CAJ | 학술논문

在大青山南麓浅山地带的阳坡造林地,使用Li-6400便携式光合测定仪对不同土壤水分处理下的油松和山杏苗木的光合生理参数进行了测定,研究了叶片净光合速率（Pn）、羧化效率（Ce）、蒸腾速率（Tr）、水分利用效率（WUE）对土壤含水量（SWC）的响应过程,并探讨了在不同土壤水状况下2个树种叶片光合作用的变化规律,最后确定了2个树种在大青山南麓阳坡适宜生长的土壤水分范围。研究表明：油松和山杏叶片Pn最高时的SWC临界值分别为17.9%和18.4%;Tr最高时的SWC临界值分别为18.7%和17.1%;维持叶片水分利用效率最高时的SWC临界值分别为14.66%和13.15%。选择维持最高叶片水分利用效率的SWC临界值和维持最高净光合速率的SWC临界值作为林木生长适宜的土壤水分范围,则油松和山杏生长适宜的土壤水分范围分别为14.66%～17.9%和13.15%～18.4%。
재대청산남록천산지대적양파조임지,사용Li-6400편휴식광합측정의대불동토양수분처리하적유송화산행묘목적광합생리삼수진행료측정,연구료협편정광합속솔（Pn）、최화효솔（Ce）、증등속솔（Tr）、수분이용효솔（WUE）대토양함수량（SWC）적향응과정,병탐토료재불동토양수상황하2개수충협편광합작용적변화규률,최후학정료2개수충재대청산남록양파괄의생장적토양수분범위。연구표명：유송화산행협편Pn최고시적SWC림계치분별위17.9%화18.4%;Tr최고시적SWC림계치분별위18.7%화17.1%;유지협편수분이용효솔최고시적SWC림계치분별위14.66%화13.15%。선택유지최고협편수분이용효솔적SWC림계치화유지최고정광합속솔적SWC림계치작위림목생장괄의적토양수분범위,칙유송화산행생장괄의적토양수분범위분별위14.66%～17.9%화13.15%～18.4%。
Li-6400 portable photosynthesis system was used to measure the photosynthetic parameters of Pinus tabulaeformis and Prunus armeniaca planted in the sunny slope in Daqing Mountains.The water use efficiency（WUE） was calculated according to WUC=Pn/Tr.The response processes of some parameters to SWC were studied,including net photosynthetic rate（Pn）,carboxylation efficiency（Ce）,transpiration rate（Tr）,water use efficiency（WUE）.The effects of different soil water stress on the photosynthesis and the fitting range of SWC of the two trees species were explored and got.The results showed that when the highest Pn was coming forth,corresponding thresholds of SWC to Pinus tabulaeformis and Prunus armeniaca were 17.9% and 18.4% respectively;when the highest Tr was coming forth,they were 18.7% and 17.1% respectively.The fitting ranges of SWC to Pinus tabulaeformis and Prunus armeniaca were 14.66%~17.9% and 13.15%~18.4% respectively.