6.7 ha drought-resistant forestation was tested by forestation new material-water storage osmosis film(WSOF)in arid and semi-arid osmosis sand and hills region of Lijia village Dongshan Town 2005.The results showed the WSOF is low in cost,and easy to use. The survival rate could be increased 4%～11%,increased 2～12cm in high growth,increased 0.1～0.3cm in thick growth.
The mean relative precision of DBH,tree height,volume comes to 99.22%,99.73%,98.33% by predicting 32,34 aged forest stand,the results showed that Grey-Markov could be used to predict the growth of L.kaempferi plantation with high precision.
Differences in tree growth among 3 ratios of N,P fertilizer were significant within 3 years after fertilization. Growth decreased with the proportion of N fertilizer increasing and P fertilizer decreasing. By year 1998,the DBH,tree height and volume of B1(the ratio of N,P fertilizer,1∶0) was 5.79%、6.58% and 19.38% respectively higher than that of B3(the ratio of N,P fertilixer,1∶1).
Pmax,LSP,LCP and PR of lower crown of pruned paulowniawere 27.70%,36.74%,34.22% and 36.80% higher than that of the control. But there was no significant difference between two treatments in the upper crown.
In the lower crownof paulownia,Pmax,LSP,LCP and PRof the treated sun leaves were 21.80%,39.02%,28.72% and 39.26% higher than that of the control,and that of the treated shadeleaves were 42.18%,39.35%, 48.70% and 39.13%higher than that of the control. Except LCP,the differences of all the parameters between the two treatments weresignificant.
The soil water content and photosynthetic active radiation cause photosynthetic rate of Ulmus pumila highest is about 17.68%. Photosynthetic active radiation of keeping higher sunshine use efficiency under fitting soil water content is 1 200~1 600 μmol/(m2·s),transpiration rate is higher as higher photosynthetic active radiation under soil moisture.
It can be concluded that the suitable culture condition to produce a high biomass was MT medium supplemented with BA 1.0mg/L, NAA3.0mg/L, sucrose 5 percent and PA0.1 percent for 40～45 days in light culture room.
Germinating seeds were treated with 60Co radiation at 20 Gy30 Gy40 Gy50 Gy60 Gy and 70 Gy for Eucommia ulmoides . The result showed that there was a high variability with 60 Gy radiation by examining the survival rate and morphological variation.
In the interesting case when the group is of Coxeter typeDn (n≥4) we use higher polarization operators introduced by Wallach.
In this paper, we prove three types of rigidity results related to CAT(-1) spaces, namely the rigidity of the isometric actions on CAT(-1) spaces under the commensurability subgroups, the higher rank lattices and certain ergodic cocycles.
Finitely generated profinitely dense free groups in higher rank semi-simple groups
More generally, we prove that if Γ is an irreducible arithmetic non-cocompact lattice in a higher rank group, then Γ containsf·g·p·d·f groups.
Higher-dimensional ball quotients and the invariant quintic
In this paper, some test statistics of Kolmogorov type and Cramervon Mises type based on projection pursuit technique are proposed for testing the sphericity problem of a high-dimensional distribution.
Asymptotic theory for a risk process with a high dividend barrier
Seven topological descriptors are finally selected from 127 topological descriptors by GAPLS method to build a QSRR model with a high regression quality of squared correlation coefficient (R2) of 0.99998 and standard deviation (S) of 2.88.
The blank reference experiment shows that hydrothermal crystallization treatment favors the formation of hexagonal tungsten trioxide, and the tungsten trioxide powder sample prepared by this method has a high degree of crystallinity.
Furthermore, the DNA extracted from the whole blood can be amplified by polymerase chain reaction, which can achieve a high efficiency of the amplification.