PJB-2018-458
ALLELOPATHIC EFFECTS OF A WHEAT STRAW AQUEOUS EXTRACT ON FIVE PLANT SPECIES
XI ZHENG
Abstract
The objective of this study was to clarify the effects of a wheat straw aqueous extract on the germination and seedling growth of two maize varieties (ZhengDan958 and NongDa108) as well as three weed species [large crabgrass (Digitaria sanguinalis L.), barnyard grass (Echinochloa crus-galli L.), and redroot amaranth (Amaranthus retroflexus L.)]. The germination rates of large crabgrass, barnyard grass, and redroot amaranth decreased in response to wheat straw aqueous extract concentrations over 75, 50, and 37.5 g/L, respectively. Meanwhile, extract concentrations over 50 and 37.5 g/L decreased the germination rates of ZhengDan958 and NongDa108 seeds, respectively. Additionally, radicle and plumule lengths of large crabgrass, barnyard grass, and redroot amaranth weeds decreased after treatments with wheat straw aqueous extract concentrations over 37.5 g/L. In contrast, extract concentrations below 75 g/L increased radicle and plumule lengths of ZhengDan958 and NongDa108 maize seedlings. Furthermore, the chlorophyll content and peroxidase activity of ZhengDan958 seedlings were enhanced by the wheat straw aqueous extract. Although 50 g/L wheat straw aqueous extract adversely affected weed growth, it enhanced the growth of ZhengDan958 maize seedlings.
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