Carbon and nitrogen allocations in corn grown in Central and Northeast China: different responses to fertilization treatments
文献类型: 外文期刊
作者: Mia Hui-tian;Lu Jia-long;Mia Hui-tian;Xu Ming-gang;Zhang Wen-ju;Huang Shao-min;Peng Chang;Chen Li-ming
作者机构:
关键词: long-term fertilization;corn;carbon allocation;nitrogen allocation
期刊名称: JOURNAL OF INTEGRATIVE AGRICULTURE
ISSN: 2095-3119
年卷期: 2015 年 14 卷 6 期
页码:
收录情况: SCI
摘要: In order to reveal the impact of various fertilization strategies on carbon (C) and nitrogen (N) accumulation and allocation in corn (Zea mays L.), corn was grown in the fields where continuous fertilization management had been lasted about 18 years at two sites located in Central and Northeast China (Zhengzhou and Gongzhuling), and biomass C and N contents in different organs of corn at harvest were analyzed. The fertilization treatments included non-fertilizer (control), chemical fertilizers of either nitrogen (N), or nitrogen and phosphorus (NP), or phosphorus and potassium (PK), or nitrogen, phosphorus and potassium (NPK), NPK plus manure (NPKM), 150% of the NPKM (1.5NPKM), and NPK plus straw (NPKS). The results showed that accumulated C in aboveground ranged from 2550-5630 kg ha(-1) in the control treatment to 9300-9 610 kg ha(-1) in the NPKM treatment, of which 57-67% and 43-50% were allocated in the non-grain organs, respectively. Accumulated N in aboveground ranged from 44.8-55.2 kg ha(-1) in the control treatment to 211-222 kg ha(-1) in the NPKM treatment, of which 35-48% and 33-44% were allocated in the non-grain parts, respectively. C allocated to stem and leaf for the PK treatment was 65 and 49% higher than that for the NPKM treatment at the both sites, respectively, while N allocated to the organs for the PK treatment was 18 and 6% higher than that for the NPKM treatment, respectively. This study demonstrated that responses of C and N allocation in corn to fertilization strategies were different, and C allocation was more sensitive to fertilization treatments than N allocation in the area.
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