|Title:||水稻不稔症發生主因之探討(II)||Other Titles:||Studies on the Cause of the Empty Rice Grains in Taiwan (II)||Authors:||羅幹成
|Keywords:||水稻;不稔症||Issue Date:||Dec-1984||Publisher:||臺灣省農業試驗所||Related Publication(s):||農業試驗所特刊第16號||Start page/Pages:||217-222||Source:||稻作區域性與期作性低產及增產措施之研究||Abstract:||
Rice plants of cultivar Tainan No. 5 were planted on l/2,000a pots and were subjected to treatments of sterilized rice tarsonemid mites, unsterilized rice tarsonemid mites, or rice sheath rot fungus. Typical symptoms of empty grains (sterility) were induced on plants infested with rice tarsonemid mites but not on those infested with sheath rot fungus. The number of mites per tiller, sterility, panicle weight, average grain weight, length of panicle neck and degree of twisted panicle neck of the tarsonemid mite infected rice plants were significantly different from those of the sheath rot fungus infested rice plants and those of the check plants. The concentrations of soluble protein, nitrogen and total nonstructural carbohydrates in various plant organs were analyzed at several development stages. The tarsonemid mite infested rice plants were notably different from the others, especially in their total nonstructural carbohydrate content. This might be the important mechanism of the rice sterility. The implication of the rice tarsonemid mites in causing the empty grains of rice can be certified by this experiment.
|Appears in Collections:||應用動物組|
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