Suppression effects of mulching by crushed bamboo or its compost on weed growth
2016
Yagi, T. (Ehime University (Japan). Faculty of Agriculture) | Toma, Y. | Morita, N. | Ishikake, K. | Adachi, M. | Yamashita, Y. | Ueno, H. | Nagasaki, N.
We investigated the effect of different materials for mulching on coverage rates, numbers, aboveground biomass of weeds, and soil chemical properties in upland field in Ehime, Japan. As two different materials, bamboo powder and composted bamboo powder were used and five treatments (C: control, B: bamboo powder, B1/3: 1/3 amount of bamboo powder, BC: composted bamboo powder, BC1/3: 1/3 amount of composted bamboo powder) were set up on May 18, 2015. In B, B1/3, BC, and BC1/3 plots, soil surface were covered by each materials (B and BC: 3.3 kg /square m, B1/3 and BC1/3: 1.1 kg /square m) and not covered in C (bare). Weed coverage rate was higher in C during the experiment and significantly lower in B at 42 days after covering. Plant number and amount of biomass were significantly lower in B than C. Amount of biomass of Gramineous weed, which was a dominated family, was lower in B (36.1% of C) and BC (35.9% of C) at 53 days after covering, while significant differences were not observed. Families of the weeds, Cyperaceae, Asteraceae, and Euphorbiaceae were significantly lower in B than C. There were no significant differences in soil pH, NH4sup(+), NO3sup(-), and available phosphate concentration among the treatments. This study represents that bamboo powder can be used for suppressing weed growth without changing soil chemical characteristics under the field conditions.
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