青稞白酒糟醅粗提物抑草活性研究
Study on Inhibitory Activity of Crude Extracts from Distiller’s Grains of Hulless Barley against Weeds

为研究青稞白酒糟醅粗提物的抑草活性。采用超冷浸提法制备青稞白酒糟醅粗提物，种子萌发和室内盆栽的方法测定粗提物的抑草活性，硫代巴比妥酸(TBA)、丙酮浸提等方法测定优势杂草的生理指标。结果表明，当青稞白酒糟醅粗提物质量浓度为100 mg/mL时，对单子叶和双子叶杂草幼苗生长的抑制率分别为100%和80%。安全性评价显示，青稞白酒糟醅粗提物对油菜、蚕豆、豌豆风险高，对春小麦安全。当粗提物质量浓度为200 mg/mL时，对麦田优势杂草野燕麦具有明显的抑制作用，且使野燕麦叶片的各项生理生化指标产生不同程度的变化。
To study the inhibitory activity of crude extracts from hulless barley distiller’s grains against weeds,The crude extracts from hulless barley distiller’s grains were obtained by ultrasonic extraction in cold methanol. the inhibitory activity of crude extract against weeds were tested by method of seed germination and pot experiment; the biological and biochemical indexes of dominant weeds were measured by thiobarbituric acid method and acetone extraction method,respectively.The results showed when the mass concentration was 100 mg/mL that inhibition rates of the crude extracts against seeds growth in four monocotyledon and dicotyledon weeds were 100% and 80%,respectively. The safety evaluation of crops showed that crude extracts had a high risk to rape(Brassica napus L.),broad bean(Vicia faba L.),and pea(Pisum sativum L.),but safe to spring wheat(Triticum aestivum L.).When the concentration of crude extracts reached 200 mg/mL,inhibitory effect on dominant weed.Avena fatua L. in wheat field was significant,and this caused change of biological and biochemical indexes of Avena fatua L. at defferent degree.