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引用本文:晏军,顾闽峰.盐土条件下不同品系藜麦生理特性和产量指标对花期渍水胁迫的响应[J].灌溉排水学报,0,():-.
YAN Jun,Gu Min-feng.盐土条件下不同品系藜麦生理特性和产量指标对花期渍水胁迫的响应[J].灌溉排水学报,0,():-.
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盐土条件下不同品系藜麦生理特性和产量指标对花期渍水胁迫的响应
晏军, 顾闽峰
江苏沿海地区农业科学研究所新洋试验站
摘要:
【目的】藜麦具有营养价值高、适应性广和耐逆性强等特性,探索盐土环境下藜麦花期遭受渍水胁迫下的响应机制,对沿海滩涂地区藜麦的引进、选育和推广种植具有重要意义。【方法】以我单位自主选育的4个藜麦品系(SL21、SL44、SL24和SL45)为材料,采用盆栽实验,研究了盐土环境下藜麦花期对不同渍水持续天数(4、8和12 d)的生理特性和产量构成响应,并明确了排水指标。【结果】盐土环境下,随着渍水时间的增加,藜麦叶片的MDA含量呈增加趋势,Chl(a+b)、SP、SS、光合指标参数(Pn、Tr、Gs、Ci)和叶绿素荧光参数(Fv/Fo、Fv/Fm)含量均呈降低趋势。渍水4 d后,4个品系MDA含量显著均高于CK,SL44的Chl(a+b)、SP含量相较CK未显著降低,而SL21和SL24的Chl(a+b)和SS含量显著低于CK,除SL 44外,其他3个品系Tr均显著降低,但4个品系的Fv/Fo和Fv/Fm未受到显著影响。渍水持续12 d后,4个品系的各项生理指标均显著低于CK,藜麦生理代谢遭到严重破坏。在产量构成上,每株主穗产量占总产量的65%以上,4个品系在渍水4 d后单株总产量均显著降低,单株总产量表现为SL 44>SL 21>SL 24>SL 45,在渍水8 d后主穗产量和千粒质量显著低于CK,渍水持续12 d后,分枝产量绝收。【结论】在沿海地区引进藜麦种植,要选择地势相对较高、排水条件好的农田,SL 44的耐渍性相对较好,若以藜麦减产15%~20%作为排水控制标准,花期允许的渍水时间为3.2 d~4.1 d。
关键词:  藜麦; 渍水; 生理特性; 产量;排水指标
DOI:
分类号:S513; S276.1
基金项目:
Response of Physiological Characteristics and Yield of Different Quinoa Strains to Waterlogging Stress at Flower Stage under Saline-soil Conditions
YAN Jun, Gu Min-feng
Xinyang Experimental Station of Jiangsu Institute of Agricultural Sciences in Coastal Areas
Abstract:
【Objective】Quinoa has the characteristics of high nutritional value, wide adaptability and strong stress tolerance, etc. It is of great significance to explore the response mechanism of quinoa under waterlogging stress at anthesis for the introduction, selection and popularization of quinoa in the coastal beach area.【Method】Based on 4 quinoa strains(SL21, SL44, SL24, SL45), pot experiments were carried out to study the response of physiological characteristics and yield components of quinoa at anthesis to waterlogging duration(4, 8, 12 d) in saline soil environment, and the drainage indexes were determined.【Result】The results showed that the MDA content of quinoa leaves increased, and the contents of Chl (a + b), SP, SS, photosynthetic parameters (Pn, Tr, Gs, Ci) and chlorophyll fluorescence parameters (Fv/Fo, Fv/Fm) decreased with the increase of waterlogging time. After waterlogging for 4 days, the MDA content of four strains was significantly higher than CK, the Chl (a + b) and SP content of SL44 were not significantly lower than CK, but the Chl (a + b) and SS content of SL21 and SL24 were significantly lower than CK, except for SL44, the Tr of other three strains were significantly reduced, but Fv/Fo nd Fv/Fm of four strains were not significantly affected. After waterlogging for 12 days, the physiological indexes of four lines were significantly lower than CK, and the physiological metabolism of quinoa was seriously damaged. In terms of yield composition, the main spike yield of each plant accounted for more than 65% of the total yield, and the total yield of each plant of four strains decreased significantly after 4 days of waterlogging, the total yield of each plant was SL 44 > SL 21 > SL 24 > SL 45, and the main spike yield and 1000 grain quality were significantly lower than CK after 8 days of waterlogging. After 12 days of waterlogging, the branch yield was cut off.【Conclusion】To sum up, the key to planting quinoa in coastal areas is to select farmland with relatively high terrain and good drainage conditions, SL 44 was relatively good resistance to waterlogging damage, if the quinoa yield reduction of 15% to 20% as a drainage control standard, the allowed time of waterlogging at anthesis is 3.2 ~ 4.1 days.
Key words:  Quinoa; Waterlogging; Physiological characteristics; Yield; Drainage index