|Table of Contents|

Light Interception Measurement of Apple Trees Trained to Tall Spindle Shape Based on Three-dimensional Digitizer(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年07期
Page:
9-12
Research Field:
Publishing date:

Info

Title:
Light Interception Measurement of Apple Trees Trained to Tall Spindle Shape Based on Three-dimensional Digitizer
Author(s):
ZHANG Lan-fen1; LI Bing-zhi2; ZHANG She-qi1; ZHANG Lin-sen2; WANG Fei1
1.College of Science，Northwest Agriculture and Forestry University，Yangling，Shaanxi 712100；2.College of Horticulture，Northwest Agriculture and Forestry University，Yangling，Shaanxi 712100
Keywords:
3-D digitizing; tall spindle shape; visual tree; light interception
PACS:
S 661.1
DOI:
-
Abstract:
Three-dimensional digitizer associated with software Piaf Digit and Vege STAR was used to reconstruct digitizing models of the 13-year-old apple trees trained to tall spindle shape，partition the model into cubes and analyzed the light interception of whole canopy and each types of shoots in canopy.The results showed that light interception (STAR) varied by the types of shoots.STAR values of short bourse shoots，short vegetative shoots，long bourse shoots and long vegetative shoots of large size trees were smaller than middle trees respectively，which were smaller than that of small trees.STAR values of short bourse shoots and short vegetative shoots of each trees were smaller than that of long bourse shoots and long vegetative shoots.The light interception of unshadowed shoots was larger than shadowed ones.Decreasing STAR of short bourse shoots and short vegetative shoots by shadowing of other types of shoots were larger than that of long bourse shoots and long vegetative shoots.STAR values of fruit trees increased by the height of ones and from inner to peripheral canopy，which fit the increasing trends of light transmittance measured by light quantum probes (LS190).The yield of fruit trees increased with STAR.Therefore，the light interception of canopy could be used to valuate the light distribution，guide the management of fruit trees，and improve the yield.

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Last Update: 2014-09-03