大豆苗后除草药害怎么办

你好 对啊 用啥能缓解呢 谢谢
2025-03-24 09:04:47
推荐回答(2个)
回答1:

(1)及时查田补种,对药害严重造成死苗形成缺苗断垄的地块应及时补种,把药害损失降低到最低程度。
(2)增施肥料,当植株出现黄化、药害等症状时,可每亩增施尿素3.3千克,增加养分,加强培育以增强大豆生长活力,促进早发。
(3)喷施植物生长调节剂,每亩喷施云大-120药剂2克+增产菌浓缩液13毫升,或生根粉等药剂。
(4)采取促早熟增产措施,通过喷施叶面肥、加强田间中后期管理等措施来促使受害植株及早恢复生长,正常成熟。每亩可喷施磷酸二氢钾170克+思福叶面肥100克+尿素500克。此外还可用适当的微肥,如每亩用钼酸铵150克、硼砂100克、硫酸锌200克作叶面肥。
(5)针对导致发生药害的药剂,可喷施赤霉素或撒草木灰、活性炭等缓解;光合作用抑制剂和某些触杀型除草剂的药害,可施用速效肥,促进大豆恢复生长;土壤处理剂的药害可通过翻耕等处理,尽量减少残留。

回答2:

大豆苗后茎叶除草剂药害处理方法

一、症状:大豆苗后茎叶处理除草剂药害分显性和隐性,显性药害大豆叶片卷曲并产生触杀型斑点,一般几天内可恢复正常,不影响大豆生长及产量;隐性药害叶片受害症状不明显,但大豆生长受抑制,生长缓慢,减产较重。
二、对策:大豆苗后茎叶处理除草剂应选用氟磺氨草醚、异恶草松、苯达松、烯禾啶、精喹禾灵、精稳杀得、烯草酮等安全性高的除草剂,不良环境下尽量避免使用咪草烟,如果大豆苗后应用咪草烟时期及剂量掌握不当,遇低温会产生严重的隐性药害,减产幅度大。
补救措施:
  除草剂药害一般没有什么快速有效的补救方法,只有采取加强大豆营养,预防病菌感染的措施来提高大豆抗性和防止病菌感染,促进药害大豆恢复。对于药害较重,豆苗已死的田块,应及时改种其他抗药性强的作物。1、及时喷施植物生长调节剂和抗菌剂。调节剂能增加作物营养,提高大豆生理活性,促进大豆根、茎、叶再生。而抗菌剂能防止因大豆药害、抗性下降而引起的病菌感染。所以两者合用能很好地促进受害大豆恢复。建议亩用植物生长调节剂奥普尔50-100ml和抗菌剂50%可湿性粉剂多菌灵75g分别对水30公斤单喷。
  2、增施化肥。受害田块可增施化肥,促进大豆生长加快药害恢复。一般亩用尿素10斤或复合肥15斤,乘雨撒施。

  3、移栽,套种。对于因局部药害较重豆苗已死亡田块,可适时移栽或套种其他作物。移栽应在大豆二片复叶前,每天下午4时后带土移栽,栽后浇水。移栽后豆苗仍不能成活可套种一些抗药性强的禾本科作物,如玉米、高粱等
我就知道这些了,供你参考
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