土壤水分、淹水深度与盖土厚度对抗药性耳叶水苋种子出苗的影响

Effect of Soil Moisture,Submersion Depth and Soil Thickness on Seed Germination of Herbicide Resistant Ammannia arenaria

在智能温室内采用盆栽试验方法，研究土壤含水量、淹水深度及盖土厚度对抗苄嘧磺隆和敏感耳叶水苋（ Ammannia arenaria）生物型种子出苗的影响。结果表明，2种耳叶水苋生物型种子在土壤含水量15％以下不能出苗，在含水量25％～40％条件下出苗率较高，可达77．9％～91．1％。耳叶水苋的种子对淹水环境具有较强的适应能力，在0．2～6．4 cm水层下均可以正常萌发，但水下的耳叶水苋幼苗不能长高，萌发后60 d也不会腐烂死亡。

Pot experiments were conducted at an automatic greenhouse to determine the effects of soil moisture ,submersion depth and soil depth on seed germination of bensulfuron -methyl resistant and susceptible Ammannia arenaria.Neither biotype germinated when the soil moisture content was under 15%but the germination rate could reach 77.9%~91.1%when soil moisture was between 25%~40%.A.arenaria seeds had strong adaptability to submersion being able to ger-minate when submersed at depths between 0.2~6.4 cm.However,young seedlings growing under water failed to grow higher although they did not rot or die even 60 days after germination .