作物学报2016，Vol.42Issue(1)：123-130,8.DOI:10.3724/SP.J.1006.2016.00123
播期、密度和施氮量对稻茬小麦光明麦1号氮肥表观利用率的调控
Effects of Sowing Date, Density and Nitrogen Application Amount on Nitrogen Utilization Rate of Guangmingmai 1 Grown in Rice-Wheat System
摘要
Abstract
Improvement of utilization rate of nitrogen fertilizer (NUR) is one of research focuses in wheat. In a two-year field experiment, the NUR of wheat variety Guangmingmai 1 in the wheat–rice rotation system in response to sowing date (S), density (D), and nitrogen application rate (N) was studied using a mathematical model based on quadratic regression rotation-orthogonal combination design. Among the three factors, nitrogen application rate had the greatest effects on NUR, followed by sowing date and density. Several S+D+N combinations resulted in high yield and high NUR under the experimental conditions. The highest yield level (6800–7200 kg ha–1) was obtained in the combination of S between October 28 and November 2, D between 1.6 and 1.8 million plants per hectare, and N at 200 kg ha–1. Simultaneously, the NUR was higher than 42.0%(the maximum was 44.8%) with a credibility larger than 95%. At the yield level of 6200–7000 kg ha–1 and NUR higher than 41.0%, the optimal S, D and N were 21–27 October, 1.2–1.5 million plants per hectare and 190–225 kg ha–1, respectively. At the yield level of 5900–7250 kg ha–1 and NUR higher than 39.0%, the agronomic practices were recommended to be S between November 3 and November 11, D be-tween 2.1 and 2.4 million plants per hectare, and N between 190 and 210 kg ha–1.关键词
稻-麦轮作制/氮肥表观利用率/小麦产量/农艺措施组合Key words
Rice-wheat rotation system/Utilization rate of nitrogen fertilizer/Wheat yield/Combination of agronomic practices引用本文复制引用
徐晖,崔怀洋,张伟,丁锦峰,李春燕,郭文善,朱新开..播期、密度和施氮量对稻茬小麦光明麦1号氮肥表观利用率的调控[J].作物学报,2016,42(1):123-130,8.基金项目
本研究由国家自然科学基金项目(31271642),农业部行业科研专项(201503130),国家科技支撑计划项目(2013BAD07B09),江苏省高校自然科学基金重大项目(13KJA210004),江苏高校优势学科建设工程项目和江苏扬州农业科技攻关项目(YZ2014166)资助。This study supported by the National Natural Science Foundation of China (31271642), the Special Scientific Research Fund of the Ministry of Agriculture (201503130), the National Key Technology Support Program of China (2013BAD07B09), the University Natural Science Foundation of Jiangsu Province (Key Program 13KJA210004), the Priority Academic Program Development of Jiangsu Higher Education Institutions, and Agricultural Scientific and Technological Key Project of Yangzhou (YZ2014166) （31271642）
