籼粳交超级稻甬优538花后氮素积累模型与特征分析
Dynamic Model and Its Characteristics Analysis for Nitrogen Accumulation after Heading in Yongyou 538
摘要
Abstract
A field experiment was conducted using indica/japonica hybrid super rice Yongyou 538 as the material, conventional ja-ponica rice Zhendao 18 and hybrid indica rice Zhongzheyou 1 as the check to study the characteristics of nitrogen accumulation after heading and compare the differences in characteristics of nitrogen accumulation after heading in different types of rice variety. Results followed that, on an average across two years, grain yield of Yongyou 538 was 12.5 t ha–1, significantly higher than that of check varieties. Nitrogen accumulation at heading, at maturity, and from heading to maturity showed a trend of Yongyou 538>Zhendao 18>Zhongzheyou 1. Nitrogen absorption of 100 kg seeds of Zhendao 18 was the highest, followed by Zhongzheyou 1, and Yongyou 538, while opposite trends was observed for N partial factor productivity. Compared with the check, nitrogen output from stem and nitrogen increase in panicle of Yongyou 538 were consistently higher. Nitrogen accumulation in Yongyou 538 and Zhendao 18 was both higher than that of Zhongzheyou 1 after heading, and Richards' equation was fit to simulate the relationship between nitrogen accumulation and days after heading for three types of rice variety (R2≥0.995). Maximum rate of nitrogen accumulation, mean rate of nitrogen accumulation, and days to maximum rate of nitrogen accumulation after heading in Zhendao 18 were the highest, while those in Yongyou 538 were the lowest. Effective nitrogen accumulation duration showed a trend of Yongyou 538>Zhendao 18>Zhongzheyou 1. Duration days, nitrogen accumulation rate, and nitrogen accumulation in early and late stage of Zhendao 18 were the highest, while those of Yongyou 538 were the lowest. Duration days and nitrogen accumulation in middle stage of Yongyou 538 was consistently higher compared with the check. Our results indicated that greater nitrogen uptake of Yongyou 538 was mainly occurred in the middle stage, which was 86.1%of the nitrogen accumulation from heading to maturity. And higher nitrogen uptake in middle stage after heading of Yongyou 538 was mainly attributed to the longer duration days in this stage.关键词
籼粳交超级稻/品种类型/花后氮素积累Key words
Indica/japonica hybrid super rice of Yongyou series/Different rice type of cultivars/Nitrogen accumulation after heading引用本文复制引用
韦还和,霍中洋,许轲,魏海燕,郭保卫,孟天瑶,李超,张洪程,史天宇,马荣荣,王晓燕,杨筠文,戴其根..籼粳交超级稻甬优538花后氮素积累模型与特征分析[J].作物学报,2016,42(4):540-550,11.基金项目
本研究由农业部超级稻专项(02318802013231),国家公益性行业(农业)科研专项(201303102),宁波市重大科技项目(2013C11001),江苏省重点研发项目(BE2015340)和扬州大学研究生创新培养计划项目(KYLX15_1371),扬州大学科技创新培育基金(2015CXJ042)和基于模型与GIS的高邮市小麦精确管理和诊断调控技术的开发与示范推广(SXGC[2013]248)资助。This study was supported by the Special Program of Super Rice of the Ministry of Agricultural (02318802013231), China Special Fund for Agro-scientific Research in the Public Interest (201303102), the Major Technology Project of Ningbo City (2013C11001), the Key Projects of Jiangsu Province (BE2015340), and Innovative Program for Graduate Students of Yangzhou University (KYLX15_1371), Science and Tech-nology Innovation Fund of Yangzhou University (2015CXJ042), and Precise Diagnosis and Management of Control Technology Based on Modelling and GIS of Gaoyou City (SXGC[2013]248) （02318802013231）
