The chemical constituents of the fatty oil from seeds of Descurainia sophia(L.) Webb ex Prantl were analyzed by GC-MS.The results showed that thirty-four compounds were isolated and identified,representing 97.259% of ...The chemical constituents of the fatty oil from seeds of Descurainia sophia(L.) Webb ex Prantl were analyzed by GC-MS.The results showed that thirty-four compounds were isolated and identified,representing 97.259% of the total fatty oil.The main constituents of oil were unsaturated fatty acids(31.745%),unsaturated fatty acid esters(38.631%) and saturated fatty acid esters(12.285%).The main compounds with contents over 10%(V/V) followed as: 9,12,15-calendic acid-2,3-dihydroxypropyl ester(14.763%),(9Z,12Z,15Z)-calendic acid ethyl ester(14.723%) and(Z,Z)-9,12-octadecadienoic acid(13.073%).展开更多
通过田间试验,比较咪唑乙烟酸、苯达松、唑嘧磺草胺、草除灵4种除草剂及其混剂对苜蓿田播娘蒿的防效、对苜蓿的安全性及增产效果,为华北地区苜蓿田杂草的防治提供依据。结果表明,5%咪唑乙烟酸AS及其混配处理对播娘蒿表现出较好的生长抑...通过田间试验,比较咪唑乙烟酸、苯达松、唑嘧磺草胺、草除灵4种除草剂及其混剂对苜蓿田播娘蒿的防效、对苜蓿的安全性及增产效果,为华北地区苜蓿田杂草的防治提供依据。结果表明,5%咪唑乙烟酸AS及其混配处理对播娘蒿表现出较好的生长抑制作用,其中5%咪唑乙烟酸AS 1 800、2 250 m L/hm^2处理及5%咪唑乙烟酸AS 1 800 m L/hm^2分别与48%苯达松AS 1 500 m L/hm^2、30%草除灵EC 450 m L/hm^2、80%唑嘧磺草胺WG 56.25 g/hm^2混用处理对播娘蒿防效较好,鲜质量抑制率分别为76.05%、84.23%、77.65%、79.45%、85.81%;但5%咪唑乙烟酸AS 1 800 m L/hm^2与80%唑嘧磺草胺WG 56.25 g/hm^2、30%草除灵EC 450 m L/hm^2混用处理对苜蓿有明显的药害,苜蓿株高抑制率分别为33.33%、39.61%。30%草除灵EC 450 m L/hm^2和80%唑嘧磺草胺WG 56.25 g/hm^2对播娘蒿防效较差,鲜质量抑制率低于32.63%。5%咪唑乙烟酸AS安全性好、防效高,可进一步示范推广使用。展开更多
文摘The chemical constituents of the fatty oil from seeds of Descurainia sophia(L.) Webb ex Prantl were analyzed by GC-MS.The results showed that thirty-four compounds were isolated and identified,representing 97.259% of the total fatty oil.The main constituents of oil were unsaturated fatty acids(31.745%),unsaturated fatty acid esters(38.631%) and saturated fatty acid esters(12.285%).The main compounds with contents over 10%(V/V) followed as: 9,12,15-calendic acid-2,3-dihydroxypropyl ester(14.763%),(9Z,12Z,15Z)-calendic acid ethyl ester(14.723%) and(Z,Z)-9,12-octadecadienoic acid(13.073%).
文摘通过田间试验,比较咪唑乙烟酸、苯达松、唑嘧磺草胺、草除灵4种除草剂及其混剂对苜蓿田播娘蒿的防效、对苜蓿的安全性及增产效果,为华北地区苜蓿田杂草的防治提供依据。结果表明,5%咪唑乙烟酸AS及其混配处理对播娘蒿表现出较好的生长抑制作用,其中5%咪唑乙烟酸AS 1 800、2 250 m L/hm^2处理及5%咪唑乙烟酸AS 1 800 m L/hm^2分别与48%苯达松AS 1 500 m L/hm^2、30%草除灵EC 450 m L/hm^2、80%唑嘧磺草胺WG 56.25 g/hm^2混用处理对播娘蒿防效较好,鲜质量抑制率分别为76.05%、84.23%、77.65%、79.45%、85.81%;但5%咪唑乙烟酸AS 1 800 m L/hm^2与80%唑嘧磺草胺WG 56.25 g/hm^2、30%草除灵EC 450 m L/hm^2混用处理对苜蓿有明显的药害,苜蓿株高抑制率分别为33.33%、39.61%。30%草除灵EC 450 m L/hm^2和80%唑嘧磺草胺WG 56.25 g/hm^2对播娘蒿防效较差,鲜质量抑制率低于32.63%。5%咪唑乙烟酸AS安全性好、防效高,可进一步示范推广使用。
