近年来时常有群众反映麦田整块或局部出现小麦空壳败育现象,给老百姓带来巨大损失。基于这种情况,通过田间试验探索了应用"10%苯磺隆15 g/亩;56%二甲四氯钠盐30 g/亩;10%苯磺隆15g/亩+56%二甲四氯钠盐30 g/亩;3%双氟唑草酮50 m L/...近年来时常有群众反映麦田整块或局部出现小麦空壳败育现象,给老百姓带来巨大损失。基于这种情况,通过田间试验探索了应用"10%苯磺隆15 g/亩;56%二甲四氯钠盐30 g/亩;10%苯磺隆15g/亩+56%二甲四氯钠盐30 g/亩;3%双氟唑草酮50 m L/亩;乙烯利+胺酰脂200 m L/亩"5组不同小麦除草剂和生长调节剂,在小麦起身至扬花期间以不同浓度喷洒对小麦结实空壳败育穗的影响。结果显示,在小麦孕穗末期、扬花期加倍量喷洒除草剂苯磺隆和苯磺隆与其他麦田除草剂复配制剂,会对小麦结实产生影响。展开更多
Many sulfonylurea herbicides have been used under a wide variety of agronomic conditions in numerous crops. An understanding of dissipation rate of herbicide is fundamental for predicting the fate of herbicide in soil...Many sulfonylurea herbicides have been used under a wide variety of agronomic conditions in numerous crops. An understanding of dissipation rate of herbicide is fundamental for predicting the fate of herbicide in soil. In order to study the sulfosulfuron persistence under different cultivation systems of wheat, a four replicated experiment was carried out in the Hashemabad Reaserch Center of Gorgan, Iran in 2010 in a split plot design with two factors. Cultivation system as the main factor consisted of six levels, including conservation tillage by Combinate, no-tillage by Baldan grain drill, conservation tillage by Chizelpacker, conservation tillage by Delta Model, surface tillage by heavy disk, and conventional tillage by moldboard plow and twice disk. Secondary factor included two levels of sulfosulfuron application(with and without sulfosulfuron). Soil samples were taken at 6 stages and soil microbial respiration and soil pH were measured as factors affecting sulfosulfuron persistence. Results showed the least time of sulfosulfuron persistence belonged to the cultivation system of no-tillage by Baldan grain drill with a half-life of 4.62 d. Then, conservation tillage by Combinate and conventional tillage with a half-life of 6.30 d and conservation tillage by Delta Model with a half-life of 9.90 d were ordered. The most time of sulfosulfuron persistence(11.55 d) was related to conservation tillage by Chizelpacker. Ninety percent reduction of sulfosulfuron concentration occurred 15.34, 20.92, 32.88, and 36.38 d after sulfosulfuron application, respectively, for no-tillage system, conservation tillage by Combinate and conventional tillage, conservation tillage by Delta Model and surface tillage, and conservation tillage by Chizelpacker. In all the cultivation systems, toxicity symptoms were not observed 40 d after spraying sulfosulfuron onto the tomato plants which were used as test plant. Effects of different cultivation systems on soil microbial respiration were also significant.展开更多
文摘近年来时常有群众反映麦田整块或局部出现小麦空壳败育现象,给老百姓带来巨大损失。基于这种情况,通过田间试验探索了应用"10%苯磺隆15 g/亩;56%二甲四氯钠盐30 g/亩;10%苯磺隆15g/亩+56%二甲四氯钠盐30 g/亩;3%双氟唑草酮50 m L/亩;乙烯利+胺酰脂200 m L/亩"5组不同小麦除草剂和生长调节剂,在小麦起身至扬花期间以不同浓度喷洒对小麦结实空壳败育穗的影响。结果显示,在小麦孕穗末期、扬花期加倍量喷洒除草剂苯磺隆和苯磺隆与其他麦田除草剂复配制剂,会对小麦结实产生影响。
基金supported by the research and technology vice presidency,Gorgan University of Agricultural Sciences and Natural Resources,Iran
文摘Many sulfonylurea herbicides have been used under a wide variety of agronomic conditions in numerous crops. An understanding of dissipation rate of herbicide is fundamental for predicting the fate of herbicide in soil. In order to study the sulfosulfuron persistence under different cultivation systems of wheat, a four replicated experiment was carried out in the Hashemabad Reaserch Center of Gorgan, Iran in 2010 in a split plot design with two factors. Cultivation system as the main factor consisted of six levels, including conservation tillage by Combinate, no-tillage by Baldan grain drill, conservation tillage by Chizelpacker, conservation tillage by Delta Model, surface tillage by heavy disk, and conventional tillage by moldboard plow and twice disk. Secondary factor included two levels of sulfosulfuron application(with and without sulfosulfuron). Soil samples were taken at 6 stages and soil microbial respiration and soil pH were measured as factors affecting sulfosulfuron persistence. Results showed the least time of sulfosulfuron persistence belonged to the cultivation system of no-tillage by Baldan grain drill with a half-life of 4.62 d. Then, conservation tillage by Combinate and conventional tillage with a half-life of 6.30 d and conservation tillage by Delta Model with a half-life of 9.90 d were ordered. The most time of sulfosulfuron persistence(11.55 d) was related to conservation tillage by Chizelpacker. Ninety percent reduction of sulfosulfuron concentration occurred 15.34, 20.92, 32.88, and 36.38 d after sulfosulfuron application, respectively, for no-tillage system, conservation tillage by Combinate and conventional tillage, conservation tillage by Delta Model and surface tillage, and conservation tillage by Chizelpacker. In all the cultivation systems, toxicity symptoms were not observed 40 d after spraying sulfosulfuron onto the tomato plants which were used as test plant. Effects of different cultivation systems on soil microbial respiration were also significant.
