东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
2期
1-6
,共6页
李勇%韩海荣%康峰峰%程小琴%刘可%周彬
李勇%韓海榮%康峰峰%程小琴%劉可%週彬
리용%한해영%강봉봉%정소금%류가%주빈
油松人工林%光合作用%人工抚育
油鬆人工林%光閤作用%人工撫育
유송인공림%광합작용%인공무육
Pinus tabulaeformis plantation%Photosynthesis%Artificial tending
采用野外人工抚育干扰方法,设置低、中、高3种强度人工抚育干扰试验组及对照,探讨油松人工林叶片光合作用对环境变化的生理响应。结果表明:人工干扰后主要环境因子(光照强度、空气相对湿度、大气温度、大气CO2摩尔分数)日变化均呈现“单峰”曲线,研究表明光照是限制油松净光合速率的关键因子;人工抚育干扰后,光饱和点、最大净光合速率、净光合速率日均值、暗呼吸、光补偿点均大于对照组,其中光饱和点、最大净光合速率、净光合速率日均值中等强度干扰下最大,且暗呼吸、光补偿点相对于对照组,中等强度干扰下变化最小;表观量子效率、叶绿素a和叶绿素b、总叶绿素质量分数在3种强度干扰下均小于对照组,并且中等强度干扰下最大。
採用野外人工撫育榦擾方法,設置低、中、高3種彊度人工撫育榦擾試驗組及對照,探討油鬆人工林葉片光閤作用對環境變化的生理響應。結果錶明:人工榦擾後主要環境因子(光照彊度、空氣相對濕度、大氣溫度、大氣CO2摩爾分數)日變化均呈現“單峰”麯線,研究錶明光照是限製油鬆淨光閤速率的關鍵因子;人工撫育榦擾後,光飽和點、最大淨光閤速率、淨光閤速率日均值、暗呼吸、光補償點均大于對照組,其中光飽和點、最大淨光閤速率、淨光閤速率日均值中等彊度榦擾下最大,且暗呼吸、光補償點相對于對照組,中等彊度榦擾下變化最小;錶觀量子效率、葉綠素a和葉綠素b、總葉綠素質量分數在3種彊度榦擾下均小于對照組,併且中等彊度榦擾下最大。
채용야외인공무육간우방법,설치저、중、고3충강도인공무육간우시험조급대조,탐토유송인공림협편광합작용대배경변화적생리향응。결과표명:인공간우후주요배경인자(광조강도、공기상대습도、대기온도、대기CO2마이분수)일변화균정현“단봉”곡선,연구표명광조시한제유송정광합속솔적관건인자;인공무육간우후,광포화점、최대정광합속솔、정광합속솔일균치、암호흡、광보상점균대우대조조,기중광포화점、최대정광합속솔、정광합속솔일균치중등강도간우하최대,차암호흡、광보상점상대우대조조,중등강도간우하변화최소;표관양자효솔、협록소a화협록소b、총협록소질량분수재3충강도간우하균소우대조조,병차중등강도간우하최대。
By artificial tending interference, three levels of strength (low, medium and high) of experimental group and control group of artificial tending interference were set to investigate leaf photosynthetic of Pinus tabulaeformis plantation response to the change of environment .After artificial tending interference , the main environmental factors ( photosynthetic active radiation (RPA), air temperature (Ta), air relative humidity (RH) and atmospheric CO2 content) daily present single peak change, and the key factor to limit the net photosynthetic rate of P.tabulaeformis is light (p<0.01).Moreover, light saturation point ( LSP ) , maximum net photosynthetic rate, the mean value of net photosynthetic rate, light compensation point (LCP) and dark respiration (Rd) of the experimental group are greater than those of the control group, and under the medium level of artificial tending interference, the daily means of the first three indices are maximum, but the change of light compensation point (LCP) and dark respiration (Rd) are minimum.Apparent quantum efficiency (α), Chlorophyll a, Chlorophyll b and total chlorophyll of the experimental group are less affected than those of the control group, but the artificial tending interference is the most obvious one under the medium level.