Study On The Relationship Between Canopy Structure And Yield Quality Of ’korla Fragrant Pear’

The test materials of this study were the layered-shaped and open-shaped of Korla Peartrees, mainly analyzes the distribution of the various branches and structural characteristics oftwo tree canopies and canopy in different parts of microclimate differences, proven two treecanopies within different parts of the fruit yield and quality distribution of their differences,study the relationship of micro-climatic factors and fruit yield and quality. The results were asfollows:1. The total number of scaffold branches in the two different tree shapes and mainlydistributed parts were mostly same. The differentiations of the total number of annualbranches were most obvious,but mainly distributed parts were the same. The differentiationsof the total number of perennial branches in the two different tree shapes and mainlydistributed parts were most obvious.2. The LAI of vertical parts of the open-shaped were lower than the same parts of, theLAI of horizontal parts of the canopy peripheral of open-shaped were higher than evacuationlayered shaped, central and bore below the evacuation layered shaped, the average leaf angleand intercepted scattering of open-shaped were bigger than evacuation layered shaped. But inthe range of tree tilt angle advantages, the leaves of chlorophyll content and venetian ofopen-shaped were greater than evacuation layered shaped. The number of flower buds andleaf buds below the evacuation layered shaped.3. The distribution of light intensity in the canopy were gradually increased from inner toouter, lower to upper. And the light intensity in the upper of west was highest, in the lower ofcenter and north were lowest. The light of were evenly distributed, the illuminationdifferences between the different parts were the smaller, the layered-shaped were opposite.With the formed of tree leaf curtain, the changes of seasonal variation of the light intensitywere obvious.4. The tree leaf photosynthesis of open-shaped was greater than the evacuation layeredshaped canopy, the accumulation of photosynthetic products than evacuation layered shapedtrees, the efficiency of light use was higher than the evacuation layered shaped canopy. Theopen-shaped canopy was conducive to improve the appearance of fruit quality and theinternal quality.5. The average fruit yields of open-shaped tree was bigger than layered-shaped. In themiddle layer and periphery of tree canopy, the yield of open-shaped tree was higher than the.But in the upper, lower, middle part and inside of the tree canopy, the layered shaped tree’shigher than the open shaped tree. In summary, the fruit yield and quality of the open shapedtree better than the layered shaped tree.6. The optimal relative light intensity of high quality and yield open-shaped tree in therange of40～66%, temperature in the range of29～35.5℃, relative humidity in the range of40～55%; the optimum relative light intensity of high yield and quality layered-shaped tree inthe range of46～73%, temperature in the range of32～37.5℃, the relative humidity in therange of41～52%.