Research On Physiological Roles With High Yield Of Slash Pine's Half-sib

Many countries of the world develop industry forest fast in face of decrease crude forest and fall the gross andquality of forest resource. Slash pine has been planted in tropic and semi-tropical region widely as a fastgrowing pulpwood which introduced from American. Research on physiological roles with high yield of slashpine's half-sib with method of field test and and simulate and utilization instrument mensuration in field andlaboratory.and integration mobilization genetic and breeding of forest and physiology of plant and silvicultureof forest and ecology and dynamic economics and biology statistic and multianalysis in order to realizeintensive management and directional cultivation to industry industry plantation. Quantitative analysis ismain.The result can provide theory and technology for genetic improvement adjusting and controlling high yieldcultivation measurement on choiceness families of slash pine's plantation.This result is concluded below:The 7 choiceness families such as 0-1027,0-464, II -101,2-46,0-609,0-508, 0-1077 of slash pine's pulpwood isselected by index of restriction and nonrestraint consider of growth and form and timber character.The drought resistance of Pinus elliottii well-bred genealogy Related thatprotective enzyme systemin have strong scavenging capacity to active oxygen. Under the conditions of waterstress in the SOD, It's no apparent regularity that between varieties on production rate of CAT ,AsA, MDA,and O2-, but have a synchronous. On the one hand , Pinus elliottii genealogy are poisoned by the MDA andO2- as all the families's SOD, CAT, AsA activity are activated and strengthened so that maintain their normalphysiological activities of the plant.Pinus elliottii well-bred genealogy content high sugar and the reduction of soluble sugar wetlands under waterstress; The Chl, Chla, Chlb, Chla / Chlb, Caro of familmly 464,1027 significantly higher than that thecontrol's and the average's under the water stress; The photosynthetic characteristics of Pn, Cond, Tr, CE,Φof family 1027,464significantly higher than that of control and the other family, in the conifer under waterstress as Pinus elliottii well-bred genealogy family-choice physiological indicators. We can use the reductionof sugar, soluble sugar, total chlorophyll content and net photosynthetic rate as the physiological index ofPinus elliottii well-bred genealogy selection.Pinus elliottii well-bred genealogy's Pn typical with weather patterns is changeed in the 'double' type in theMarch to August, the rest of the year that is January, February, September, October, November and Decemberthe Pn variation on the model is 'single '; each of the age of Pinus elliottii genealogy of one-year old coniferand two-year old conifer changed in Season is 'double' type. The net photosynthesis rate of one-year oldconifer and two-year old conifer changed in Season is 'double' type too. The seasonal variation of the rules wasControled by superfacial quantum efficiency and carboxylation efficiency. The Pn of genealogy one-year old conifer is notably higher than that of two-year old ones,and the pn of the dask is the lowest in day. The pn of Pinus elliottii well-bred genealogy has a direct relation with its growth. The pn of one-year old conifer of Pinus elliottii well-bred genealogy distinctively lower than its Amax,and only account for 64.41% of amax. The Pn of two-year old conifer of Slash pine genealogy distinctively lower than its Amax, and only account for54.44%.The photosynthesis parameter of one and two-year old conifer of Pinus elliottii well-bred genealogy,such as superfacial quanta efficiency, carboxylic efficiency, light saturation point,co2 saturation point and so on,are obviously higher than common genus. In Pinus elliottii well-bred genealogy,the light compensate point of two-year old conifer, co2 compensate point of one and two-year old conifer, are lower than that of common genus.it indicates that Pinus elliottii well-bred genealogy has a much better photosynthesis ability even when it is in the condition of weak light and low co2 concentration, it also can get high photosynthesis assimilation when it is in the condition of strong light and high co2 concentration. Feasible moisture and co2 concentration are the main living genes of high yield Slash pine well-bred genealogy. We can use superfacial quanta efficiency and carboxylic efficiency as the physiological index of Pinus elliottii well-bred genealogy selection.