CAJ | 학술논문

为探究大豆品种在遗传改良过程中根系伤流液含氮化合物的变化规律，以吉林省1923-2009年间育成的29个大豆品种为材料，在不同生育时期测定根系伤流液中的硝态氮、铵态氮以及游离氨基酸（FAA）的浓度、总量。结果表明：大豆根系伤流液中含有大量的FAA；大豆品种的遗传改良增加了根系伤流液中硝态氮、FAA的浓度和总量，但铵态氮的浓度有所降低，其总量随着育成年代的变化不显著；同一大豆品种根系伤流液中的氮浓度随着生育时期的推进而降低，氮总量由于受到其浓度和伤流强度的共同影响，表现为R4期最高，R2期次之，R6期最低。由此说明大豆品种的遗传改良提高了根系伤流液中含氮化合物的水平，R2期氮代谢最为旺盛，是大豆需氮的关键时期，应注意合理追施氮肥。
위탐구대두품충재유전개량과정중근계상류액함담화합물적변화규률，이길림성1923-2009년간육성적29개대두품충위재료，재불동생육시기측정근계상류액중적초태담、안태담이급유리안기산（FAA）적농도、총량。결과표명：대두근계상류액중함유대량적FAA；대두품충적유전개량증가료근계상류액중초태담、FAA적농도화총량，단안태담적농도유소강저，기총량수착육성년대적변화불현저；동일대두품충근계상류액중적담농도수착생육시기적추진이강저，담총량유우수도기농도화상류강도적공동영향，표현위R4기최고，R2기차지，R6기최저。유차설명대두품충적유전개량제고료근계상류액중함담화합물적수평，R2기담대사최위왕성，시대두수담적관건시기，응주의합리추시담비。
In order to understand the changes of nitrogen compounds in root bleeding sap during the genetic improvement of soybean varieties,29 soybean varieties bred in Jilin Province during 1923 -2009 were used to measure the concentration and total amount of nitrate,amide and free amino acids (FAA)in root bleeding sap at different growth stages.The result showed that there were great amount of FAA in soybean root bleeding sap;the concentration,total amount of nitrate and FAA increased with genetic improvement of soybean cultivars,while the amide concentration decreased and the change of the total amount was not significant with year of release.Nitrogen concentration in root bleeding sap of the same soybean variety decreased with the proceeding of growth stage.The maximum total nitrogen amount was at R4 stage,the second was at R2 stage and the minimum was at R6 stage.It was concluded that genetic improvement of soybean varieties improved the level of nitrogen compounds in root bleeding sap,and nitrogen metabolism was the most vigorous at R2 stage.R2 stage was the critical period requiring extra nitrogen and the nitrogen fertilizer reasonably should be applied at this period.