| Effects of planting density and cultivar on grain yield and water use efficiency of summer maize |
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| DOI：10.7606/j.issn.1000-7601.2018.06.04 |
| Key Words: summer maize cultivar planting density grain yield water use efficiency |
| Author Name | Affiliation | | GAO Fan | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semi-arid of Ministry of Education, Yangling,Shaanxi 712100, China
Institute of Water Conservation in Dryland, Yangling, Shaanxi 712100, China | | HU Tian-tian | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semi-arid of Ministry of Education, Yangling,Shaanxi 712100, China
Institute of Water Conservation in Dryland, Yangling, Shaanxi 712100, China | | YAO De-long | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semi-arid of Ministry of Education, Yangling,Shaanxi 712100, China
Institute of Water Conservation in Dryland, Yangling, Shaanxi 712100, China | | LIU Jie | College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semi-arid of Ministry of Education, Yangling,Shaanxi 712100, China
Institute of Water Conservation in Dryland, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Effects of cultivar and planting density on grain yield and water use efficiency(WUE) of summer maize were assessed to improve the grain yield and WUE by optimizing the combination of cultivar and planting density.Field experiments were conducted and three planting densities, 67 500,75 000 and 82 500 individual·hm-2 were set for ten summer maize cultivars Zhengdan 958,Tunyu 808,Xianyu 335, Xianyu 1266, Jundan 29, Shandan 226,Shandan 609,Yanke 288, Xinong 211 and Huanong 138. The split-plot experiment design was taken to explore the change rules of grain yield, biomass, total water consumption and WUE.The results showed that increasing planting density would affect summer maize grain yield and WUE. The highest average grain yield was 7 954 kg·hm-2 and the highest average WUE was 22.1 kg·hm-2·mm-1 when the density was 82 500 individual·hm-2. The effect of planting density on yield and WUE of summer maize cultivars varied. The density-tolerance of Tunyu 808 and Xinong 211 was the best and the worst respectively. The cultivars with high WUE had grain yield. It was an efficient way to increase planting density appropriately and select high density-tolerance cultivars to save water and improve grain yield in Guanzhong plain. Both grain yield andWUE would be the highest to plant Tunyu 808, Huanong 138, Xianyu 1266 and Shandan 609 at the density of 82 500 individual·hm-2 and plant Zhengdan 958 at the density of 75 000 individual·hm-2 under the current experimental condition. |
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