  Sampling of plants for leaf area index, dry matter, N, P, K. Ca and Mg analysis were at 10-day intervals.  Based on the results of this experiment, it may be concluded that the seed yields of short plant and early maturing varieties were more affected by nitrogen nutrition, but those of high plant and late maturing varieties were less.  The dry matter was the weightiest on 50 days after emergence.  The concentrations of N, P, K were higher on 20~40 days after seed germination, and the concentrations of Ca, Mg were irregular.



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