篱架葡萄园光能截获量研究

Study on light energy capture in grapery with espalier form

试验测定了篱架葡萄园在生长期截获光能的情况.结果表明,有89.5%的冬芽和绝大多数叶片分布在高0.5～2.0 m的架面上,在开花后(5月23日),绿色面积可占到架面的71.02%,行距3 m、株距1 m、架高2 m、南北行向的篱架架面在生长季节1 d中截获太阳直射光照时间为7.7 h,0.5～2.0 m的架面上1 d中截获太阳直射光照时间为9.3 h.果园行间投射率为56.5%,架面对光能的截获率为43.5%,架面的透射率接近10%,果园总透射率为64.6%,对光能的总截获率为35.4%.如果将行距缩小为2.5 m,对光的截获率可提高9%以上.

Light energy capture in grapery with espalier form in growing season was determined. The result indicated that there are about 89.5% of the winter buds and most of the leaves distributed in 0.5～2.0 m in the espalier. Green area occupied 71.02% of the espalier after flowering (May 24th). In south-north row cultivation mode, when row distance was 3 m, plant spacing was 1 m and the espalier height was 2 m, in the growing season, light capture time of espalier was 7.7 h per day, and it was 9.3 h per day on 0.5～2.0 m of the espalier. Rate of light transmission in rows was 56.5%, Rate of light capture by the espalier was 43.5%. Rate of light transmission by the espalier was nearly 10%. total rate of light transmission was 64.6% in grapery, and total rate of light capture was 35.4%. Rate of light capture will increase by 9% if the row distance was reduced to (2.5 m.)