• 作者： 吳育郎; 鍾德月; 劉文慶
• 作者服務機構： 躉灣省高雄區農業改良場
• 中文摘要： It is well known that Kaohsiung and Ping-tung prefectures are the most rice ,producingareas in Taiwan. The average rice yield is about4,727 kg/ha in the first crop is the highest，inthis island, and 2,731 kg/ha in the second ricecrop which is significantly low in yield com-paring to the other rice areas. Since the average yield of the second ricecrop is 30-40% lower than that of the firstcrop in southern Taiwan, intensive effort hasbeen made to effect improvement. This coversstudies on the ecosystem, cultivars, genetics,cultural methods, irrigation and drainage systems.In 1975, a pioneer project was initiated toinvestigate the cause of low yield and to findout how to restore the yield potential of riceto a satisfactory extent. Results showed someeffective ways in raising the output of secondcrop to a significant level. The use of disease-resistant cultivars and the improvement offertilization and drainage systems. were themost successful ones, which brought about ayield increase of up to 15-20% in southernareas. Therefore, it is important to teach andtrain rice farmers and extension workers to applythese advanced new knowledges and mordentechniques which may bring yield increase ofthe second rice crop, unless the climatic condi-tions are very unfavorable.
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