An economic and viable approach to improve wheat quality in Qinghai–Tibetan Plateau,China |
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| Authors: | WANG Yu-jiao TAO Zhi-qiang WANG De-mei WANG Yan-jie YANG Yu-shuang ZHAO Guang-cai SHI Shu-bing CHANG Xu-hong |
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| Affiliation: | 1 College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, P.R.China
2 Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology, Ministry of Agriculture and Rural Affairs, Beijing 100081, P.R.China |
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| Abstract: | Wheat flour products are the main dietary component of the Qinghai–Tibetan Plateau (QTP) population in China. However, the high altitude restricts the local wheat quality and quantity, and the applied nitrogen rate is higher than the optimal rate for wheat planting. In this study, we considered whether reducing the amount of nitrogen fertilizer and introducing the superior varieties from the North China Plain (NCP) are viable ways to increase the wheat quality and quantity in the QTP. Three and four winter wheat cultivars from QTP and NCP, respectively, were planted in Lhasa at an altitude of 3 647 m with reduced topdressing nitrogen application at the jointing stage. The wheat from NCP exhibited higher grain hardness index and test weight, and better flour and dough quality. Reducing the topdressing nitrogen fertilizer from 135 to 75 kg N ha?1 at the jointing stage (with the same basal fertilization of 105 kg N ha?1) did not significantly (P<0.05) affect the grain yield, grain quality, flour quality or dough quality in any of the cultivars. In summary, introducing high-quality winter wheat varieties from the NCP to the Lhasa plateau is a viable way to enhance the wheat supply and quality in the QTP. Reducing a certain amount of the nitrogen fertilizer is an economic and feasible approach for the QTP region. |
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| Keywords: | variety introduction wheat quality high altitude nitrogen |
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