CAJ | 학술논문

以大田引种栽培的羌活植株为材料,用Li-6400便携式光合作用测定系统原位测定自然条件下生长的羌活孕蕾期叶片的光合速率光响应、净光合速率及生理生态因子日变化,并通过相关分析、通径分析和逐步回归分析探讨净光合速率与生理生态因子的关系.结果表明:(1)羌活净光合速率(P_n)、蒸腾速率(T_r)、气孔导度(G_s)日变化均呈双峰曲线,其净光合速率具有典型的"午休"现象,并主要由非气孔限制因素造成;(2)影响羌活叶片Pn日变化的主要决定生理因子是G_s,主要限制因子是胞间CO_2浓度(C_i);主要决定生态因子是空气相对湿度(RH),限制因子是气温(T_a); G_s是影响净光合速率最重要的生理生态因子.研究发现,羌活有较强的适应弱光环境的能力,属于阳性耐荫植物,宜选择海拔和荫蔽度均较高的环境进行引种驯化栽培,以利于其生长和存活.
이대전인충재배적강활식주위재료,용Li-6400편휴식광합작용측정계통원위측정자연조건하생장적강활잉뢰기협편적광합속솔광향응、정광합속솔급생리생태인자일변화,병통과상관분석、통경분석화축보회귀분석탐토정광합속솔여생리생태인자적관계.결과표명:(1)강활정광합속솔(P_n)、 증등속솔(T_r)、기공도도(G_s)일변화균정쌍봉곡선,기정광합속솔구유전형적"오휴"현상,병주요유비기공한제인소조성;(2)영향강활협편Pn일변화적주요결정생리인자시G_s,주요한제인자시포간CO_2농도(C_i);주요결정생태인자시공기상대습도(RH),한제인자시기온(T_a); G_s시영향정광합속솔최중요적생리생태인자.연구발현,강활유교강적괄응약광배경적능력,속우양성내음식물,의선택해발화음폐도균교고적배경진행인충순화재배,이리우기생장화존활.
The response of photosynthetic rate to photosynthetic effective radiation,diurnal change of photosynthetic rate and eco-physiology factors,were analyzed in situ by Li-6400 Portable Photosynthesis Analysis System under natural conditions,relative analysis,path coefficient analysis and stepwise regression equation were used to discuss how related factors influenced diurnal changes of photosynthetic rate.The results showed:(1)The diurnal variation of P_n ,T_r,G_s and PAR varied in a double-peaks curve.There was obvious midday depression of photosynthesis,because of the non-stomata limitation;(2)The main physiological factor affecting the characteristic of P_n of N.incisum was G_s,C_i was the main limiting factor;and the main ecological factor was RH,T_a was the limiting factor,and G_s was the key factor which affected P_n;The results indicated that N.incisum adapt strongly to week light capability.It is a heliophilous plant with strong shade-tolerance,while the higher elevation and shading habitats be suitable to the cultivation of N.incisum in order to grow and survive.