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| Responses of Phosphorus Use Efficiency, Grain Yield, and Quality to Phosphorus Application Amount of Weak-Gluten Wheat |
| ZHU Xin-kai, JIANG Zong-qing, FENG Chao-nian, GUO Wen-shan, PENG Yong-xin |
| Key Laboratory of Crop Genetics and Physiology, Jiangsu Province/Wheat Research Institute, Yangzhou University, Yangzhou 225009, P.R.China |
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摘要 Phosphorus (P) is one of the most widely occurring nutrients for development and growth of wheat. In this study; the effects of P application amount on grain yield; protein content; and phosphorus use efficiency (PUE) were studied by agronomic management of P fertilizer on spring weak-gluten wheat (Triticum aestivum L.) grown under field conditions for yr. The experiments were performed at five levels of PO application amount; including ; ; ; ; and kg ha-. As a result; with increase in P fertilizer; grain yield; and P agricultural efficiency (AEP) increased in a quadratic equitation; but partial factor productivity of P (PFPP) decreased in a logarithmic eq. When kg ha- PO was applied; the grain yield reached the highest level; but the protein content in gain was lower than .%; a threshold for the protein content to evaluate weak-gluten wheat suitable for production of cake and biscuit. Yangmai and Ningmai could tolerate to higher P level of soils than Yangmai that had more loss in grain yield when P fertilizer was over-applied. AEP had a concomitant relationship with grain yield and was a better descriptor for P use efficiency in the wheat. A high P use efficiency resulted in leaf area index (LAI); increased chlorophyll content and photosynthetic rate; and stable acid phophatase (APase) activity to accumulate more dry matter after anthesis; which explained that the optimum P fertilizer increased grain yield and improved grain quality of weak-gluten wheat.
Abstract Phosphorus (P) is one of the most widely occurring nutrients for development and growth of wheat. In this study; the effects of P application amount on grain yield; protein content; and phosphorus use efficiency (PUE) were studied by agronomic management of P fertilizer on spring weak-gluten wheat (Triticum aestivum L.) grown under field conditions for yr. The experiments were performed at five levels of PO application amount; including ; ; ; ; and kg ha-. As a result; with increase in P fertilizer; grain yield; and P agricultural efficiency (AEP) increased in a quadratic equitation; but partial factor productivity of P (PFPP) decreased in a logarithmic eq. When kg ha- PO was applied; the grain yield reached the highest level; but the protein content in gain was lower than .%; a threshold for the protein content to evaluate weak-gluten wheat suitable for production of cake and biscuit. Yangmai and Ningmai could tolerate to higher P level of soils than Yangmai that had more loss in grain yield when P fertilizer was over-applied. AEP had a concomitant relationship with grain yield and was a better descriptor for P use efficiency in the wheat. A high P use efficiency resulted in leaf area index (LAI); increased chlorophyll content and photosynthetic rate; and stable acid phophatase (APase) activity to accumulate more dry matter after anthesis; which explained that the optimum P fertilizer increased grain yield and improved grain quality of weak-gluten wheat.
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Received: 15 April 2011
Accepted:
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| Fund: This work was supported by the National Natural Science Foundation of China (30971729), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China, and the Science and Technology Support Program of Jiangsu Province, China (BE2009426). |
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Corresponding Authors:
ZHU Xin-kai, Tel/Fax: +86-514-87979300, E-mail: xkzhu@yzu.edu.cn
E-mail: xkzhu@yzu.edu.cn
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Cite this article:
ZHU Xin-kai, JIANG Zong-qing, FENG Chao-nian, GUO Wen-shan, PENG Yong-xin.
2012.
Responses of Phosphorus Use Efficiency, Grain Yield, and Quality to Phosphorus Application Amount of Weak-Gluten Wheat. Journal of Integrative Agriculture, 12(7): 1103-1110.
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