Fates of 15N-labeled fertilizer in a black soil-maize system and the response to straw incorporation in Northeast China
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Over-fertilization has caused low nitrogen (N) use efficiency and N pollution in China. A better understanding of the fate of fertilizer N is critical for improved appropriate N management practices.
Materials and methods
We examined the fate of urea-N applied to a typical black soil-maize system and the response to straw incorporation in Northeast China using the field 15N labeling technique. Large plots (25 m2) were used to reduce artificial disturbance and facilitate multiple samplings in one growing season.
Results and discussion
We found that of the applied N (200 kg N ha−1), 52% was taken up by crops at harvest and 24% was retained in the soil (0–40 cm). The unrecovered 23% was likely lost via gases emission or leaching, which mainly occurred in the early days of maize cultivation. Fertilizer N contributions to the crop N uptake were 42% during vegetative growth and 30% during reproductive growth, which indirectly indicates that native soil N was the dominant N source for maize growth. However, high N uptake by maize resulted in low replenishment of fertilizer N to soil N. As a potential nutrient management approach, straw incorporation (2.4 t ha−1) stimulated N retention and reduced N loss, with 14% unrecovered fertilizer N.
To maintain long-term soil N supplies, straw incorporation could be a valid agronomic practice to prevent the degradation of black soil because of long-term N depletion during maize cultivation in Northeast China.
Keywords15N labeling Mollisol Allocation Fertilizer-derived N Nitrogen use efficiency
We thank Dr. Hongguang Cai, Dr. Yang Wang, and Xuegong Yan in Jilin Academy of Agricultural Sciences for their help with field sampling. We also thank Xiaoming Fang, Meixia Gao, Linlin Song, and Ying Tu in Institute of Applied Ecology, CAS for their help with sample processing and laboratory analysis.
This study was grateful supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (grant number: XDB15020200), the National Natural Science Foundation of China (grant number: 41701309; 31422009).
- Alkanani T, MacKenzie AF (1996) Banding urea and lignosulfonate in corn (Zea mays L.) production and 15N recovery. Can J Soil Sci 76:365–371Google Scholar
- Gao LW, Ma L, Zhang WF, Wang FH, Ma WQ, Zhang FS (2009) Estimation of nutrient resource quantity of crop straw and its utilization situation in China. Trans CSAE 25:173–179 (in Chinese with English abstract)Google Scholar
- Heffer P, Prud’homme M (2015) Fertilizer outlook. International Fertilizer Association (IFA), Paris, pp 2016–2020Google Scholar
- Ju XT (2014) The concept and meaning of nitrogen fertilizer availability ratio—discussing misunderstanding of traditional nitrogen use efficiency. Acta Pedo Sin 51:921–933 (in Chinese with English abstract)Google Scholar
- Ku H (1966) Notes on the use of propagation of error formulas. J Res Natl Bur Stand 70:263–273Google Scholar
- Ma L (2008) Mechanism and regulatory strategies of nitrogen flow in food chain of China. Agricultural University of Hebei, Ph.D. thesisGoogle Scholar
- Pan JR, Ju XT, Liu XJ, Chen XP, Zhang FS, Mao DR (2009a) Fate of fertilizer nitrogen for winter wheat/summer maize rotation in North China Plian under optimization of irrigation and fetilization. J Nucl Agr Sci 23:334–340 (in Chinese with English abstract)Google Scholar
- Wang XY, Peng YJ, Wang W, Liu XY, Ju XT, Zhang LJ (2014) Exploration of N fertilizer fate and quantitative soil nitrogen pool budget in growing season of summer maize in North China plain. Ecol Environ Sci 23:1610–1615 (in Chinese with English abstract)Google Scholar
- Xu MJ, Zhang L, Wang XY, Peng YJ, Zhang LJ, Ju XT (2015) Effects of different management patterns on uptake, distribution and fate of nitrogen in summer maize. J Plant Nutr Fert 21:36–45 (in Chinese with English abstract)Google Scholar
- Yu W, Zhou H, Ma Q, Shen S (2010) Effect of N fertilizer on uptake of soil N by crops with special discussion on fertilizer nitrogen recovery rate. Acta Pedologica Sinica 47:90–96 (in Chinese with English abstract)Google Scholar
- Zhang FS, Wang JQ, Zhang WF, Cui ZL, Ma WQ, Chen XP, Jiang RF (2008) Nutrient use eficiencies of major cereal crops in China andd measures for improvement. Acta Pedo Sin 45:915–924 (in Chinese with English abstract)Google Scholar
- Zhong Q (2004) Studies of nitrogen environmental endurance of winter wheat/summer maize rotation system in North China Plain. In: Master thesis. China Agricultural UniversityGoogle Scholar
- Zhu ZL (2008) Research on soil nitrogen in China. Acta Pedologica Sinica 45:778–783 (in Chinese with English abstract)Google Scholar