Nitrogen Uptake and Utilization in Wheat as Influenced by Pig Slurry from Large-scale Pig Farm
Author(s): TAO Xiao-ting, ZHU Zheng-jie, GAO Wei, MIAO Cui-yun, WANG Yuan-ling, Huang Li-feng, ZHUANG Heng-yang, LU Jian-fei, Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Shanghai Farm of the Bright Food CO., LTD
Pages: 555-561
Year: 2014 Issue: 3
Journal: Agro-Environmental Protection
Keyword: pig slurry; wheat; nitrogen nutrition; uptake and utilization;
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-1of total nitrogen, 540 mg·L-1of available nitrogen and 779 mg·L-1of 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, <5.0×10-4mg·L-1, 0.063 mg·L-1, 0.028 3 mg·L-1, and <5×10-4mg·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-2during overwintering period instead of applying 30～60 kg N·hm-2of 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-2followed by 90 kg·hm-2chemical fertilizer at panicle formation stage significantly reduced nitrogen use efficiency.
Pages: 555-561
Year: 2014 Issue: 3
Journal: Agro-Environmental Protection
Keyword: pig slurry; wheat; nitrogen nutrition; uptake and utilization;
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-1of total nitrogen, 540 mg·L-1of available nitrogen and 779 mg·L-1of 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, <5.0×10-4mg·L-1, 0.063 mg·L-1, 0.028 3 mg·L-1, and <5×10-4mg·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-2during overwintering period instead of applying 30～60 kg N·hm-2of 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-2followed by 90 kg·hm-2chemical fertilizer at panicle formation stage significantly reduced nitrogen use efficiency.
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