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[目的]探究氟乐灵微囊粒剂对枣园杂草的防效及其对枣树生长的影响。[方法]选择6年生矮化密植枣园对氟乐灵微囊粒剂和对照药剂氟乐灵乳油随水灌溉进行除草试验,并采用GC-NPD测定各处理区不同土层氟乐灵残留量。[结果]35%氟乐灵微囊粒剂施药剂量为2100 g/hm~2处理枣园杂草,药后14 d对枣园总杂草株防效达82.7%,与对照药剂同期防效相当,药后30 d其对枣园总杂草株防效为80.9%,显著优于对照药剂,在土层5~10 cm处氟乐灵残留量为0.163 mg/kg,显著低于对照药剂。[结论]氟乐灵微囊粒剂对当地枣园杂草防效显著,明显延长了有效控草时间,在土壤中残留量较乳油低而减少了残留氟乐灵与枣树根系的接触频率。因此,35%氟乐灵微囊粒剂可随水灌溉进行枣园防除杂草。
[Objective] The research aimed to study the effects of trifluralin microcapsule granules on jujube weed control and its effect on jujube growth. [Method] The 6-year-old dwarfing and close-planting jujube garden was used to test the effect of trifluralin microcapsule granules and the control agent trifluralin on weeding experiments with water irrigation. GC-NPD was used to determine trifluralin residues in different soil layers . [Result] 35% Trifluralin microcapsule granules was applied at the dosage of 2100 g / hm ~ 2 for jujube orchard weed control. The control effect on the total weedy plants was 82.7% The effect was quite good. The control effect on the total weeds in Zaoyuan was 80.9% after 30 days of treatment, which was significantly better than that of the control. The residue of trifluralin at the depth of 5 ~ 10 cm was 0.163 mg / kg, which was significantly lower than that of the control Pharmacy. [Conclusion] Trifluralin microcapsule granules had significant control effect on the weed in the local jujube orchard, significantly prolonging the effective time of controlling grass, and the residual amount in the soil was lower than that of the EC, which reduced the contact frequency between the residual trifluralin and the jujube root . Therefore, 35% Trifluralin microcapsule granules can be used for watering jujube control weeds.