摘要： 室内和田间试验表明:麦秸的水浸提物对玉米的胚芽和胚根的生长有显著影响作用。小麦-玉米轮作区免耕覆盖的土壤中可以检测到4种酚酸:阿魏酸、香草酸、肉桂酸和对羟基苯甲酸,它们在土壤中的平均含量分别为(2.624.94)×10-5,(5.727.54)×10-5,(3.055.38)×10-5和(3.935.20)×10-5mol/L。它们在土壤中下降的速度很慢。室内检测阿魏酸、香草酸和对羟基苯甲酸抑制玉米的胚芽和胚根的生长,其抑制根伸长10%的浓度(ED10)分别是1.14,3.57和6.30mmol/L。

关键词: 生化互作, 玉米, 麦秸, 化感物质, 酚酸

Abstract: Trials were conducted in laboratory and field in Beijing region indicated allelopathy of wheat straw on maize. Four phenolic acids as allelochemicals have been identified and quantified in no-tillage with wheat straw mulch. They are ferulic acid ( FA), vanillic acid ( VA), cinnamonic acid ( CA) and p-hydroxyben- zoic acid ( p-HBA). Their average amounts are ( 1. 31-2. 47) × 10^-7, ( 2. 86-3. 77) × 10^-7, ( 1. 53-2. 69) × 10^-7and ( 1. 97-2. 60) × 10^-7mol/ L, respectively, and they reduced slowly in soil. FA, VA and p-HBA were tested in laborotary bioassay for their allelopathic effects on germination and seedling growth of maize. The con- centrations required to reduce growth by 10% of maize radicle of FA, VA and p-HBA, namely ED10, are 1. 14, 3. 57, 6. 30 mmol/ L, respectively.

Key words: Allelopathy, Maize, Wheat straw mulch, Allelochemicals, Phenolic acid

中图分类号: 

• S513.01