[目的]研究不同缓解剂对2甲4氯钠玉米药害的缓解效果。[方法]玉米喷施2甲4氯钠后,于2个时期分别喷施10种缓解剂,之后调查玉米的5项指标。[结果]2甲4氯钠(1 200 g a.i./hm2)可致玉米株高、丙二醛含量、可溶性糖含量分别较对照增加6.35%、...[目的]研究不同缓解剂对2甲4氯钠玉米药害的缓解效果。[方法]玉米喷施2甲4氯钠后,于2个时期分别喷施10种缓解剂,之后调查玉米的5项指标。[结果]2甲4氯钠(1 200 g a.i./hm2)可致玉米株高、丙二醛含量、可溶性糖含量分别较对照增加6.35%、129.38%、48.60%,2甲4氯钠(2 400 g a.i./hm2)可使玉米叶绿素含量、产量分别比对照减少27.01%、37.95%。定量喷施芸苔素内酯、氨基酸、磷酸二氢钾、宝叶、奈安、生根活力素、赤霉酸或萘乙酸均有助于玉米产量不同程度地增加,其中药害前期喷施奈安效果最好,较2甲4氯钠对照其产量提高了50.42%。[结论]药害前期喷施奈安可有效缓解2甲4氯钠对玉米生长发育的影响,最终可使玉米产量的损失大大降低。展开更多
为降低麦田阔叶杂草对除草剂产生抗性的风险、降低除草成本、增加药效,采用室内生物测定法对2甲4氯钠与双氟磺草胺混配的除草活性及对小麦安全性进行研究。结果显示:在283.5 g a.i./hm^2处理下二者混配对播娘蒿、猪殃殃防效分别为97.57%...为降低麦田阔叶杂草对除草剂产生抗性的风险、降低除草成本、增加药效,采用室内生物测定法对2甲4氯钠与双氟磺草胺混配的除草活性及对小麦安全性进行研究。结果显示:在283.5 g a.i./hm^2处理下二者混配对播娘蒿、猪殃殃防效分别为97.57%、88.27%;二者混配在播娘蒿、猪殃殃2种杂草与小麦之间的选择性指数分别为6.07、2.34。室内生物活性测定结果表明,2甲4氯钠与双氟磺草胺混用后可以提高对麦田阔叶杂草的防除效果,同时对小麦安全性较高。展开更多
[ Objective] The paper was compare the control effects of different doses of MCPA-Na on weeds in foxtail millet field. [ Method ] Different doses of MC- PA-Na were sprayed on foxtail millet field, while artificial wee...[ Objective] The paper was compare the control effects of different doses of MCPA-Na on weeds in foxtail millet field. [ Method ] Different doses of MC- PA-Na were sprayed on foxtail millet field, while artificial weeding and spraying water was designed as control. The strain control effect and fresh weight control effect were calculated. [Result]The strain control effect and fresh weight control effect of 2 250 g/hm^2 MCPA-Na at 25 and 40 d post spraying were the best, and the fresh weight control effects reached 84.19% and 87.23%, respectively. Compared to CK, the yield increase effect of 1 500 g/hm^2 was the best, and the yield increase rate was 54.31% ; followed by 1 125 g/hm^2. Generally, 1 500 g/hm^2 was the best dosage of MCPA-Na in foxtail millet production. [ Conclusion]The paper provided a theoretical basis for screening the best dose of herbicide in foxtail millet production.展开更多
文摘[目的]研究不同缓解剂对2甲4氯钠玉米药害的缓解效果。[方法]玉米喷施2甲4氯钠后,于2个时期分别喷施10种缓解剂,之后调查玉米的5项指标。[结果]2甲4氯钠(1 200 g a.i./hm2)可致玉米株高、丙二醛含量、可溶性糖含量分别较对照增加6.35%、129.38%、48.60%,2甲4氯钠(2 400 g a.i./hm2)可使玉米叶绿素含量、产量分别比对照减少27.01%、37.95%。定量喷施芸苔素内酯、氨基酸、磷酸二氢钾、宝叶、奈安、生根活力素、赤霉酸或萘乙酸均有助于玉米产量不同程度地增加,其中药害前期喷施奈安效果最好,较2甲4氯钠对照其产量提高了50.42%。[结论]药害前期喷施奈安可有效缓解2甲4氯钠对玉米生长发育的影响,最终可使玉米产量的损失大大降低。
文摘为降低麦田阔叶杂草对除草剂产生抗性的风险、降低除草成本、增加药效,采用室内生物测定法对2甲4氯钠与双氟磺草胺混配的除草活性及对小麦安全性进行研究。结果显示:在283.5 g a.i./hm^2处理下二者混配对播娘蒿、猪殃殃防效分别为97.57%、88.27%;二者混配在播娘蒿、猪殃殃2种杂草与小麦之间的选择性指数分别为6.07、2.34。室内生物活性测定结果表明,2甲4氯钠与双氟磺草胺混用后可以提高对麦田阔叶杂草的防除效果,同时对小麦安全性较高。
基金Supported by Special Fund for Construction of China Agricultural Industry Research System(CARS-07-13.5)
文摘[ Objective] The paper was compare the control effects of different doses of MCPA-Na on weeds in foxtail millet field. [ Method ] Different doses of MC- PA-Na were sprayed on foxtail millet field, while artificial weeding and spraying water was designed as control. The strain control effect and fresh weight control effect were calculated. [Result]The strain control effect and fresh weight control effect of 2 250 g/hm^2 MCPA-Na at 25 and 40 d post spraying were the best, and the fresh weight control effects reached 84.19% and 87.23%, respectively. Compared to CK, the yield increase effect of 1 500 g/hm^2 was the best, and the yield increase rate was 54.31% ; followed by 1 125 g/hm^2. Generally, 1 500 g/hm^2 was the best dosage of MCPA-Na in foxtail millet production. [ Conclusion]The paper provided a theoretical basis for screening the best dose of herbicide in foxtail millet production.
