灌溉排水学报2017，Vol.36Issue(10)：39-45,7.DOI:10.13522/j.cnki.ggps.2017.10.008
分蘖期和幼穗分化期旱涝急转对超级杂交早稻产量和品质的影响
Effect of a Sudden Change from Drought to Waterlogging at the Tilleringor Young Spiking Stage on Yield and Grain of Hybrid Rice
摘要
Abstract
The effect of drought-flooding alternation on yield and grain quality of hybrid early rice was studied in this paper. We took Ganxin203 variety as the model plant, growing it in pots. Different drought-flooding alterna-tions were examined:drought without flooding, flooding without drought, and a sudden change from drought to flooding attilleringor young spiking stage respectively. The results showed that a sudden change from drought to flooding at the tillering stage had a small impact on rice quality, and that the only difference was in the chalkiness of the rice which, in the treatment, was significantly lower than that in the control (without drought and flooding). However, a quick switch from drought to flooding at young spiking stage significantly reduced the head rice rate, grain length and gel consistency by 20.05%, 19.70%and 29.35%, respectively, compared with the control. There was no significant difference in amylose content, compared with the control. A sudden change from drought to flooding increased chalky grain rate and chalkiness by 5.64%and 20.39%respectively, while decreased the ap-pearance, processing quality and taste of the rice. The drought and flooding resulted in yield loss per plant; a change from drought to flooding at tillering and young spiking stage led to a reduction in yield by 30.27%and 43.37%. Water stress at tillering stage mainly resulted in an decrease in the number of grains per panicle and over-all panicles per plant, while water stress at young spiking stage led to a decrease in total number of grains per pan-icle and the maturing rate. Overall, a sudden change from drought to flooding at young spiking stage detrimental-ly affects rice production.关键词
超级杂交早稻/分蘖期/幼穗分化期/旱涝急转/品质/产量Key words
super hybrid early rice/tillering stage/young panicle differentiation stage/drought-flooding alterna-tion/quality/rice yield分类
农业科技引用本文复制引用
熊强强,沈天花,钟蕾,陈小荣,朱昌兰,彭小松,贺浩华..分蘖期和幼穗分化期旱涝急转对超级杂交早稻产量和品质的影响[J].灌溉排水学报,2017,36(10):39-45,7.基金项目
国家自然科学基金项目(314771441,30860136) （314771441,30860136）
江西省科技支撑项目(2010BNA03600) （2010BNA03600）
江西省教育厅项目(GJJ14283) （GJJ14283）
