A mating design,including full-sib and half-sib Catalpa bungei was *** germination ability was *** temperature,soaking and lighting time and pretreatment that could influence on Catalpa bungei seed germination were **...
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A mating design,including full-sib and half-sib Catalpa bungei was *** germination ability was *** temperature,soaking and lighting time and pretreatment that could influence on Catalpa bungei seed germination were *** result showed that the difference of germination rate and energy among different mating combinations was extremely *** influence of the individual plant to the germination rate was lower than that of different *** germination rate of the combination *** and *** was always *** germination rate and energy of two set of reciprocal crosses were very *** germination rate was the highest for soaking the seed for 24 hours at a constant temperature of 25 ℃ then germinating it at a changing temperature 20-30 ℃,the difference was *** result,an 8-hour-long lighting daily was more advantaged for the germination of the seed than that in a completely dark condition;the germinating rate of the seed stored at a temperature of 5 ℃ for a week after soaking is also much higher than that stored at a low temperature.
The growth characteristics and correlation between the canopy index and growth characteristics of Populus×xiaohei plantation with different densities and stand ages were studied by the methods of sampling typical...
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The growth characteristics and correlation between the canopy index and growth characteristics of Populus×xiaohei plantation with different densities and stand ages were studied by the methods of sampling typical plot and allometric dimension analysis in Xuejiazhuang Forest Farm in Shanxi *** results showed that the DBHs of Populus×xiaohei plantations with various tree densities were *** Logistic growth model could accurately describe the tree height and DBH growth of Populus×*** fast growing period of tree height was obviously earlier and longer than that of *** dh value decreased with the increase of tree age,the DBH and the tree *** correlation coefficient between tree canopy and the DBH was increased with the tree *** DBH could be estimated by the canopy size in stands with low ***,the medium density Populus×xiaohei plantation should be selected for satellite image interpretation of tree canopy.
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