共查询到20条相似文献，搜索用时 46 毫秒
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为了比较常规剂量和低剂量除草剂对稻田稗草、丛生千金子、碎米莎草、红根莎草和鳢肠的防除效果及其对产量的影响,在水稻和杂草的不同生长阶段以常规剂量和低剂量(口恶)草丙分别作单、连续和结合敌稗复合式处理。早期使用敌稗,随后在水稻3叶期使用低剂量(口恶)草丙0,08或0.11kgai/ha 处理,均获得优级杂草防除率和最高水稻产量。(口恶)草丙单一或连续使用能有效防除稗草和丛生千金子,但不能防除莎草和鳢肠。(口恶)草丙低剂量和常规剂量处理分别发生轻微和中度水稻植株损伤,但处理后19天,水稻恢复正常。 相似文献
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报道了触杀型除草剂敌稗结合长效型除草剂噁草丙、杀草丹或胺硝草复合式处理防除旱直播稻田杂草（稗草、丛生千金子、碎米莎草、圆叶牵牛、沼泽生异蕊花的效果。 相似文献
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10%氰氟·精噁唑EC防除水稻直播田千金子的效果研究 总被引：1，自引：0，他引：1
为给水稻直播田草害的化学防控提供依据,通过2年田间试验研究了10%氰氟.精噁唑EC（乳油）对水稻直播田千金子的控制效果和应用安全性。结果表明,氰氟.精噁唑对直播稻田6~7叶期的千金子具有良好的防除效果,有效成分用量75~90 g/hm2药后10 d的密度防效可达85%,药后20 d的密度防效可达90%以上、鲜重防效可达98%;相同用药量的密度防效显著优于对照药剂氰氟草酯。施用氰氟.精噁唑能显著提高水稻产量,增产效果达19.18%～27.41%。氰氟.精噁唑可作为水稻直播田防除大龄千金子的优良备选药剂。 相似文献
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双稃草在冀东滨海盐碱地稻区自2000年始上升为主要草害,其特征特性与千金子相似,对常用药剂敌稗、二氯喹啉酸和五氟磺草胺抗药性很强,封闭法防除可选用禾草丹、丁草胺、苯噻酰草胺或恶草酮等药剂,茎叶处理法防除可选用氰氟草酯或恶唑酰草胺。 相似文献
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20%二氯喹啉草酮SC防除水稻田稗草和千金子试验 总被引：1，自引：0，他引：1
《大麦与谷类科学》2015,(3)
<正>由于机插秧水稻面积的推广,稗草、千金子危害日益加重,已成为方强农场水稻田主要草害。为了验证20%二氯喹啉草酮SC对稗草和千金子的防除效果,我们进行了本试验。1材料与方法1.1试验材料及处理本试验供试药剂为20%二氯喹啉草酮SC(江苏省农科院植保所提供)、20%氰氟草酯EC(丰山集团提供)及50%二氯喹啉酸WP(绿利来股份有限公司提供)。设4个处理,处理A:20%二氯 相似文献
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试验结果表明,40％双草醚·氰氟草酯WP对机插秧田稗草、千金子、球花碱草、丁香蓼、矮茨菇等混生杂草具有良好的防除效果,杀草谱广,对水稻安全。推荐用药量247．5—270s／hm2（ai．99—108g）为宜,在水稻栽插后20d左右用药一次即可控制杂草为害。 相似文献
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《Plant Production Science》2013,16(4):255-261
AbstractTo elucidate the effect of drainage of paddy fields on root lodging tolerance in direct-sown rice, we measured the pushing resistance (R), diameter of hill at the base (Dm), shoot dry weight (Ws) and root dry weight (Wr), in rice varieties grown using several irrigation management schemes that differed in the frequency and length of field drainage during the growing season. Soil hardness was also monitored to investigate the relationship between the variance of soil physical properties caused by different irrigation treatments and root lodging tolerance. Pushing resistance moment (Rh), i.e., product of pushing resistance (R) and height of pushed part of hill (h), showed higher values in rice grown in fields drained more frequently or for longer periods. A similar pattern was found in rice grown in field plots where root penetration to the subsoil layers was prevented by laying an unwoven cloth between the topsoil and subsoil layers. Higher values for pushing resistance efficiency based on root dry weight (Kr : Rh/Wr/Dm) were also found in plots subjected to more frequent or prolonged drainage, irrespective of rice variety. Soil hardness was progressively increased by each field drainage during the growing season, and showed a highly significant relationship with Kr. The above results suggest that field drainage increases the root lodging tolerance in direct-sown rice through improvement of anchoring ability caused by increased soil hardness. 相似文献
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针对梅里斯达斡尔族区水稻发展存在的问题,提出在整顿巩固和提高的基础上,根据水源和水利灌溉工程、土地劳力、技术力量、资金、物资和耕作栽培水平,因地制宜有计划、有步骤地扩大面积,遵循发展与巩固提高并重,提高单产与扩大面积相结合的指导思想,并提出生产上的具体措施。 相似文献
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L. G. Schoenleber 《American Journal of Potato Research》1970,47(2):63-67
Three sizes of insect traps not dependent on electricity from power lines are described. Yellow painted baffles are used to attract green peach aphids. A timing mechanism, carriage with containers, and a concentration funnel permit collection of insects for predetermined time periods. A physical count of insects caught in each container gives the time period and magnitude of flight. 相似文献
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对"瑞津"长效肥料在水稻应用的效果进行试验研究,结果表明:"瑞津"肥料使用后,能促进秧苗根系生长,使根量大、根系长,有助于增强秧苗的抗逆性,有利于分蘖的早生快发,随着孕穗后期养分供应量的增加,水稻生育期延后;实粒数及千粒重均有增加,增产幅度为6.53%。 相似文献
