CAJ | 학술논문

为研究蓄水坑灌条件下苹果树净光合速率（Pn）日变化规律与影响因子之间的关系，在山西省农业科学研究院果树研究所内进行了蓄水坑灌与地面灌条件下净光合速率的对比试验，综合相关分析、通径分析、曲线拟合、多元逐步回归方法对所得数据进行了分析。结果表明：初春季节矮化型苹果树的净光合日变化规律为单峰曲线，峰值出现在9：00；蓄水坑灌下的苹果树净光合速率在1 d 内整体高于地面灌下的净光合速率值，二者相差1．67μmol／（m2·s）；气孔导度是蓄水坑灌条件下矮化型苹果树净光合速率的主要影响因子；地面灌下，饱和水汽压亏缺、气孔导度、大气温度和胞间二氧化碳浓度是直接影响净光合速率的主要因子；综合分析可知，在初春季节，气孔导度是矮化型苹果树净光合最大的影响因子，在水分相对亏缺的条件下，饱和水汽压亏缺也会成为净光合速率的主要影响因子。
위연구축수갱관조건하평과수정광합속솔（Pn）일변화규률여영향인자지간적관계，재산서성농업과학연구원과수연구소내진행료축수갱관여지면관조건하정광합속솔적대비시험，종합상관분석、통경분석、곡선의합、다원축보회귀방법대소득수거진행료분석。결과표명：초춘계절왜화형평과수적정광합일변화규률위단봉곡선，봉치출현재9：00；축수갱관하적평과수정광합속솔재1 d 내정체고우지면관하적정광합속솔치，이자상차1．67μmol／（m2·s）；기공도도시축수갱관조건하왜화형평과수정광합속솔적주요영향인자；지면관하，포화수기압우결、기공도도、대기온도화포간이양화탄농도시직접영향정광합속솔적주요인자；종합분석가지，재초춘계절，기공도도시왜화형평과수정광합최대적영향인자，재수분상대우결적조건하，포화수기압우결야회성위정광합속솔적주요영향인자。
In order to study the relationship between diurnal variation of net photosynthetic rate (Pn)and impact factors under water storage pits irrigation,an experiment work was conducted at Fruit Research Institute in Shanxi Academy of Agricultural Sciences.The data obtained from various methods were analyzed,including correlation analysis,path coefficient analysis,curve fitting and stepwise regression between water storage pits irrigation and ground irrigation.The following results can be obtained:1)The daily variation regularity of Pn for dwarfing apple tree has a single pea at nine o’clock;2)The value of Pn under water storage pits irrigation was greater than the ground irrigation on the whole,with the gap between the two being 1.67μmol/(m2 · s);3)Stomatal conductance was the most important direct factor to influence the variation of Pn under water storage pits irriga-tion.The major factors directly affecting Pn were saturation vapor pressure,stomatal conductance,air temperature and intercellu-lar carbon dioxide concentration.Comprehensive analyses showed that stomatal conductance was the most influential factor to Pn for dwarfing apple tree in early spring,and on the condition of relative moisture stress,while saturation vapor pressure would al-so be a major factor to Pn.