干旱区生态环境知识资源中心(Arid): SODm尿素氮减量对河西绿洲灌区春玉米产量效益及氮利用效率的影响

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	SODm尿素氮减量对河西绿洲灌区春玉米产量效益及氮利用效率的影响
其他题名	Effect of SODmN Reduction Application on the Yield, Profit and Nutrient Utilization of Spring Maize in Hexi Oasis Irrigation Area
	崔云玲; 张立勤
来源期刊	云南农业大学学报
ISSN	1004-390X
出版年	2021
卷号	36 期号:2 页码:353-358
中文摘要	【目的】探明新型SODm尿素氮替代普通尿素氮减量对春玉米氮素吸收利用的影响。【方法】通过田间小区试验,以不施氮(CK)和当地常规施氮(CFN)为对照,研究等氮量SODm氮(SODmN)、SODm氮减量10% (SODmN-10%)、SODm氮减量15% (SODmN-15%)、SODm氮减量20% (SODmN-20%)和SODm氮减量25% (SODmN-25%)对春玉米产量效益和氮利用效率的影响。【结果】与CFN处理相比,当SODmN施用量减少15%并继续降低时,玉米产量呈下降趋势,SODmN-15%处理籽粒产量和生物量均相对较高,玉米产量随着氮减量程度的增加表现为先增加后降低,呈二次多项式关系;经拟合,玉米最高产量对应的施氮量为313 kg/hm~2,最高纯收益所对应的施氮量为292 kg/hm~2。氮素的吸收总量表现为先增加后降低,氮收获指数、氮素平衡和氮利用效率(SODmN-25%除外)均随着氮减量程度的增加而增大。【结论】河西绿洲灌区玉米施肥量较高,用SODm尿素氮替代普通尿素氮后出现明显的氮过量,随着氮减量程度的加大,春玉米籽粒产量表现为先增加后降低的趋势,当氮减量超过常规施氮量的20%时产量开始下降,但氮减量25%以内对玉米的产量并没有造成明显影响。在常规施肥基础上用SODm尿素氮替代普通尿素氮,可实现减少氮用量20%的目标,此时产量效益最大化,且氮的利用效率也显著提高。
英文摘要	[Purpose]In order to find out the reduction degree of spring maize after replacement of ordinary nitrogen with new SODmN and the absorption and utilization of nitrogen.[Method]Through the field plot experiment, with no nitrogen application (CK) and local traditional nitrogen application rate (CFN) as the control, the effect of equivalent nitrogen amount SODm nitrogen (SODmN), SODmN decrement 10% (SODmN-10%), SODmN decrement 15% (SODmN-15%), SODmN decrement 20% (SODmN-20%) and SODmN decrement 25% (SODmN-25%) on spring maize yield profit and nitrogen use efficiency was studied.[Results]Compared with the CFN treatment, when the SODmN application rate was reduced by 15% and continued to decrease, the maize yield showed a downward trend. SODmN-15% treatment brought about relatively high grain yield and biological yield, and the maize yield first increased and then decreased with the increase in the degree of nitrogen reduction, showing a quadratic polynomial relationship. After fitting, the nitrogen application rate corresponding to the highest maize yield was 313 kg/hm~2, and the nitrogen application rate corresponding to the highest net income was 292 kg/hm~2. The total amount of absorbed nitrogen was manifested by increase firstly and then decrease. The nitrogen harvest index, nitrogen balance, and nitrogen use efficiency (except SODmN-25%) all increased with the increase in nitrogen reduction. [Conclusion]The fertilizing amount of maize in the Hexi oasis irrigation area was relatively high. After replacement of ordinary nitrogen with SODm nitrogen, significant nitrogen excess appeared. With the increase in nitrogen reduction, the yield of spring maize grains was manifested by a trend of first increase and then decrease. The yield began to decrease when the nitrogen reduction exceeded the conventional nitrogen application rate by 20%, but the nitrogen reduction within 25% did not cause a significant impact on maize yield. Replacement of ordinary urea N with SODmN on the basis of traditional fertilization can achieve the goal of reducing nitrogen rate by 20%, maximizing the yield benefit and significantly improving the nitrogen use efficiency.
中文关键词	绿洲灌区 ; 春玉米 ; 减量施氮 ; 产量效益 ; 氮利用效率
英文关键词	oasis irrigation area spring maize reduced nitrogen application yield and profit nitrogen efficiency
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7065523
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378035
作者单位	崔云玲, 甘肃省农业科学院土壤肥料与节水农业研究所;;农业农村部甘肃耕地保育与农业环境科学观测实验站, ;;农业农村部甘肃耕地保育与农业环境科学观测实验站, 兰州;;武威, 甘肃;;甘肃 730070;;733017, 中国.; 张立勤, 甘肃省农业科学院土壤肥料与节水农业研究所;;农业农村部甘肃耕地保育与农业环境科学观测实验站, ;;农业农村部甘肃耕地保育与农业环境科学观测实验站, 兰州;;武威, 甘肃;;甘肃 730070;;733017, 中国.
推荐引用方式 GB/T 7714	崔云玲,张立勤. SODm尿素氮减量对河西绿洲灌区春玉米产量效益及氮利用效率的影响[J],2021,36(2):353-358.
APA	崔云玲,&张立勤.(2021).SODm尿素氮减量对河西绿洲灌区春玉米产量效益及氮利用效率的影响.云南农业大学学报,36(2),353-358.
MLA	崔云玲,et al."SODm尿素氮减量对河西绿洲灌区春玉米产量效益及氮利用效率的影响".云南农业大学学报 36.2(2021):353-358.