| Effects of N application rates on N balance, grain yield and industrial quality of spring wheat |
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| DOI：10.7606/j.issn.1000-7601.2011.04.17 |
| Key Words: spring wheat N balance grain yield industrial quality |
| Author Name | Affiliation | | LIU Ruliang | Institute of Agricultural Resources and Environment, Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | LI Youhong | Institute of Agricultural Resources and Environment, Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | MA Shiming | Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Agro-environment and Climate Change of the Ministry of Agriculture of China, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | WANG Fang | Institute of Agricultural Resources and Environment, Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | CHEN Chen | Institute of Agricultural Resources and Environment, Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | ZENG Xibai | Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Agro-environment and Climate Change of the Ministry of Agriculture of China, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | BAI Lingyu | Institute of Environment and Sustainable Development in Agriculture/Key Laboratory of Agro-environment and Climate Change of the Ministry of Agriculture of China, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
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| Abstract: |
| Field experiments were conducted with four N level treatments by N0: N 0 kg/hm2, N120: N 120 kg/hm2, N240: N 240 kg/hm2, and N360: N 360 kg/hm2 respectively to study the effects of different N application rates o
n N balance, grain yield and industrial quality of spring wheat in the irrigated areas with the Yellow River water in Ningxia. The results showed that N fertilizer could significantly increase the yield and improve the industrial quality of spring wheat. The grain yield and lysine content were the highest by N240 treatment, but when the amount of N application was greater than 240 kg/hm2, the grain yield and lysine content decreased by 1.9% and 5.5% respectively. Apparent N recovery was decreased with N rates increasing, which was ranged from 18.2%～27.2%. N balance results showed that N apparent losses were ranged from 31.2%～52.1% in treatment N120, N240 and N360. Considering high grain yield, industrial quality, apparent recovery of N fertilizer and low apparent losses rate, the amount of fertilizer N should be controlled under 240 kg/hm2 during the wheat growing period. |
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