免耕覆盖麦秸土壤中酚酸浓度的变化及酚酸对夏玉米早期生长的影响  

Change of Phenolic Acids Concentration in Soil under Wheat Straw Mulch and the Effect of Phenolic Acids on Early Growth Stage of Summer Maize

作　　者：贾春虹[1] 王璞[2] 赵秀琴[2] 

机构地区：[1]北京市农林科学院植物保护环境保护研究所,北京100089 [2]中国农业大学农学与生物技术学院,北京100094

出　　处：《华北农学报》2004年第4期84-87,共4页Acta Agriculturae Boreali-Sinica

基　　金：北京市自然基金资助项目(6992012)

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(2.62～4.94)×10-5,(5.72～7.54)×10-5,(3.05～5.38)×10-5和(3.93～5.20)×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。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-hydroxybenzoic acid (p-HBA). Their average amounts are (1.31-2.47)×10^(-7),(2.86-3.77)×10^(-7),(1.53-2.69)×10^(-7)and (1.97-2.60)×10^(-7)mol/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 concentrations required to reduce growth by 10% of maize radicle of FA, VA and p-HBA, namely ED_(10), are 1.14,3.57,6.30 mmol/L, respectively.

关 键 词：土壤 免耕覆盖 夏玉米 早期生长 胚根 胚芽 麦秸 酸浓度 酚酸 香草酸 

分 类 号：S513[农业科学—作物学] S511