行政院農業委員會台南區農業改良場  研究彙報第22號

油用向日葵肥料三要素需要量試驗

施宗禮

摘  要

施宗禮.1987.油用向日葵肥料三要素需要量試驗。臺南區農業改良場研究彙報22:7~12。

一、為探討油用向日葵最適宜之施肥量,以配合推廣栽培之需要,曾於72年秋作及73年秋作在臺南縣歸仁鄉及嘉義縣義竹鄉二地進行田間試驗,經二地兩年(秋作)試驗結果,氮素用量以80∼120Kg/ha之子實產量最高,磷酑(P2O5)及氧化鉀(K2O)用量雖以80Kg/ha者之產量最高,但與40Kg/ha者之產量差異不明顯,故以40Kg/ha之施用量為宜,亦較為合於經濟原則。因此油用向日葵臺南一號之最合理之肥料三要素施用量為80∼120:40:40(N:P2O5:K2O)Kg/ha。

二、肥料三要素之不同施用量處理,對於子實含油率之影響不明顯。

三、在磷、鉀肥之適當施用量條件下,增施氮肥對其株高花序、直徑及子實產量均有顯著之效果。

四、花序直徑大小與子實產量關係密切。


Study on the Application Ratio of Nitrogen, Phosphate and Potassium in Sunflower

T. L. Shin

Summary

1. In order to seek the optimum application ration of N. P2O5 and K2O in sunflower for practical cultural application, studies were practiced field experiment at Guei-Ren, Tainan and I-Chu, Chia-Yi prefecture in fall seasons of 1983 and 1984, respectively.  The results indicated that the highest seed yield was produced at the ration 80~120 kg/ha of N, and 80 kg/ha of P2O5 and K2O.  However, 40 kg/ha of K2O made no difference with 80 kg/ha of K2O.  Thus 40 kg/ha of K2O was recommended to use more economically.

2. Effects of different application ratios of N. P2O5 and K2O on the oil content of sunflower was insignificant in this study.

3. Under the proper application ratio of P2O5 and K2O to certain extent, the more N ratio was used the more seed yield, the more diameter of florescence, and the higher plant height were got.

4. There was a high positive relationship between the diameter of inflorescence and seed yield in the study.

Research Bulletin of Tainan DAIS 22:7~12



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