稻米為我國重要的糧食作物,國內稻作每年兩期種植水稻面積達25萬公頃,為瞭解全台的稻穀產量,國內是採用抽樣推估的方法進行,稱為坪割法。而全台所選定的坪割點高達2000個點以上,每個坪割點在作業上都需耗費相當多的人力,且坪割過程為人工作業,容易造成產量推估誤差。有鑒與此,本研究提出四種新的測量方法,包括組合使用測距輪、量測平台、穀類水份計、打斗筒等機械器具,並與慣用的人工坪割法,進行實地試用測量。於現場測試本研究所提出的四種稻穀產量量測方法,並與目前慣用的坪割法作面積測量、濕穀單位面積產量、乾穀單位面積產量等數值的差異比較外,也比較四種方法在人力、物力及作業時間上的差異。結果顯示進行濕穀單位面積產量推估,全部12個試驗點,有6個與人工坪割法差異在5%以內,平均差異約14.5%。進行乾穀單位面積產量推估,則有7個與人工坪割法差異在5%以內,平均差異約13.1%。
Rice is an important crop in Taiwan that has planting area of 250,000 hectares annually. In order to understand yield of rice, an estimated method was used that is named sampling methods. Taiwan government conducts the sampling method on more than 2000 sample points, which every sample point are required a lot of labors, and occasionally causes yield estimation errors. This study proposes four new measurement methods, including the use of wheel-walker, measurement platforms, grain moisture tester, volume weight tube, and other equipments. The measurement on yield was compared to the conventional sampling method. The comparison items for proposed methods and conventional methods included area measurement, wet grain yield per unit area, dry grain yield per unit area, along with labors, materials and operating time. The results showed that for wet grain yield per unit area estimation, among 12 test points, six sampling points differences within 5%, with a mean difference of about 14.5%. Dry grain estimated yield per unit area, have seven sampling points differences within 5%, with a mean difference of about 13.1%.