Winter wheat canopy interception and its influence factors under sprinkler irrigation |
| |
| Institution: | 1. College of Agronomy, Northwest A&F University, Taicheng 3, Yangling, Shaanxi 712100, PR China;2. Key Laboratory of Crop Physic-ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture Northwest A&F University, Yangling, Shaanxi 712100, PR China;3. College of Agriculture, Shanxi Agricultural University, Taigu 030801, PR China;4. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China;5. Key Laboratory of Dryland Agriculture, Ministry of Agriculture and Rural Affairs of the People''s Republic of China, Beijing 100081, PR China;1. State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China;2. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;3. Institute of Molecular Biology and Biotechnology, The University of Lahore, Pakistan;1. Center for Agricultural Water Research in China, China Agricultural University, Beijing, 100083, China;2. Shiyanghe Experimental Station for Improving Water Use Efficiency in Agriculture, Ministry of Agriculture and Rural Affairs, China;1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of the Ministry of Education, Northwest A&F University, Yangling 712100, Shaanxi, China;2. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China;3. Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China;1. College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China;2. International Potash Institute (IPI), P.O. Box 260, Baumgärtlistrasse 17, CH-8810 Horgen, Switzerland;3. c/o ICL Fertilizers, P.O. Box 75, Beer Sheva, 8410001, Israel;1. College of Agronomy and Biotechnology, Southwest University, Beibei 400716, Chongqing, PR China;2. Institute of Upland Food Crops, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, PR China;3. Guizhou Liangfeng Agricultural Science and Technology Co., LTD, Guiyang 550006, Guizhou, PR China;4. State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, Department of Plant Genetics and Breeding, China Agricultural University, Beijing, 100193, China |
| |
| Abstract: | Field studies on winter wheat canopy interception with its relations to leaf area index (LAI), plant height, drop diameter, wind speed, and water application intensity were carried out. Canopy interception was measured using the water wiping method. Results indicate that the maximum value of winter wheat canopy interception was not more than 1.0 mm, much smaller than presented by previous investigators. The total canopy interception for the growing season was 2.4 mm, only 1.3% of the total irrigation amount (194.6 mm), for four sprinkler irrigation events during 2003. Canopy interception increased as leaf area index and plant height increased. A linear regression model was developed to express the relationship of canopy interception with leaf area index and plant height. There was good agreement between the values of canopy interception measured using the water wiping method and estimated using the linear regression model. Results also indicate that canopy interception decreased as drop diameter and wind speed increased. An exponential relationship was found between canopy interception and drop size, and a linear relationship between canopy interception and the square of the wind speed. Water application intensity does not affect canopy interception significantly. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
