Base on above4best mixed types of Cunning-hamia lanceolata with Choerospondias axillaris、Cinnamomum comphora and Sassafras tsumu and Pinus elliottii with Liro den dron chinense were selected out and applying for forestry production.
据此对参试的 混交类型进行优选,选出的最佳 混交类型为杉木+南酸枣、杉木+檫树、杉木+樟树和湿地松+鹅掌楸4个 混交类型,供林业生产上推广应用。
The growth characteristics of young Tilia amurensis (Amur linden) plantation under different sites and mixture types at the same ages were studied by comparing standard plots.
Plantation technique and methods of mixture forest were offered from select species,Mixture methods, mixture type according to ecology climate characters.
We recom-mend that the mixing ratio between Cunninghamia lanceolata and broad-leavedtree species be increased from 3 ∶1 to 4∶1 or 5∶ 1.
Compared with pure forest,the height increases 12% and 11.7%,the diameter increases 17.5% and 11.5% respectively.
马尾松+火力楠和马尾松+杉木两个 混交类型混交效果较好,目的树种马尾松平均树高分别达到3.74 m和3.73 m,平均胸径分别达到4.01 cm和3.89 cm,树高分别比对照纯林提高12%和11.7%,胸径分别比纯林提高17.5%和11.5%。
Integrative Evaluation on Soil Quality and productivity of Populus davidiana Dode Mixed Forest
According to results of investments and studies,there are 4 types of mixed forests in hilly and gully rolling region of loess plateau,including 25 models.
The ratio of energy accumulation was higher, and the rate of energy flow was lower in mixed forest than in pure forest.
表明杉观混交林是一种能量生产力较高和维持地力能力较强的杉阔 混交类型 . 同时 ,混交林的能量累积比大于纯林 ,能量流动速率则低于纯林 ;
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Ikranite is the first purely ring mineral of the eudialyte group (other minerals of this group contain ring platforms of either tetrahedral or mixed types).
And for a perturbation in this set the existence for families of lower-dimensional tori of hyperbolic, elliptic and mixed types has been proved.
The sample size was too small to perform a proper genetic study, though a positive history of epilepsies of mixed types was obtained in 35.7% of the parents and the siblings of the probands.
The differences were statistically significant for emotional and mixed types of disturbance on the RA2, and for emotional and conduct types of disturbance on the RB2.
Kinetic parameters of porcine 5α-reductase in the presence of Serenoa repens extracts revealed uncompetitive, noncompetitive, and mixed types of inhibitions.
The vegetation cover types in the Baohe River basin consist mostly of the mixed forest type (～85%).
The developing process for this important mixed forest type in the study area was systematically established.
The results show the species diversity index of rust fungus is the highest in the mixed forest type, mendium in Birch-poplar forest, Larch plantation and Korean pine plantation, and the lowest in Oak forest.
However, the levels of individual metal concentrations in all the mixture types were below the allowable limits prescribed by several environmental agencies.
Overall, the PERA-TE approach was not effective in predicting the toxicity and interaction of all mixture types and should be limited to assessing mixtures of chemicals with similar modes of action.
Five polymer modified bitumens and three mixture types (dense graded, stone mastic and porous asphalt) were investigated.
Five bitumens from four sources and three different mixture types were studied.
The adopted kinetic schemes explain this effect for the two mixture types.
In most of the cases the affinity sequence of metals was Pb>amp;gt;Cu>amp;gt;Zn>amp;gt;Ni>amp;gt;Cd based on their amount of sorption, which varied little with either metal equilibrating concentrations or the soil/ mixture type.
Each of these locations was not used more than once per soil mixture type.
Therefore, a total of nine tests were performed per mixture type.