作物学报2017，Vol.43Issue(4)：558-570,13.DOI:10.3724/SP.J.1006.2017.00558
淮北地区氮肥群体最高生产力水稻钾素吸收利用特征
Potassium Absorption and Utilization Characteristics of Rice Varieties with the Highest Population Productivity under Corresponding Nitrogen Fertilization in Huaibei Area
摘要
Abstract
A 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 the relationship be-tween potassium and yield. According to the highest population productivity under corresponding N fertilization, rice varieties were classified into four types including top type (TT), high type (HT), middle type (MT), and low type (LT). Yield components, and K absorption and translocation of the four types of rice variety were compared. K concentration of aboveground parts of plant steam-sheath and leaf in different types was the highest at heading stage and that was higher in TT than the other three types. K concentration of panicle was no significant difference among tested varieties. With increasing productivity level, total K accumu-lation increased. From transplanting to jointing stage, the K accumulation in LT was 120.56 kg ha–1, accounting for 50.56%. The K accumulation of TT was 108.02 kg ha–1, accounting for 35.99%. After jointing, the K accumulation and ratio at each growth stage of TT were higher than those of other three types. The K uptake rate showed a trend of MT > LT > HT > TT from trans-planting to jointing stage, and TT > HT > MT > LT from jointing to heading stage and from heading to maturity stage. K translo-cation and K translocation efficiency of leaf were obviously higher than those of stem-sheath. K translocation of TT and HT's K translocation efficiency were both the highest. The increasing in K of panicle increased with increasing productivity level. From heading to maturity stage, K translocation conversion rate of vegetative organ was the highest in LT, medium in MT, and the low-est in TT. Internal nutrient efficiency and K requirement for 100 kg grain among four types were no obvious difference and K partial factor productivity and harvest index of K showed a trend of TT > HT > MT > LT. In conclusion, the higher the production level, the higher the potassium use efficiency of plants and organs at the middle and later periods of development. Maintaining high K uptake and translocation efficiency after heading is an important characteristic of high-yield rice varieties.关键词
中熟中粳/生产力/钾素积累/钾素转运Key words
Medium-maturing medium Japonica/Productivity/K accumulation/K translocation引用本文复制引用
梁健,任红茹,夏敏,李晓峰,陈梦云,李军,张洪程,霍中洋..淮北地区氮肥群体最高生产力水稻钾素吸收利用特征[J].作物学报,2017,43(4):558-570,13.基金项目
本研究由国家科技支撑计划项目(2013BAD07B09, 2016YFD0200805),江苏省科技计划项目(BE2015340, BE2016351)和江苏省农业三新工程项目(SXGC[2016]321)资助. This study was supported by the National Key Technology Support Program (2013BAD07B09, 2016YFD0200805), the Science and Tech-nology Plan of Jiangsu Province (BE2015340, BE2016351), and Three New Agricultural Engineering Fund of Jiangsu Province (SXGC [2016]321). （2013BAD07B09, 2016YFD0200805）
