College of Horticulture and Plant Protection, Inner Mongolia Agricultural University, Hohhot, 100010, China.
Ulangab Institute of Agricultural and Forestry Sciences, Ulanqab, 012000, China.
Chem Biodivers. 2023 Jul;20(7):e202300444. doi: 10.1002/cbdv.202300444. Epub 2023 Jul 4.
Cruciferous plants are frequently used for ecologically benign weed control in agricultural production. Most effective Broccoli varieties were screened using the entropy method-based topsis model at first. Result showed that varieties of Lvwawa and Lvbaoshiwere most effective in allelopathic suppression on radishes. Column and thin-layer chromatography were used to extract the allelopathic compounds from broccoli residues, which contained various herbicidal active substances; among them, purified single-molecule indole-3-acetonitrile has a stronger inhibitory effect than pendimethalin (commercial herbicide). The weed inhibition rate increased with increasing broccoli residue dosage, with a 40 g/m broccoli residue dose yielding the highest suppression rate. Its effect was similar to that of indole-3-acetic acid. Too much of this substance leads to the plant's death. Moreover, broccoli residues had effective control effect on weeds in natural soils in greenhouse and field trials. The results demonstrated that broccoli residue could be used for weed management in field for abundant allopathic suppression molecules to weeds, and that Indole-3-acetonitrile is one of the most important allopathic molecule.
十字花科植物常用于农业生产中的生态良性杂草控制。首先，利用基于熵值法的逼近理想解排序法（TOPSIS）模型筛选出最有效的西兰花品种。结果表明，在化感抑制萝卜方面，绿哇和绿宝石品种最为有效。采用柱层析和薄层层析从西兰花残渣中提取化感化合物，其中含有多种除草活性物质；其中，纯化的单一分子吲哚-3-乙腈对二甲戊灵（商业除草剂）的抑制作用更强。杂草抑制率随西兰花残渣用量的增加而增加，40g/m 的西兰花残渣剂量具有最高的抑制率。其效果与吲哚-3-乙酸相似。这种物质过多会导致植物死亡。此外，在温室和田间试验中，西兰花残渣对自然土壤中的杂草具有有效控制作用。结果表明，西兰花残渣可用于田间杂草管理，因为其含有丰富的化感抑制分子，而吲哚-3-乙腈是最重要的化感分子之一。
