再生芽割蘗處理具有延長再生稻生育期及提高產量與品質的效果，本研究目的即在比較處理再生芽方式對再生稻生育及產量的影響。於民國78年二期作選出再生率高且生長快之臺粳2號為再生稻試驗材料。民國79年一期水稻收穫後，以四種殺草劑及二種割蘗高度處理再生芽，結果以嘉磷塞處理藥害最小，農藝及產量性狀均優於其他殺草劑處產量低於對照，但施用paraquat及glufosinate-ammonium能提高抽穗整齊度。割蘗高度15㎝及5㎝處理的產量與對照無差異，但抽穗整齊度顯著提升。試驗結果顯示，對再生芽施以處理並不能提高再生稻之產量，處理再生芽之主效應可能在於促進抽穗整齊，使成熟期一致，而提高再生稻之米質。

Treatment of ratoon seelings has been proposed effective in prolonging the growth duration and enhancing both grain yield and quality of ratoon rice crop. The purposes of this study were to compare various methods of ratoon treatments on the growth and yield of ratoon rice crop. Talkeng 2 variety, with its high ratoon ability and tiller growth rate, was therefore selected as experimental material after havest of the second cropseason in 1989.Four herbicides and two cutting heights were tested for treatment effets after harest of the first crop in 1990.Experimental results indicated that, the application of glyphosate showed the least phytotoxicity and the highest ratoon rate, plant height, and dry matter production. However, heading uniformity was poor for this treatment. Long-term phytotoxicty was observed and grain yield was lower than the check plants for the other three herbicide treatments. On the other hand,heading uniformity was enhanced for paraquat and glufosinate-ammonium treatments. Cutting ratoon tillers at 5 or 15 cm above soil surface increased significantly the heading uniformity and produced similar grain yield as compared with the check plot. Employing ratoon treatments in this study failed to produce consistent result in increasing grain yield.Its major advantage is suggested to be promoting the uniformity of heading and maturity of ratoon tillers, and hence increasing grain quality of the ratoon rice crop.