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| Nitrogen Uptake and Utilization in Wheat as Influenced by Pig Slurry from Large-scale Pig Farm |
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| KeyWord:pig slurry; wheat; nitrogen nutrition; uptake and utilization |
| Author Name | Affiliation | | TAO Xiao-ting | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | ZHU Zheng-jie | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | GAO Wei | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | MIAO Cui-yun | Shanghai Farm of the Bright Food（Group）CO., LTD, Dafeng 224151, China | | WANG Yuan-ling | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | Huang Li-feng | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | ZHUANG Heng-yang | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China | | LU Jian-fei | Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China |
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| Abstract: |
| Pig slurry contains rich plant nutrients and can be applied in crop production, thus reducing uses of chemical fertilizers and protecting the environment. A field experiment was conducted in Dafeng, Jiangsu Province, to evaluate the effects of pig slurry applications combined with chemical fertilizer on nitrogen uptake and use efficiency in wheat. Zhengmai9023, a widely cultivated wheat variety in the south of Huaihe River, was employed. The pig slurry used in the experiment contained 1000 mg·L-1 of total nitrogen, 540 mg·L-1 of available nitrogen and 779 mg·L-1 of extractable phosphorus. The concentration of Cu, Zn, Pb, Cd, Cr, As, and Hg in the pig slurry was 0.246 mg·L-1, 0.577 mg·L-1, 0.041 mg·L-1, <5.0×10-4 mg·L-1, 0.063 mg·L-1, 0.028 3 mg·L-1, and <5×10-4 mg·L-1, respectively, conforming to standards for irrigation water quality. The leaf SPAD values, nitrogen contents, and nitrogen accumulation in wheat plants at jointing, heading and maturing stages were increased with rates of pig slurry. Applying pig slurry at 60~120 m3·hm-2 during overwintering period instead of applying 30~60 kg N·hm-2 of chemical fertilizer at panicle formation stage could meet nitrogen nutrition demand of wheat with higher nitrogen accumulation and utilization efficiency. However, application of pig slurry over 60 m3·hm-2 followed by 90 kg·hm-2 chemical fertilizer at panicle formation stage significantly reduced nitrogen use efficiency. |
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