Introduction Experiment Of Acer Rubrum

This paper based on the introduction and cultivation test of the direct introducedAcer rubrum L. from Canada in Anhui Shucheng，analyzed the ecological adaptability ofthis species on the introduction area， researched the physiological， biochemical andecological factors which impacted the growth and ornamental effect after introduction. Atthe same time，the survival rate，growth index，phenology，photosynthesis physiologyindex and the index of leaf color expression are measured，the main results are as follows:（1） The investigation shows that：The Acer rubrum L.survival rate was60.2%，it canpreliminary judgment that: possibly due to differences factors in temperature，moistureand soil planting environment，the Acer rubrum L. seed survival rate introduction to themiddle and lower reaches of Yangtze river，was lower than in America report.Due to theintroduction summer temperature has10℃higher than the origin, the light intensity issignificantly enhanced，the survival rate is lower in summer.（2） After sugar maple introduction to the Yangtze River area, it’s germination periodand growth period are postponed for origin area about15³0d, growth period is longer thanthe origin about1month. Introduction, Acer rubrum L. sprout in late March, bud in Apriland it’s samara is red. By the middle of April,new leaves became red, and then, the youngleaves and reddish Samara become dark green. Fruit ripening period in The late May,Samara gradually shedding in the early6. Leaf color is dark green in summer.10monthslate, as the temperature decreases, the Acer rubrum L.leaf color becomes yellow, purple,red and other colors, rich colors. By November, the leaf color is the most beautiful, the besttime of leaves viewing period. With the temperature decreasing, leaves fall off graduallyin early December, then into the dormancy stage. It is concluded that: as introducing’sannual average temperature is higher than the provenance’s, the effective accumulatedtemperature is higher,growing period and blooming period is prolonged. During thecultivation and management of that, should strengthen the sunscreen drought and droughtresistance management.（3） The height growth curve and the Collar diameter growth curve of Acer rubrum L.basically meets logistic curve, height and Collar diameter growth period is basically thesame, The growth period can be divided into4stages: emergence period （before April1st）,early growth period （April1st^June5th）, the fast-growing period （June5th^August13th）and late growth period （August13th^November22nd）. In the summer, the Collardiameter growth period usually ended after15days then the high growth period.（4） In the spring, summer and autumn, the trend of Acer rubrum L. photosynthetic rate of the day basically showed as double hills curve, but the peak time appearedinconsistent: in different seasons, Acer rubrum L., photosynthetic noon break phenomenonAppeared at the highest temperature and light intensity. The strongest positive correlationbetween photosynthesis and Gs, PAR is the most significant positive correlation, negativecorrelation with Ci. Conclusion: the Acer rubrum L.photosynthesis can work normallyunder the weak light, when the light was the strongest,the photosynthesis rate was thelowest, that can explain Acer rubrum L.has strong inhibitory effect of light, it is a kind ofrelatively shade-tolerant plant, which can be planted in the middle of green preparation ofplant communities（5） Analysis3different seedling ages Acer rubrum L.（annual, three years and fiveyears） relationship between leaf color change and various pigment.The result show: thelaw of3different seedling ages leaf coloring change in autumn is regularity, leaves arebasically from green to pale and then red （or yellow）, but the start time and duration aredifferent, the seven years leaf color change earliest, color ornamental effect is the best,three year old maple leaves have the fastest color stage, and and the rapid deciduousperiod, annual red maple leaves change color effect, the deciduous period also late.（6） The content of chlorophyll a, chlorophyll b decreased from5.0mg·g^-1Fw to0.6mg·g^-1Fw,,carotenoid Decreased from3.67mg·g^-1Fwto0.27mg·g^-1Fw, anthocyaninshowed a decrease in initial, then increased gradually, In the range of9.3-43.61.At the end ofOctober,the relative content of anthocyanin increased significantly. with the increase ofleaf color from green to red, the PAL activity of3different seedling ages Acer rubrum L.autumn leaf color variation increases.the activity of PAL in succession to the peak in themiddle of October, then gradually decreased. Through simple correlation analysis betweenthe physiological indexes of autumn leaf color changes,the results show that: during theautumn leaf color changes, the content of chlorophyll a, chlorophyll b, total chlorophyll,carotenoid had very significant positive correlation, and anthocyanin relative content wasextremely significant positive correlation, but shows negative correlation with anthocyanincontendent. The correlation with soluble sugar content and PAL was not significant. It candraw that the result of Acer rubrum L. autumn leaf color change is mainly by coaction ofchlorophyll content and anthocyanin.