CAJ | 학술논문

本研究以湘早籼45号和陆两优996为材料，研究了不同栽培模式下水稻体内镉（Cd）积累特性及其与光合生理之间的相关性。研究结果表明，在常规水育秧（T1）、软盘育秧（T2）、旱育秧（T3）、直播（T4）4种不同栽培模式下，产量差异达显著水平（P<0.05），2个品种均在直播模式下产量最高；从不同器官来看，镉含量最高的是根系，最高可达10.19 mg·kg-1，其次是茎秆、叶片，稻谷中含量最低；水稻体内重金属镉主要分布在茎秆中，占吸收总量的41.53%~54.67%，稻谷中镉分布量占4.92%~14.36%；直播栽培模式下植株对重金属镉的吸收能力最强，各个器官中的镉均显著高于其他3种栽培模式；光合生理特性与水稻各器官镉含量、积累量具有一定相关性，其中蒸腾速率与稻谷中镉积累量呈显著正相关，相关系数为r=0.684（P=0.029）。
본연구이상조선45호화륙량우996위재료，연구료불동재배모식하수도체내력（Cd）적루특성급기여광합생리지간적상관성。연구결과표명，재상규수육앙（T1）、연반육앙（T2）、한육앙（T3）、직파（T4）4충불동재배모식하，산량차이체현저수평（P<0.05），2개품충균재직파모식하산량최고；종불동기관래간，력함량최고적시근계，최고가체10.19 mg·kg-1，기차시경간、협편，도곡중함량최저；수도체내중금속력주요분포재경간중，점흡수총량적41.53%~54.67%，도곡중력분포량점4.92%~14.36%；직파재배모식하식주대중금속력적흡수능력최강，각개기관중적력균현저고우기타3충재배모식；광합생리특성여수도각기관력함량、적루량구유일정상관성，기중증등속솔여도곡중력적루량정현저정상관，상관계수위r=0.684（P=0.029）。
Relationships between cadmium uptake characteristics and photosynthetic physiology of rice were studied by using Xiangzaoxian 45 and Luliangyou 996 as materials under four cultivation modes:conventional water raised seedling(T1), nursery seedling(T2), dryland raised seedling(T3), direct seeding(T4). The results showed that different cultivation modes had significant effect on the yield of two culti-vars. The cadmium content of different organs followed the sequence of root>stem>leaf>grain. The cadmium uptaked by rice were mainly dis-tributed in the stem, which accounted for 41.53%~54.67%of the gross number, the grain just occupied 4.92%~14.36%. The absorptive ca-pacity of cadmium of direct seeding mode was stronger than the other three modes, and the cadmium content of each organ was higher than the other three cultivation modes significantly. Certain relevance exsisted between photosynthetic physiological characteristics and the cad-mium content, accumulation of each rice organ. There were significant correlation between cadmium content of grain absorbed and transpira-tion rate. The correlation coefficient was r=0.684(P=0.029).