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松香助剂对烟嘧磺隆防除夏玉米田杂草的减量增效作用 总被引:2,自引:0,他引:2
[目的]研究松香助剂对烟嘧磺隆防除夏玉米田常见杂草的减量增效作用。[方法]通过温室盆栽法结合田间试验,定期调查的方法评价了其对烟嘧磺隆防除马唐、狗尾草、反枝苋、马齿苋效果的影响。[结果]40 g/L烟嘧磺隆油悬浮剂使用量分别为60、30 g a.i./hm~2(30 g a.i./hm~2+松香助剂)时,施药后14 d,对杂草的株防效分别达85.38%、60.76%、75.43%;施药后28 d,对杂草的株防效和鲜重防效分别为83.42%、47.59%、68.45%和80.00%、54.16%、78.83%,30 g a.i./hm~2+松香助剂处理14 d株防效和28 d鲜重防效均优于30 g a.i./hm~2处理的防效。[结论]松香助剂对烟嘧磺隆防除夏玉米田杂草具有减量增效作用且对玉米安全。 相似文献
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《世界农药》2021,(1)
为了开发出对非耕地恶性杂草防效好的除草剂,针对非耕地恶性杂草牛筋草和小飞蓬的防治,采用室内生物测定方法测定了草甘膦、草铵膦混剂与三氟羧草醚不同配比组合对非耕地杂草牛筋草和小飞蓬的联合毒力作用,并评价了最佳配比组合物的田间防效。试验结果表明,草甘膦铵盐,草铵膦和三氟羧草醚钠盐混配对非耕地杂草的防除效果因混配比例不同而表现出不同的联合作用方式,其中以三者的配比为55∶10∶1时对牛筋草和小飞蓬防除效果的增效作用最为明显,其共毒系数分别为218.5和452.4。田间药效试验结果显示,71%草甘膦铵盐·草铵膦·三氟羧草醚钠盐可溶粉剂在有效成分用量1 065~2 130 g/hm~2对非耕地杂草的防效较好,防效可达到90%以上。草甘膦铵盐、草铵膦和三氟羧草醚钠盐混配可被进一步开发用于非耕地杂草防除。 相似文献
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草铵膦、百草枯、草甘膦对非耕地杂草的防效比较 总被引:3,自引:0,他引:3
[目的]探索50%草铵膦AS替代百草枯和草甘膦防除非耕地杂草的可行性。[方法]通过田间茎叶喷雾处理试验,比较草铵膦、百草枯和草甘膦对非耕地主要杂草的除草效果。[结果]50%草铵膦AS 900 g a.i./hm2、900 g a.i./h m2(加喷雾助剂)处理药后15 d对各类杂草的株防效分别为92.20%、100%,与41%草甘膦A S1 722 g a.i./hm2、25%百草枯SG 900 g a.i./hm2处理药后15 d的株防效(88.80%~92.35%、95.78%~96.15%)差异不显著;药后30 d的株防效(94.56%~100%)与草甘膦的株防效(94.7%~100%)差异不显著,但显著高于百草枯的株防效(82.58%~84.59%),药后30 d的鲜质量防效(95.13%~100%)与草甘膦(92.33%~100%)、百草枯(90.26%~94.94%)差异不显著。[结论]草铵膦可以替代百草枯和草甘膦,防除非耕地杂草,添加喷雾助剂效果更好。 相似文献
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验证30%草甘膦可溶液剂在耐草甘膦转基因玉米田防除杂草的效果。采用喷雾处理方法和目测法评价30%草甘膦可溶液剂不同施药量对耐草甘膦转基因玉米田禾本科和阔叶杂草的田间防控效果及对玉米的安全性。结果表明,30%草甘膦可溶液剂900~1 350 g/hm2处理对玉米田中苘麻、藜、马唐等一年生杂草的防效均很好,在药后30 d的株防效和鲜重防效分别为92.1%~96.6%和93.6%~97.4%,对玉米有很好的增产作用,鲜重增产率达到42.1%~45.3%。防除耐草甘膦转基因玉米田杂草,以30%草甘膦可溶液剂900~1 350 g/hm2的施药量进行均匀喷雾,可有效控制田间杂草,且对玉米安全。 相似文献
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《精细化工中间体》2001,31(1)
Hampshire化学公司在 1999年布赖顿会议贸易服务展览会上介绍了一种草甘膦加工用新助剂 ,而这种助剂已长期在香波和牙膏中得到广泛应用 ,是一种既安全、有效 ,又对环境友好的新助剂。加入 4%甘氨酸酯异丙胺盐的草甘膦剂型对绝大多数靶标品系具有较好的防除效果。田间施用 0 2 5 1ba.i/ha 13d后 ,对帕麦尔苋的防效达 98 7% ,对黑雀麦的防效达 91% ,对宝盖草的防效达89 3% ,对茴麻的防效达 93 3%。田间试验表明 ,以甘氨酸酯为助剂的草甘膦对转基因作物不会造成多大损害。新的助剂可望在短时间内获得美国EPA的批准并推广。… 相似文献
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[目的]为明确麦草畏、草甘膦钾盐联合作用效果和30%麦草畏·草甘膦钾盐AS对非耕地一年生杂草的防除效果。[方法]采用茎叶喷雾法测定了2种除草剂室内联合作用试验,并对筛选出的最佳配比加工成30%麦草畏·草甘膦钾盐AS进行了田间药效试验。[结果]麦草畏、草甘膦钾盐以1∶9复配对非耕地一年生杂草的联合作用较好,30%麦草畏·草甘膦钾盐AS的推荐使用剂量为1350~1800g a.i./hm2,药后30 d对非耕地一年生杂草的总体防效可达到95.1%~97.6%。[结论]麦草畏、草甘膦钾盐复配互补性强,对反枝苋、马齿苋、狗尾草、马唐等一年生杂草增效作用明显,30%麦草畏·草甘膦钾盐AS能够有效防除非耕地一年生杂草。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献