广西植物
廣西植物
엄서식물
GUIHAIA
2013年
4期
475-481
,共7页
Guadua amplexifolia%光合日进程%光响应%相关分析%通径分析
Guadua amplexifolia%光閤日進程%光響應%相關分析%通徑分析
Guadua amplexifolia%광합일진정%광향응%상관분석%통경분석
Guadua amplexifolia%diurnal change in net photosynthesis%light response%correlation analysis%path coefficients analysis
为了解国外引进的优良材用竹种Guaduaamplexifolia在引种地福建省华安县的光合适应性,在自然条件下测定该竹种不同季节的光合及相关特征参数,并对不同季节的光合生理参数及其主要环境影响因子进行相关分析和通径分析.结果表明：其光响应特征参数具有明显的季节性差异,光饱和点(LSP)、光补偿点(LCP)、光下暗呼吸速率(Rd)、最大净光合速率(Pnmax)均是7月最高,4月和10月次之,1月最低；四个季节的净光合速率(Pn)日变化均呈双峰型,其中4月“午休”不明显；日均净光合速率4月＞7月＞10月＞1月；除空气相对湿度(RH)外,蒸腾速率(Tr )、胞间 CO2浓度(Ci)、气孔导度(Gs)、饱和水汽压差(VPD)、光合有效辐射(PAR)、叶片温度(Tleaf)等生理因子和环境因子均与净光合速率(Pn)显著相关；不同季节Pn的主要环境影响因子有所差异,1月Tleaf为Pn最大的环境影响因子,而10月RH 的影响则明显增大.综合分析整个生长季节,各测定环境因子对Pn的影响大小顺序为VPD＞PAR＞RH＞Tleaf.
為瞭解國外引進的優良材用竹種Guaduaamplexifolia在引種地福建省華安縣的光閤適應性,在自然條件下測定該竹種不同季節的光閤及相關特徵參數,併對不同季節的光閤生理參數及其主要環境影響因子進行相關分析和通徑分析.結果錶明：其光響應特徵參數具有明顯的季節性差異,光飽和點(LSP)、光補償點(LCP)、光下暗呼吸速率(Rd)、最大淨光閤速率(Pnmax)均是7月最高,4月和10月次之,1月最低；四箇季節的淨光閤速率(Pn)日變化均呈雙峰型,其中4月“午休”不明顯；日均淨光閤速率4月＞7月＞10月＞1月；除空氣相對濕度(RH)外,蒸騰速率(Tr )、胞間 CO2濃度(Ci)、氣孔導度(Gs)、飽和水汽壓差(VPD)、光閤有效輻射(PAR)、葉片溫度(Tleaf)等生理因子和環境因子均與淨光閤速率(Pn)顯著相關；不同季節Pn的主要環境影響因子有所差異,1月Tleaf為Pn最大的環境影響因子,而10月RH 的影響則明顯增大.綜閤分析整箇生長季節,各測定環境因子對Pn的影響大小順序為VPD＞PAR＞RH＞Tleaf.
위료해국외인진적우량재용죽충Guaduaamplexifolia재인충지복건성화안현적광합괄응성,재자연조건하측정해죽충불동계절적광합급상관특정삼수,병대불동계절적광합생리삼수급기주요배경영향인자진행상관분석화통경분석.결과표명：기광향응특정삼수구유명현적계절성차이,광포화점(LSP)、광보상점(LCP)、광하암호흡속솔(Rd)、최대정광합속솔(Pnmax)균시7월최고,4월화10월차지,1월최저；사개계절적정광합속솔(Pn)일변화균정쌍봉형,기중4월“오휴”불명현；일균정광합속솔4월＞7월＞10월＞1월；제공기상대습도(RH)외,증등속솔(Tr )、포간 CO2농도(Ci)、기공도도(Gs)、포화수기압차(VPD)、광합유효복사(PAR)、협편온도(Tleaf)등생리인자화배경인자균여정광합속솔(Pn)현저상관；불동계절Pn적주요배경영향인자유소차이,1월Tleaf위Pn최대적배경영향인자,이10월RH 적영향칙명현증대.종합분석정개생장계절,각측정배경인자대Pn적영향대소순서위VPD＞PAR＞RH＞Tleaf.
Photosynthetic characteristics and main impact factors were measured in different seasons,and the data were analyzed by correlation and path coefficients,and different irradiances were measured in Hua’an County,Fuj ian Province,in order to study Guadua amplexifolia’s photosynthesis characteristic,CO2 assimilation rate on different times in one day.The results indicated that light saturation point (LSP),light compensation point (LCP),dark res-piration rates(Rd),and net photosynthesis at saturation light (Pnmax)all reached highest in July,lower in April and October,the lowest in January.In all seasons but April,daily course of net photosynthesis rate (Pn)had midday-de-pression pattern.The daily mean value of Pn was in the sequence April>July>October>January.All environmental and physiological factors except for relative humidity (RH)had significant correlation with Pn,such as Tr ,Ci,Gs, VPD,PAR,Tleaf and so on.The main environmental factors differed in every season.In January,leaf temperature (Tleaf)was the most important factor to Pn.But the effect of RH increased obviously in October.The effect of tested environmental factor to Pn was in the sequence VPD>PAR>RH>Tleaf in the whole growth period.
