Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (4): 1071-1079.DOI: 10.3969/j.issn.1000-2561.2021.04.024

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Effect of Silicon Fertilizer on Sugarcane Production and Its Resistance to Stalk Borer

LIN Zhaoli1, ZHANG Hua1, LUO Jun1, GAO Shiwu1, YAO Junli2, XU Liping1,*()   

  1. 1. Key Laboratory of Sugarcane Biology and Genetic Breeding (Fujian), Ministry of Agriculture and Rural Affairs, Fujian Agriculture and Forestry University / National Engineering Research Center for Sugarcane, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
    2. College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
  • Received:2020-05-05 Revised:2020-06-23 Online:2021-04-25 Published:2021-04-25
  • Contact: XU Liping

Abstract:

In order to validate the effect of silicon fertilizer on the increase of sugarcane resistance to Chilo sacchariphagus Bojer, the silicon content, the resistance indexes of stalk borer and yield traits of sugarcane were investigated under the natural population of stalk borer in the field. The application amount range of 187.5-750 kg/hm2 silicon fertilizer could significantly increase the silicon content in sugarcane in the whole growth period, significantly reduce the boring rate and damage degree of stalk borer. The positive responses observed due to the amount of silicon fertilizer were consistent with the content of silicon in sugarcane and the indexes of stalk borer resistance. In term of the results of factor analysis, the seven resistance indexes could be simplified to three main factors, including the damage factor of stalk borer at seedling stage, the damage factor of stalk borer and growth and development factors of stalk borer at technically matured stage. The rate of dead heart at seeding stage, the rate of bored internodes and the rate of adult emergence at technically matured stage could be used as the indexes for evaluation the effect of silicon fertilizer on sugarcane resistance to stalk borer. Based on the stepwise regression analysis, the dead heart rate and the length of cumulative tunnels among the seven resistance indicators had the greatest effect on sugarcane yield. The dosage of 562.5 kg/hm2 silicon fertilizer could result in the best effects on the control of sugarcane borer and increment of sugarcane yield. This study shows that silicon fertilizer can significantly increase the silicon content in sugarcane and enhance the resistance to stalk borer, and thus effectively reduces the occurrence and damage of stalk borer, together with the promotion to increase sugarcane yield and income.

Key words: sugarcane, silicon fertilizer, Chilo sacchariphagus Bojer, resistance indexes of stalk borer, production

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