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探明同种植物在不同生境条件下的生长发育特性是实现高品质植物配置与造景的有效途径.以四川省成都市温江区温江公园(W)、光华大道(G)、四川农业大学成都校区四教B区(B)及C区(C)4个试验点成年蓝花楹(Jacaranda mimosifolia D.Don)为研究试材,采用数字式照度计测量同一时段不同生境下以及不同时段不同生境下的光照强度,同时测定叶绿素a(Chl a)、叶绿素b(Chl b)和类胡萝卜素(Car)含量.结果显示:在观测期内蓝花楹的叶绿素含量及组分因生境条件不同而各异,在各生境下Chl a约占总量的79%,与Chl总量的相关性达到极显著水平(R~2=0.88,P<0.001);Chl b约占总量的21%,与Chl总量的相关性也达到极显著水平(R~2=0.81,P<0.001),但不及Chl a.在开花物候期内,各生境下光照强度对光合色素含量的影响也不一致,表现出光照强度显著高于B、C而树龄低于W的G,其Chl、Chl a、Chl b、Car含量皆显著低于C、B、W(P<0.05).在开花的物候表现上,经历萌芽、抽梢、展叶后约40d,太阳辐射强度日均总量2 100 W/m~2或在当日12:00-14:00辐射强度达到或大于470 W/m~2并持续4 d以上的蓝花楹即可进入开花状态.本研究表明,在蓝花楹开花物候期前后光照强度对其开花有显著影响,开花物候表现与光合色素含量及变化无关系.
It is an effective way to realize the growth and development of plants of the same species in different habitats.With the help of Wenjiang Park (W), Guanghua Avenue (G) and Sichuan Agricultural University in Chengdu, Sichuan Province, The four experimental sites of B (B) and C (C) in the four experimental zones of the campus were Jacaranda mimosifolia D. Don, and the digital illuminometer was used to measure the change of habitat in different habitats and in different habitats (Chl a), chlorophyll b (Chl b) and carotenoid content were determined.The results showed that the content of chlorophyll and the components of the blue flower were different due to different habitat conditions during the observation period Chl a accounted for 79% of the total in all habitats, and the correlation with Chl was extremely significant (R ~ 2 = 0.88, P <0.001); Chl b accounted for 21% of the total, (R ~ 2 = 0.81, P <0.001), but less than Chl a. The photosynthetic pigment content in different habitats during the flowering phenophase was also inconsistent, and the correlation between Chl and total chlorophyll content was not significant The light intensity was significantly higher than the B, C and the age below W G, Chl, Chl a, Chl b, Car content was significantly lower than the C, B, W (P <0.05) .In the flowering phenology, the average daily solar radiation intensity was 2 100 W / m ~ 2 or about 12: 00-14 : 00 The flowering state was reached when the blue-sky flower whose radiation intensity reached or exceeded 470 W / m ~ 2 for more than 4 d.The results showed that the light intensity had a significant influence on the flowering before and after the flowering phenophase, Phenological phenomena and photosynthetic pigment content and changes have nothing to do.