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Date:2022-11-30
Chia-Yu Lin*1 , Dong-Hong Wu2 , Yi-Chien Wu3 , Chin-Yang Yang4 , Ming-Der Yang4 , Ming-Hsin Lai2 , Su-Jein Chang1
1Miaoli District Agricultural Research and Extension Station, Council of Agriculture, Executive Yuan
2Taiwan Agriculture Research Institute, Council of Agriculture, Executive Yuan
3Taichung District Agricultural Research and Extension Station, Council of Agriculture, Executive Yuan
4National Chung-Hsing University
ABSTRACT
Rice is a crop with high irrigation water requirement, adjusting irrigation methods to reduce water consumption and improve water use efficiency has been an important issue in recent years. In addition, the amount of nitrogen fertilizer application will affect yield, quality and risks of cultivation, judicious use of fertilizer combined with variety and climate is also an important project. This study was conducted to investigate the effects of different irrigation levels and nitrogen doses on yield of rice Tainan 11 in 2019-2020. Two different irrigation model (conventional practice and alternative wetting and drying irrigation) and three different nitrogen doses (60, 180, and 260 kg N/ha) were applied to paddy rice. The results showed that high nitrogen fertilizer application rate could not increase the yield, but increase risks of cultivation such as lodging and disease. In addition, alternative wetting and drying irrigation mode can save about 36.9% irrigation water compared with conventional practice, reduce the labor of irrigation, and cause no significant impact on the yield, which can be used as a suggest for farmers.
Keywords: rice, alternative wetting and drying irrigation, water-saving cultivation, water use efficiency
*Corresponding author email: 328@mdais.gov.tw