贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2014年
7期
39-42
,共4页
杨雨华%宗建伟%岳汉秋%梁亚红%杨风岭
楊雨華%宗建偉%嶽漢鞦%樑亞紅%楊風嶺
양우화%종건위%악한추%량아홍%양풍령
核桃%西林2 号%光合日变化%环境因子
覈桃%西林2 號%光閤日變化%環境因子
핵도%서림2 호%광합일변화%배경인자
Juglans regia%Xilin2%diurnal changes of photosynthesis%environmental factors
为核桃的栽培及资源开发提供理论依据,采用 Li-6400便携式光合测定仪对西林2号核桃光合日变化进行测定,并在此基础上采用相关分析方法对其光合日变化规律与环境因子的关系进行定量分析。结果表明:西林2号核桃叶片的净光合速率(Pn)日变化有明显的波峰与波谷,在14:00左右出现最低值,有明显的午休现象。气孔导度(Gs)日变化随时间呈不断下降趋势,但一天内变化的幅度不同,以8:00-10:00降幅较大,为73.69%,而10:00之后变化较为平稳。胞间CO2浓度(Ci)日变化呈现下降-升高-下降-升高的趋势,在10:00和16:00出现波谷,分别为14.2393μmol/mol和22.2917μmol/mol。叶片温度(Tleaf)和水分饱和蒸汽压亏缺(Vpdl)日变化均呈现上升-下降的态势,全天出现单峰曲线,在14:00均出现最大值,分别为43.73℃和7.8875 kPa。Pn与PAR、Ca和RH呈显著正相关(p<0.05),与Ta呈显著负相关(p<0.05)。Ta与RH呈极显著负相关(p<0.01),与Vpdl、Tleaf呈极显著正相关(p<0.01)。Ca与Gs呈极显著正相关(p<0.01)。RH与Gs呈显著正相关(p<0.05),与Vpdl呈显著负相关(p<0.05)。
為覈桃的栽培及資源開髮提供理論依據,採用 Li-6400便攜式光閤測定儀對西林2號覈桃光閤日變化進行測定,併在此基礎上採用相關分析方法對其光閤日變化規律與環境因子的關繫進行定量分析。結果錶明:西林2號覈桃葉片的淨光閤速率(Pn)日變化有明顯的波峰與波穀,在14:00左右齣現最低值,有明顯的午休現象。氣孔導度(Gs)日變化隨時間呈不斷下降趨勢,但一天內變化的幅度不同,以8:00-10:00降幅較大,為73.69%,而10:00之後變化較為平穩。胞間CO2濃度(Ci)日變化呈現下降-升高-下降-升高的趨勢,在10:00和16:00齣現波穀,分彆為14.2393μmol/mol和22.2917μmol/mol。葉片溫度(Tleaf)和水分飽和蒸汽壓虧缺(Vpdl)日變化均呈現上升-下降的態勢,全天齣現單峰麯線,在14:00均齣現最大值,分彆為43.73℃和7.8875 kPa。Pn與PAR、Ca和RH呈顯著正相關(p<0.05),與Ta呈顯著負相關(p<0.05)。Ta與RH呈極顯著負相關(p<0.01),與Vpdl、Tleaf呈極顯著正相關(p<0.01)。Ca與Gs呈極顯著正相關(p<0.01)。RH與Gs呈顯著正相關(p<0.05),與Vpdl呈顯著負相關(p<0.05)。
위핵도적재배급자원개발제공이론의거,채용 Li-6400편휴식광합측정의대서림2호핵도광합일변화진행측정,병재차기출상채용상관분석방법대기광합일변화규률여배경인자적관계진행정량분석。결과표명:서림2호핵도협편적정광합속솔(Pn)일변화유명현적파봉여파곡,재14:00좌우출현최저치,유명현적오휴현상。기공도도(Gs)일변화수시간정불단하강추세,단일천내변화적폭도불동,이8:00-10:00강폭교대,위73.69%,이10:00지후변화교위평은。포간CO2농도(Ci)일변화정현하강-승고-하강-승고적추세,재10:00화16:00출현파곡,분별위14.2393μmol/mol화22.2917μmol/mol。협편온도(Tleaf)화수분포화증기압우결(Vpdl)일변화균정현상승-하강적태세,전천출현단봉곡선,재14:00균출현최대치,분별위43.73℃화7.8875 kPa。Pn여PAR、Ca화RH정현저정상관(p<0.05),여Ta정현저부상관(p<0.05)。Ta여RH정겁현저부상관(p<0.01),여Vpdl、Tleaf정겁현저정상관(p<0.01)。Ca여Gs정겁현저정상관(p<0.01)。RH여Gs정현저정상관(p<0.05),여Vpdl정현저부상관(p<0.05)。
In order to provide a theoretical basis for cultivation and resource development of J .regia Xilin 2,the diurnal changes of photosynthesis were measured by using Li-6400 portable photosynthesis system,the relationship between photosynthetic parameters and environmental factors was quantitively analyzed by using correlation analysis methods.Results:The diurnal changes of net photosynthetic rate (Pn)of J.regia exhibited significant peaks and troughs,the lowest value appeared at about 14:00,there was a clear"lunch break"phenomenon.Diurnal changes of stomatal conductance (Gs)was declining over time.However,the magnitude of change in one day was different in a decrease of 73.69% during 8:00-10:00 ,but after 10:00 declined more stable.Diurnal changes of intercellular CO2 concentration (Ci) showed a downward-rise-fall-rising trend,trough appeared at 10:00 and 16:00,which were 14.239 3μmol/mol and 22.291 7μmol/mol respectively.Diurnal changes of leaf temperature (Tleaf)and water vapor pressure deficit (Vpdl)showed a decrease after the first rising trend,appeared unimodal,both appeared in the 14:00 maximum,which were 43.73℃ and 7.887 5 kPa respectively.PAR,Ca and RH were significantly positively correlated with Pn (p<0.05),Pn was significantly negatively correlated with Ta (p<0.05).There was a significant negative correlation between Ta and RH (p<0.01),Vpdl and Tleaf were of a significant positive correlation with Ta(p<0.01).Ca was highly significantly positively correlated with Gs (p<0.01).RH was of a significant positive correlation with Gs (p<0.05),However, RH and Vpdl showed a significant negative correlation (p<0.05).