凋落物浸提液对高山松种子萌发和幼苗生长的影响2

[Objective]To further understand the effects of litter extract on seed germination and seedling growth of Pinus korshinskii,and the quality of Pinus korshinskii seeds.[object]]than day mountain,nyingchi nyingchi bridge town,township east east long long bridge,card set groove,DanNian township five mountain pine forests within the sample area as the research object,[method]in the wild samples,back to the lab for test,it is concluded that the data using SPSS and Excel software were analyzed,and explore the litter leaching liquid of sikang pine seed germination and seedling growth.[Results]](1)There were significant differences in the germination rate of different litter concentrations among different points(P<0.05).In all the control groups,the germination rate of DD sample was as high as 94.67%,followed by that of LL sample was 93.00%,and that of BK sample was the lowest(71.00%).(2)BK sample seeds in 5%concentration under the processing of the germination index increased the most,are characterized by RI>0.2,the allelopathy of germination potential,germination index and response index between 0.3～0.5,shows that this processing of BK sample seed germination under a moderate role in promoting,at the same time germination index has a tendency to decrease with the increase of concentration.(3)There was a weak inhibition effect(RI=0.2)on the germination rate of seeds from BB sample sites under the treatment of extraction solution.With the increase of concentration,the inhibition tended to be stronger but not obvious,and the inhibition intensity reached the maximum under 20%treatment.The germination indexes of DZ seeds also showed slight inhibition under the treatment.Different from BB,the inhibition of seeds in DZ sample spots only began at 15%,and the inhibition intensity reached the maximum at 25%treatment and showed an upward trend.The results of LL sample seeds were different from the former.The inhibition effect of each germination index reached the maximum(RI=-0.32)under the treatment of 5%concentration,and the inhibition effect reached a medium degree,and the inhibition effect gradually decreased with the increase of the concentration,and changed to a slight promotion effect under the treatment of 25%concentration.[Conclusion]In general,root length,stem length and needle length showed a tendency of allelopathic inhibition,and decreased with the increase of the concentration of aqueous extract.However,the responses of different seeds and various organs of seeds to the extract were different.The root length had the largest response,followed by diameter length,and needle length had little change with the concentration of aqueous extract.