矽酸爐渣對水稻白葉枯病抵抗性之影響

Effects of silicate slag on resistance to bacterial blight in rice

張素貞(Su-Jein Chang) ； 楊嘉凌(Jia-Ling Yang) ； 李成章(Cheng-Chang Li) ； 曾德賜(Dean Der-Syh Tzeng)

《苗栗區農業改良場研究彙報》 4期 (2016/10) Pp. 15-27

摘要

本研究期以施用矽酸爐渣來降低白葉枯病害對水稻的危害，結果顯示施用矽酸爐渣處理可降低白葉枯病斑的發展，第1期作及第2期作施用矽酸爐渣處理可明顯降低白葉枯病斑的發展，其分別降低40.2%及13.7%，且兩期作施用矽酸爐渣處理之平均病斑長度均降至罹病程度屬中度感病等級，對照處理平均病斑則屬感病級。為進一步暸解矽酸爐渣不同施用量於水田中對水稻白葉枯病影響之情形，以矽酸爐渣每公2頃公噸及4公噸與對照處理差異顯著，就各品種在施用矽酸爐渣後所降低百分例來比較，在4tons/ha之處理之下白葉枯病病斑長度明顯減少的現象， 臺中秈10號減少19.1%，臺稉9號為10.8%，臺農67號為5.5%，尤其是臺中秈10號2公噸處理無法降低病斑長度，但在4公噸施用時則明顯地加強稻株對白葉枯病的抵抗性。綜合本研究結果顯示施用矽酸爐渣於稻田中可降低白葉枯病對水稻之危害，但在用量上須要依栽種品種而異，方可達到施用矽酸爐渣的效應。

關鍵字

矽酸爐渣 ； 水稻 ； 白葉枯病抵抗性

並列摘要

The main objectives of this study were to investigate the effect of silicate slag on resistance to bacterial blight in rice. Firstly, two treatments were constructed to understand the difference between the effects of the silicate slag and non-silicate slag on disease severity of bacterial blight in rice. The inhibition of rice diseases by silicate slag was found in this experiment, especially on bacterial blight, the decreasing percentage up to 40.2% and 13.7% in the first crop and second crop seasons, respectively. Secondly, the experiment was designed with application of three amounts of silicate slag, 0, 2, 4 ton/ha among four varieties, Taichung sen 10, Taichung native 1, Tainung 67, and Tai-keng 9, in the paddy field. There was significantly different in disease severity among the amounts of silicate slag or rice varieties. The results showed that the reduction of disease severity was decreased 19.1% of Taichung sen 10, 10.8% of Tai-keng 9, and 5.5% of Tainung 67 under 4 tons/ha silicate slag application. However, the application of 2 tonslha silicate slag for Taichung sen 10 did not reduce the severity of rice bacterial blight, suggesting higher of application for Taichung sen 10 would be recommended. There is no effect of silicate slag on the bacterial blight resistance in highly susceptible variety, such as Taichung native 1. In conclusion, application of silicate slag on rice could increase resistance to bacterial blight.

並列關鍵字

silicate slag ； rice (Oryza sativa L.) ； bacterial blight (Xanthomonas oryzae pv. oryzae) ； resistance