Spatial structure of soybean-wheat/barley-weed community in soybean cultivation using barley/wheat as living mulch

Yoshino Namiko, Kobayashi Hiroyuki, Uchida Tomoko, Shimazaki Yumi

doi:10.3719/weed.54.139

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ムギ類をリビングマルチとして用いたダイズ栽培におけるダイズ－ムギ類－雑草の群落空間構造
ムギルイオリビングマルチトシテモチイタダイズサイバイニオケルダイズムギルイザッソウノグンラククウカンコウゾウ

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Abstract

The spatial structure of the soybean-barley/wheat-weed community was examined to verify the weed suppression capability of winter wheat/barley as living mulch for soybean cultivation. Both barley and wheat grew vigorously and their dry weights were 2-8 times as much dry weight as soybean at both 30 days and 50 days after sowing. The total LAI of soybean plus living mulch was 10 and 6 times higher than that of conventional soybean cultivation at 30 days and 50 days after sowing, respectively. The relative solar radiation on the whole soil surface was less than 10% in living mulch systems, but not less than 10%, even immediately below the soybean plants, in conventional soybean systems at 50 days after sowing. The dry weights of weeds in living mulch systems were less than a half weeds weight of conventional system in 30 days after sowing. The soybean growth was not affected by the growth of living mulch nevertheless the change of row width from soybean to living mulch. Results of this study clarified that the barley/wheat as living mulch grew much more rapidly than soybeans, consequently effectively controlled the weeds by shading.

Journal

Journal of Weed Science and Technology

Journal of Weed Science and Technology 54 (3), 139-146, 2009

The Weed Science Society of Japan

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