| Effects of irrigation and fertilization on water and temperature variation of spring maize under plastic-mulching ridge-furrow irrigation in the Hetao Irrigation District |
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| DOI：10.7606/j.issn.1000-7601.2019.02.07 |
| Key Words: plastic-mulching ridge-furrow irrigation spring maize water and temperature variation yield water use efficiency the Hetao Irrigation District |
| Author Name | Affiliation | | LI Cheng | College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China
Institute of Water and Soil Conservation,Chinese Academy of Science and Ministry of Water Resource,Yangling,Shaanxi 712100,China | | FENG Hao | Institute of Water-saving Agriculture in Arid Areas of China,Northwest A&F University,Yangling,Shaanxi 712100,China
Institute of Water and Soil Conservation,Chinese Academy of Science and Ministry of Water Resource,Yangling,Shaanxi 712100,China | | DONG Qin-ge | Institute of Water-saving Agriculture in Arid Areas of China,Northwest A&F University,Yangling,Shaanxi 712100,China
Institute of Water and Soil Conservation,Chinese Academy of Science and Ministry of Water Resource,Yangling,Shaanxi 712100,China |
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| Abstract: |
| In order to better understand the spatial and temporal distribution of soil water,soil temperature,and the yield characteristics of spring maize under plastic-mulching ridge-furrow irrigation in the Hetao Irrigation District, 4 field irrigation experiments were conducted from April to September in 2017 to determine the effects of the following treatments: high water and high fertilizer (I1F1),high water and low fertilizer (I1F2), medium water and high fertilizer (I2F1), medium water and low fertilizer (I2F2),low water and high fertilizer (I3F1),low water and low fertilizer (I3F2) on soil moisture,soil temperature,water use efficiency and the yield of spring maize. The amount of irrigation water were 400 mm(I1),300 mm(I2) and 200 mm(I3), respectively. The two fertilization levels were 600 kg·hm-2 diamine phosphate plus 300 kg·hm-2 urea(F1), 300 kg·hm-2 diamine phosphate plus 150 kg·hm-2 urea (F2), respectively. The results showed that the irrigation had great influence on soil water and temperature properties. Soil temperature decreased significantly while soil water content increased significantly after each irrigation. The 300 mm of irrigation resulted in the highest soil temperature in every layer throughout the growing season that was 0.1℃ and 0.6℃ higher than that of I3 and I1,respectively. The soil water content of I2F2 was 8.3% and 9.2% lower than that of I1F1 and I1F2,respectively and was 1.6%,11.1% and 14.1% higher than that of I2F1,I3F1 and I3F2,respectively, which provided a good soil water and temperature environment for crop growth and development. The treatment of I2F2 also significantly improved the yield of maize that was significantly higher by 33.80% compared with I3F2 and 21.95% compared with I3F1,but,no significant difference over high water treatment I1. The soil water,soil temperature,yield of spring maize, and water use efficiency in I2F2 treatment were optimal for the production of spring maize under plastic-mulching ridge-furrow irrigation in the Hetao Irrigation District. |
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