CAJ | 학술논문

通过人工气候箱模拟中国南方稻区湖北荆州地区大气CO2浓度和温度同时升高的3种气候情景,即在背景温度为24～29℃的人工气候箱中设置以CO2浓度为400μmol?mol?1、升温0℃为对照（CK），以550μmol?mol?1、升温2℃为中强度处理（M），以700μmol?mol?1、升温4℃为高强度处理（H），将催芽后的稻种于各气候箱中处理10d，观测水稻种子萌发和幼苗生理特性的变化。结果表明，（1）水稻幼苗苗高、根长、根数（根长大于1cm）、根苗干重及活力指数均随着CO2浓度和温度的同时升高而上升，其中H处理下幼苗苗高比CK长5.78cm，根长比CK高12.91%，根苗干重为CK的2.6倍，活力指数为CK的3.1倍，种子发芽率、发芽势和发芽指数表现为M处理最高；（2）随着CO2浓度和温度同时升高，稻苗丙二醛（MDA）含量和可溶性糖（SS）逐渐降低，脯氨酸（Pro）含量先增加后减小，可溶性蛋白（SP）含量和过氧化氢酶（CAT）逐渐升高。说明在目前温度和CO2浓度条件下未来升温2～4℃同时CO2浓度增至550μmol?mol?1和700μmol?mol?1对湖北荆州稻区水稻种子萌发和幼苗生长不会产生明显不利影响，但此生长期稻苗营养元素累积受到制约。
통과인공기후상모의중국남방도구호북형주지구대기CO2농도화온도동시승고적3충기후정경,즉재배경온도위24～29℃적인공기후상중설치이CO2농도위400μmol?mol?1、승온0℃위대조（CK），이550μmol?mol?1、승온2℃위중강도처리（M），이700μmol?mol?1、승온4℃위고강도처리（H），장최아후적도충우각기후상중처리10d，관측수도충자맹발화유묘생리특성적변화。결과표명，（1）수도유묘묘고、근장、근수（근장대우1cm）、근묘간중급활력지수균수착CO2농도화온도적동시승고이상승，기중H처리하유묘묘고비CK장5.78cm，근장비CK고12.91%，근묘간중위CK적2.6배，활력지수위CK적3.1배，충자발아솔、발아세화발아지수표현위M처리최고；（2）수착CO2농도화온도동시승고，도묘병이철（MDA）함량화가용성당（SS）축점강저，포안산（Pro）함량선증가후감소，가용성단백（SP）함량화과양화경매（CAT）축점승고。설명재목전온도화CO2농도조건하미래승온2～4℃동시CO2농도증지550μmol?mol?1화700μmol?mol?1대호북형주도구수도충자맹발화유묘생장불회산생명현불리영향，단차생장기도묘영양원소루적수도제약。
Future climate change tends to be with features of CO2 concentration and temperature increasing, which will produce significant influence on agriculture. This paper mainly focused on the effect of CO2 concentration and temperature increasing on rice seedling physiological characteristics of rice in southern China by simulating 3 climate scenarios, i.e., CO2 concentration 400μmol?mol?1 and increasing 0℃ as control treatment (CK), 550μmol?mol?1 and increasing 2℃compared with CK as middle treatment (M), 700μmol?mol?1 and increasing 4℃ compared with CK as high treatment (H). The seeds were placed into different treatments about 10 days after soaking and accelerating germination, then monitored relevant indexes of seed germination and physiological characteristics. The results showed that (1) as CO2 concentration and temperature increasing simultaneously, the height of seedling, the length of root, the number of root longer than 1cm, and dry weight of root and seedling and vigor index increased. Compared with CK, under H, height of rice seedling was higher 5.78cm, root length was 12.91% longer, dry weight of root and seedling was 2.6 times than CK, vigor index was 3.1 times than CK; germination vigor, germination rate and germination index achieved highest in medium treatment; (2)Along with CO2 concentration and temperature increasing simultaneously, malonicdial dehyde (MDA) content and soluble sugars (SS) content were gradually decreasing, proline (Pro) content was highest in medium treatment, soluble protein (SP) content and catalase (CAT) activity were increasing. In general, the future climatic change characteristics of CO2 concentration and temperature increasing simultaneously had no obvious adverse effect on rice germination and seedling growth with CO2 concentration increasing to 550μmol?mol?1 and 700μmol?mol?1, temperature increasing 2-4℃. But the nutrient elements would be limited in germination and seedling period.