| Photosynthetic parameters and water use efficiency of wheat and maize under different rates of N, P and K |
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| DOI：10.7606/j.issn.1000-7601.2016.03.08 |
| Key Words: nutrient ratio irrigation amount wheat maize water use efficiency |
| Author Name | Affiliation | | YANG Yong-hui | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | WU Ji-cheng | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | PAN Xiao-ying | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | ZHANG Jie-mei | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | HAN Wei-feng | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | WANG Zhe | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | WANG Yue | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China | | HE Fang | Institute of Plant Nutrition & Resource Environment, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture, Yuanyang, Henan 453514, China |
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| Abstract: |
| Field experiment was conducted to explore the mechanism of photosynthesis and water use efficiency of wheat and maize, under different N, P, and K rates of the same irrigation condition. The results showed that: the reasonable irrigation and fertilization in key growth stage of wheat and maize can promote and synchronize the water and nutrient uptake, improve the photosynthetic physiological characteristics, promote water-saving and increase crop yield. Different N, P, and K treatments significantly increased photosynthetic rate and leaf water use efficiency, And the photosynthetic rate and leaf water use efficiency of N3P2K2 treatment was the highest. Meanwhile, different ratios of N, P, and K nutrition increased the yield component of wheat and maize. Finally, the water use efficiency and yield were the best for N2P2K2 and N3P2K2 treatments. However, the recommended NPK ratio for high profit was N2P2K2. |
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