作物学报2016，Vol.42Issue(6)：909-916,8.DOI:10.3724/SP.J.1006.2016.00909
豫中地区冬小麦临界氮稀释曲线与氮营养指数模型的建立
Simulating Critical Nitrogen Dilution Curve and Modeling Nitrogen Nutrition Index in Winter Wheat in Central Henan Area
摘要
Abstract
To test the applicability of critical nitrogen dilution curve for estimating nitrogen (N) nutrient status of winter wheat in central Henan area, we carried out a site-fixed experiment from October 2011 to June 2014 using the large-spike variety Zhoumai 16 and the multi-spike variety Yumai 49-198. Five N application levels, namely pure N 0, 120, 180, 240, and 360 kg ha-1, were designed to build the critical N concentration dilution curve of shoot biomass and N nutrition index model. The aboveground biomass increased obviously with rising N level and then tended to a mild level. The relationship between critical N concentration and shoot biomass of wheat fit the power function with R2 of 0.8203 for Yumai 49-198 and 0.7981 for Zhoumai 16 (P<0.01). These models showed good stability across years. The N nutrition index estimated by the model could be used for evaluating the N nutrition situation of wheat plants, and a significant linear correlation was observed between the N nutrition index and the ni-trate concentration in wheat stem base. These results indicate that the critical N concentration dilution model is applicable in di-agnosing N nutrient status of wheat plants in central Henan area.关键词
小麦/临界氮稀释曲线/氮营养指数/茎基部硝酸盐Key words
Wheat/Critical nitrogen dilution/Nitrogen nutrition index/Stem sap nitrate引用本文复制引用
岳松华,刘春雨,黄玉芳,叶优良..豫中地区冬小麦临界氮稀释曲线与氮营养指数模型的建立[J].作物学报,2016,42(6):909-916,8.基金项目
本研究由国家自然科学基金项目(31471935)和国家公益性行业(农业)科研专项(201103003)资助。This study was supported by the National Natural Science foundation of China (31471935) and the Special Fund for Agro-scientific Research in the Public Interest (201103003) （31471935）
