Earticle

초록

영어

Understanding the temporal variability of agricultural parameters derived from historical climate data is important for planning in agriculture. Therefore, this study assessed the magnitude and recent trends of the transpiration ratio defined as the crop water use per harvested yield for the period from 1980 to 2010. The crop water use was estimated using the Food and Agriculture Organization’s Crop Wat model for eight administrative provinces in Korea. The temporal trends and spatial uncertainty were explored using the Mann-Kendall and Theil Sen’s methods. The regional average rice yield was 6.31 t ha-1(range 5.9 to 6.9 t ha-1). The results showed that the rice yield in Korea increased by 26 kg ha-1yr-1. Overall, the regional average transpiration ratio was 1,298 m3 t-1 (range 1,162 to 1,470 m3 t-1). From 1980 to 2010, the transpiration ratio decreased by 8.2 m3 t-1 (range 2.7 to 14.4 m3 t-1), largely as a result of the increasing yield. The statistical approach to historical data used in this study also provides a basis for simulating the future transpiration ratio.

키워드

저자

• Temba Darlington Nkomozepi [ Department of Agricultural Civil Engineering, Kyungpook National University ]
• Sang-Ok Chung [ Department of Agricultural Civil Engineering, Kyungpook National University ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  경북대농학지

• 간기

  계간

• pISSN

  2287-271X

• eISSN

  2288-0356

• 수록기간

  ~2014

• 십진분류

  KDC 525 DDC 635