引用本文:陆晓松,于东升,徐志超,黄晶晶,周聪聪,孙 波.土壤肥力质量与施氮量对小麦氮肥利用效率的综合定量关系研究[J].土壤学报,2019,56(2):487-494. DOI:10.11766/trxb201805170170
LU Xiaosong,Yu Dongsheng,Xu Zhichao,Huang Jingjing,ZHOU Congcong,SUN Bo.Study on Comprehensive Quantitative Relationship of Soil Fertility Quality and Nitrogen Application Rate with Wheat Nitrogen Use Efficiency[J].Acta Pedologica Sinica,2019,56(2):487-494. DOI:10.11766/trxb201805170170
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 521次   下载 588 本文二维码信息
码上扫一扫!
分享到: 微信 更多
土壤肥力质量与施氮量对小麦氮肥利用效率的综合定量关系研究
陆晓松, 于东升, 徐志超, 黄晶晶, 周聪聪, 孙 波
土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)
摘要:
耕地土壤肥力及施氮量对于小麦产量和氮肥利用率均具有重要影响,但它们综合影响的定量关系及相对贡献率并不清楚。在太湖流域常熟市研究区,通过设置不同土壤肥力与施氮量的小麦田间试验,研究施氮量、土壤肥力综合质量指数对小麦产量和氮肥利用率的影响,并利用多元回归方法拟合他们之间的定量关系方程,分析揭示施氮量与土壤肥力综合质量指数对小麦产量和氮肥利用率综合影响的相对贡献率。结果表明,提升施氮量和土壤肥力综合质量指数,有利于增加小麦产量,但不利于小麦氮肥利用率提升;土壤肥力综合质量指数对小麦产量和氮肥利用率的影响大于施氮量,两者对产量和氮肥利用率的相对贡献率比值分别为1.09:1和1.32:1。表明通过提升土壤综合肥力、削减氮肥施用量,达到粮食与生态双重安全目标,培育和提升耕地土壤质量显得更为基本和重要。
关键词:  氮肥利用率  土壤肥力综合质量指数  施氮量  小麦  太湖地区
基金项目:国家重点研发计划专项(2016YFD0200301)、国家自然科学基金项目(41571206)和科技基础性工作专项(2015FY110700-S2)
Study on Comprehensive Quantitative Relationship of Soil Fertility Quality and Nitrogen Application Rate with Wheat Nitrogen Use Efficiency
LU Xiaosong, Yu Dongsheng, Xu Zhichao, Huang Jingjing, ZHOU Congcong, SUN Bo
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
Abstract:
Both soil fertility and fertilizer N application rate (NA) have important influences on yield and fertilizer N use efficiency (NRE) of wheat. However, it is still unclear about quantitative relationship and relative contribution of their comprehensive effects to the latters. A field experiment was conducted in Changshu of the Taihu Basin. It was designed to have plots different in soil fertility and N application rate for wheat growth, and oriented to explore, how NA and integrated quality index of soil fertility (IFI) affect yield and NRE of the crop. Besides, their quantitative relationships were fitted with the multivariate regression method for analysis of relative contribution rate of the comprehensive effect of NA and IFI to yield and NRE of wheat. Results show that higher NA and IFI helps increase wheat yield, but not NRE of the crop, and that IFI was higher than NA in the effect, and their relative contribution rate was 1.09:1 to wheat yield and 1.32:1 to NRE. The findings of the study suggest that to improve comprehensive quality of the soil may achieve the goal of safety for both grain and ecology, while minimizing N application rate. So to build up soil fertility quality of the farmland is more basic and more important in agricultural production.
Key words:  Fertilizer N use efficiency  Integrated quality index of soil fertility  Fertilizer N application rate  Wheat  Taihu Basin