CAJ | 학술논문

对开蕨是国家二级珍稀濒危保护植物，为提高育苗质量，研究了不同空气湿度对其3年生组培苗光合特性的影响，设置4种空气湿度处理，即T1（ CK，RH35％～45％）；T2，RH65％±2％；T3，RH75％±2％；T4，RH85％±2％。结果表明：各处理净光合速率（ Pn ）均在09：00达到最大，之后持续下降，高温可能是主要制约因素；增湿可以有效降低叶片温度（TL），使经加湿处理的各组Pn 日均值均显著高于对照，光补偿点（LC，P）显著降低；其中T2的Pn 日均值、水分利用率（WU，E）显著高于其他处理，LC，P显著低于其他处理。认为4组处理中T2对环境的适应性最好，增加空气湿度至65％时有利于增强对开蕨组培苗的光合作用。
대개궐시국가이급진희빈위보호식물，위제고육묘질량，연구료불동공기습도대기3년생조배묘광합특성적영향，설치4충공기습도처리，즉T1（ CK，RH35％～45％）；T2，RH65％±2％；T3，RH75％±2％；T4，RH85％±2％。결과표명：각처리정광합속솔（ Pn ）균재09：00체도최대，지후지속하강，고온가능시주요제약인소；증습가이유효강저협편온도（TL），사경가습처리적각조Pn 일균치균현저고우대조，광보상점（LC，P）현저강저；기중T2적Pn 일균치、수분이용솔（WU，E）현저고우기타처리，LC，P현저저우기타처리。인위4조처리중T2대배경적괄응성최호，증가공기습도지65％시유리우증강대개궐조배묘적광합작용。
Phyllitis japonica is a species of rare and endangered plant of nationalⅡlevel.We studied the effects of different air humidity on photosynthetic characteristics of its three-years-old tissue culture seedlings to improve the quality of seedlings. Four air relative humidity treatments were T1, (CK, RH 35%-45%), T2, RH (65±2)%, T3, RH (75±2)%, and T4, RH (85±2)%.Each treatment’s Pn reached max value at 9:00, but then decreased, and high temperature may be the main restraining factors.Improving air humidity can effectively decrease TL .The daily average of Pn in humidification treat-ments were significantly greater than that of CK, and LC,P decreased signnificantly.Daily average of Pn and WU,E by T2 were significantly higher than those of other treatments, and LC,P was lower.Therefore, T2 has the best environment adapt-ability.The increased air humidity to 65%can improve photosynthesis of P.aj ponica.