摘要
【目的】探讨桂蹄2号对荸荠秆枯病和枯萎病的田间抗性,为荸荠生产提供科学指导。【方法】以广西荸荠主产区平乐县、荔浦县、贺州市平桂区为试验点,各试验点分别选择土壤肥力程度高、中、低3种类型田块,每种类型田块分别种植桂蹄2号和当地农家品种,在荸荠封行期和膨大期进行荸荠秆枯病和枯萎病病害调查,并计算病情指数。【结果】在荸荠封行期,3个试验点桂蹄2号均未发生秆枯病,对照病情指数为7.57-16.87;枯萎病桂蹄2号病情指数为0-7.50,对照病情指数为3.58-14.23。在荸荠膨大期,3个试验点桂蹄2号秆枯病病情指数为8.42-22.58,枯萎病病情指数为5.16-20.26;差异显著性分析显示,荸荠秆枯病和枯萎病病情指数在平乐县试验点和荔浦县试验点与对照达极显著差异水平（P〈0.01）,在贺州市平桂区试验点与对照达显著差异水平（P〈0.05）。桂蹄2号在不同土壤肥力的抗病性表现为：高土壤肥力〉中等土壤肥力〉低土壤肥力。【结论】桂蹄2号较当地农家品种抗荸荠秆枯病和枯萎病,可在广西各地推广种植。
【Objective】The present experiment was conducted to investigate Guiti 2＇s resistance to stem blight and fusarium wilt to provide scientific guidances for production of water chestnut. 【Method 】The native variety and Guiti 2were planted on three kinds of fields with different soil fertilities（high, medium and low） in water chestnut major producing areas of Guangxi viz., Pingle and Lipu countries, Hezhou＇s Pinggui district, respectively. Then the stem blight and fusarium wilt of water chesnut were investigated during the closure and expanding stages, and their disease indexes were calculated. 【Result 】The results showed that during the closure stage, Guiti 2 wasn ＇t infected with stem blight in three experimental fields compared with control disease index of 7.57-16.87. And the fusarium wilt disease index of Guiti 2 was0-7.50,that of control was 3.58-14.23. During the expanding stage, the stem blight and fusarium wilt disease indexes of Guiti 2 were 8.42-22.58 and 5.16-20.26, respectively, which were significantly lower than those of the control. In addition, the significant difference analysis showed that, there were extremely significant difference in water chestnut stem blight and fusarium wilt between Guiti 2 and the control in Pingle and Lipu countries（P〈0.01）, and significant difference in water chestnut stem blight and fusarium wilt between Guiti 2 and the control in Hezhou ＇s Pinggui district（P〈0.05）.The order of soil fertility for resistance of Guiti 2 from strong to weak was as follow： high soil fertility medium soil fertility low soil fertility. 【Conclusion 】Guiti 2 can resist to stem blight and fusarium wilt compared with native varieties,which is suited to be planted in different areas in Guangxi.
出处
《南方农业学报》
CAS
CSCD
北大核心
2015年第6期1029-1033,共5页
Journal of Southern Agriculture
基金
国家科技支撑计划项目(2012BAD27B01-6)
广西科学研究与技术开发计划项目(桂科能14121008-1-12
桂科转1346004-28)
广西农业科学院基本科研业务专项项目(桂农科2013YM27)
关键词
荸荠
荸荠秆枯病
荸荠枯萎病
病情指数
water chestnut
stem blight of water chestnut
fusarium wilt of water chestnut
disease index
