Wei Shan Shan, Wang Yan Qun, Li Ying Chun, Shu Xiao Xiao, Peng Zheng Ping, Shi Xin Li, Zhou Ya Peng
College of Resources and Environmental Sciences, Agricultural University of Hebei/Hebei Province Key Laboratory for Farmland Eco-Environment, Baoding 071000, Hebei, China.
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Ying Yong Sheng Tai Xue Bao. 2016 Apr 22;27(4):1163-1168. doi: 10.13287/j.1001-9332.201604.034.
To reduce the NO emission from soil and enhance N utilization by crop, a field experiment was carried out to study the effects of nitrapyrin-N fertilizer application rates (0, 180, 270, 360 kg N·hm) on soil NO emission and N apparent loss, grain yield and N utilization of summer maize. Results showed that the soil NO emission under different N fertilizer treatments mainly occurred in periods from sowing to seedling, and from jointing to tasseling. Soil NO emission peaks were observed after basal and top dressing events. Maize yield increased with N fertilizer rates but there was no significant difference between 270 and 360 kg N·hm, and the net income of these two treatments was 5209 and 5426 yuan·hm, respectively. Compared with no N fertilizer treatment, the N uptake in the N fertilizer treatments was increased by 109.6%-134.1%. The treatment of 270 kg N·hm had the highest agronomic N efficiency and N use efficiency, but the N apparent loss was low. The treatment with nitrapyrin-N fertilization rate of 270 kg N·hm appeared to be the optimal rate to obtain high maize yield and N use efficiency, and low soil NO emission and N apparent loss.
为减少土壤中一氧化氮排放并提高作物对氮的利用率，开展了一项田间试验，研究添加硝化抑制剂的氮肥施用量（0、180、270、360千克氮·公顷）对夏玉米土壤一氧化氮排放、氮素表观损失、籽粒产量和氮素利用率的影响。结果表明，不同氮肥处理下土壤一氧化氮排放主要发生在播种至苗期以及拔节至抽雄期。在基肥和追肥后观察到土壤一氧化氮排放峰值。玉米产量随氮肥用量增加而提高，但270和360千克氮·公顷处理之间无显著差异，这两个处理的纯收入分别为5209元和5426元·公顷。与不施氮肥处理相比，氮肥处理的氮吸收量增加了109.6% - 134.1%。270千克氮·公顷处理的农学氮肥效率和氮肥利用率最高，但氮素表观损失较低。270千克氮·公顷的添加硝化抑制剂的氮肥施用量处理似乎是获得高玉米产量和氮素利用效率、低土壤一氧化氮排放和氮素表观损失的最佳用量。
