行政院農業委員會台南區農業改良場  研究彙報第27號

低酸化磷肥對水稻及玉米生長及產量之影響

施宗禮

摘  要

施宗禮.1991. 低酸化磷肥對水稻及玉米生長及產量之影響。台南區農業改良場研究彙報27:7~16。

本試驗的主要目的在探討水田及旱田施用低酸化磷肥以取代過磷酸鈣之可行性,藉以節省能源而獲得磷肥施用上之最大經濟效益。於1983年七月至1985年六月在台南縣後壁鄉及歸仁鄉等地進行水稻及玉米之肥效試驗。本試驗分無磷、過磷酸鈣(CSP)、75﹪及50﹪低酸化磷肥(75﹪LAP及50﹪LAP)等四處理。試驗結果顯示:水稻施用磷肥之稻穀產量一期作可增產1.4~3.5﹪,二期作增產1.3~2.1﹪,惟三種磷肥間之產量無明顯差異。由產量、磷含量、磷吸收量以及土壤有效磷含量等資料得知75﹪及50﹪低酸化磷肥,可以取代過磷酸鈣作為水稻之磷素供給源。至於玉米試驗結果,1983年秋裡作之子實產量,三種磷肥之施用,皆有顯著的增產效果,其增產值為5.0~6.6﹪,其中尤以50﹪低酸化磷肥效果較佳。1984年秋裡作之子實產量,施用磷肥處理亦均較無磷區(CK)高產,可增收4.5~5.3﹪,至於三種磷肥之增產差異則不明顯。綜所上述,不論作物對磷肥效應顯著與否,50﹪低酸化磷肥可適用於水稻及玉米作為磷素供給源。

關鍵詞:低酸化磷肥、水稻、玉米。

接受日期:1991年4月20日。


Studies on the Effect of Low Acidified Phosphates on the Growth and Yield of Rice and Corn

Shih, T. L.

Summary

This study was attempted to explore the possibility of using low acidified phosphorus (LAP) to replace calcium superphosphate (CSP) in upland and paddy field.  Fertilizer experiments were conducted in July 1983 to June 1985 at Ho-pi and Kuei-zen of Tainan Prefecture to valuate the effect of LAP on the growth and yield of rice and corn crops.  Four treatments, i.e. no phosphate fertilizer (NPF); calcium (CSP); 75% LAP and 50% LAP, were used in a latin square plots with four replication.  In rice, phosphate fertilizers increased 1.4~3.5% of yield in the spring crop and 1.3~2.1% in the fall crop and no difference in yield was observed among the three phosphate fertilizer treated.  Results of the yield, phosphate content, absorption of P2O5, and available phosphate indicated that 75% and 50% LAP can be used to replace CSP in rice cultivation.  In the fall crop of 1983, the three phosphate fertilizer also increased 5.0~6.6% of corn grain yield, and the best yield was observed in the plots with 50% LAP.  In the fall crop of 1984, phosphate fertilizers also increased 4.5~5.3% of corn grain yield, and no difference was observed as yields between phosphate fertilizers and non-treated control.  In general, 50% LAP can be used to replace CSP as phosphate source in rice and corn production.

Accepted for publication: April 20, 1991.



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