作物学报2016，Vol.42Issue(8)：1188-1200,13.DOI:10.3724/SP.J.1006.2016.01188
淮北地区水稻品种氮肥群体最高生产力及氮素吸收利用特性
Yield, Nitrogen Absorption and Utilization of Rice Varieties with the Highest Population Productivity of Nitrogen Fertilization in Huaibei Area
摘要
Abstract
The field experiment was carried out using 34 medium-maturing mediumjaponica rice varieties grown in Huaibei area with seven nitrogen application levels (0, 150.0, 187.5, 225.0, 262.5, 300.0, and 337.5 kg ha–1) to investigate their yield and nitrogen absorption and utilization. We defined the highest rice yields under different nitrogen levels as the highest population productivity of N fertilization. According to the highest population productivity of N fertilization, rice varieties were classified into four types includ-ing top type (TT), high type (HT), middle type (MT), and low type (LT). Yield components, population photosynthate production and N absorption and utilization of the four types rice varieties were compared. The main results indicated that optimum N levels of tested varieties corresponding to their highest population productivity of N fertilization converged in the range of 225.0-300.0 kg ha–1, while the highest grain yields were significantly different among tested varieties. With increasing productivity level, panicles per unit area increased firstly and decreased then, spikelets per panicle and total spikelet number increased and seed-setting rate declined percent-age of productive tillers, leaf area index, photosynthetic potential, ratio of leaf area of productive tillers, ratio of leaf area from flag leaf to 3rd leaf, grain-leaf ratio and total dry matter accumulation increased. The ratio of nitrogen accumulation shown trend of LT > MT > HT > TT from transplanting to jointing stage and TT > HT > MT > LT from jointing to heading stage and from heading to ma-turity stage. N uptake rate was the fastest in the top type, and the slowest in low type and 36.59%, 34.36%, 51.85% higher in top type than in low type at translating to jointing, jointing to heading and heading to maturity growing stages. N use efficiency and N re-quirement for 100 kg kernel increased with increasing productivity level. According to the N use efficiency, 34 varieties were divided into low ANRE (apparent nitrogen recovery efficiency), middle ANRE, higher ANRE and high ANRE. Wuyunjing 27, Zhongdao 1, Ningjing 4, and Lianjing 7 belonged to high yield and high ANRE varieties.关键词
中熟中粳/生产力/产量/氮肥吸收利用Key words
Medium-maturing medium Japonica/Productivity/Yield/Nitrogen absorption and utilization引用本文复制引用
梁健,郭保卫,李军,李晓峰,舒鹏,张洪程,霍中洋,戴其根,许轲,魏海燕..淮北地区水稻品种氮肥群体最高生产力及氮素吸收利用特性[J].作物学报,2016,42(8):1188-1200,13.基金项目
本研究由国家粮食丰产科技工程项目(2011BAD16B03,2013BAD07B09),国家公益性行业(农业)科研专项(20130310),江苏省重点研发项目(BE2015340)和扬州大学科技创新培育基金项目(2015CXJ042)资助。 This study was supported by the National Science and Technology Project of Food Production (2011BAD16B03,2013BAD07B09), the Spe-cial Fund for Agro-scientific Research in the Public Interest (201203102), the Key Projects of Jiangsu Province (BE2015340), and Cultivation of Science and Technology Innovation Fund of Yangzhou University (2015CXJ042) （2011BAD16B03,2013BAD07B09）
