| 除草剂与安全剂混用对杂草防效及糜子安全性的影响 |
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| 引用本文： | 林瑞嫦,王婉,高小丽.除草剂与安全剂混用对杂草防效及糜子安全性的影响[J].农药学学报,2022,24(2):352-360. |
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| 作者姓名： | 林瑞嫦 王婉 高小丽 |
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| 作者单位： | 1.西北农林科技大学 农学院/旱区作物逆境生物学国家重点实验室，陕西 杨凌 712100 |
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| 基金项目： | 国家谷子高粱产业技术体系项目 (CARS-06-13.5-A26)和陕西省重点研发计划项目 (2018TSCXL-NY-03-01) |
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| 摘 要： | 为探讨除草剂与安全剂混用对杂草的防治效果及对糜子安全性的影响,以'榆糜2号'为试验材料,在糜子三叶期选取两种茎叶型除草剂——阔世玛(3.6％ 二磺 ? 甲碘隆水分散粒剂)和锐超麦(20％ 双氟 ? 氟氯酯可湿性粉剂)与两种安全剂——芸苔素内酯(brassinolide,BR)和赤霉素(gibbrellic acid,G...
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| 关 键 词： | 糜子 阔世玛(3.6 二磺?甲碘隆水分散粒剂) 锐超麦(20 双氟?氟氯酯可湿性粉剂) 芸苔素内酯 赤霉素 杂草防效 药害缓解 |
| 收稿时间： | 2021-03-29 |
Effects of the application of herbicides mixed with safeners on weeds control efficacy and the safety to proso millet |
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| Institution: | 1.College of Agronomy, Northwest A&F University/State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling 712100, Shaanxi Province, China2.Kunming Seed Management Station, Kunming 650100, China |
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| Abstract: | To evaluate the effect of herbicides mixed with safeners on weeds control efficacy and the safety to proso millet (Panicum miliaceum L.) at high- and low- dosages of herbicides, Sigma broad (mesosulfuron-methyl + iodosulfuron-methyl-sodium 3.6% WG) and Quelex (halauxifen-methyl + florasulam 20% WP), were mixed with safeners, brassinolide (BR) or gibberellic acid (GA), and sprayed on the leaves and stems of ‘Yumi-2’ cultivar at three-leaf stage. Meanwhile, artificial weeding (control check 1, CK1) and tap water (control check 2, CK2) were included. The phytotoxicity index, control efficacy of weed, relative chlorophyll content, and active oxygen metabolism in leaves, shoot biomass, and seed yields were measured. The results showed that: BR eliminated the phytotoxicity of Sigma broad herbicide at low dosage, and 11.5% reduction of phytotoxicity index at high dosage; GA eliminated the phytotoxicity of low-dose Quelex herbicide and 40.9% reduction of phytotoxicity index of high-dose Quelex herbicide. However, the control effect of weed decreased 1.7%-18.0% in the treatments of herbicides and safener combinations. Application of herbicide plus safener increased the activity of superoxide dismutase (SOD) and chlorophyll content to some extent and decreased the content of malondialdehyde (MDA) significantly in proso millet leaves. Compared with the single application of herbicide, the SOD activity in the leaves of proso millet increased in the treatments of low- and high-dose Sigma broad herbicide mixed with BR at 7 d and 28 d after heading stage, and in the treatments of Quelex herbicide mixed with BR or GA at 7d after heading stage. Compared with the single application of herbicide, the shoot biomass of proso millet increased significantly in the treatments of Sigma broad herbicide mixed with BR or GA at 21-28 d after heading stage, and low-dose Quelex mixed with BR at 14 d after heading stage, and high-dose Quelex mixed with GA at 28 d after heading stage. The treatments with the mixture of herbicides and safener increased the seed yield of proso millet. The maximum yield was gained in the treatments of 600 g/hm2 Sigma broad herbicide mixed with 0.015 g/hm2 BR and 100 g/hm2 Quelex herbicide mixed with 14.7 g/hm2 GA, with 26.1% and 27.9% higher than the control of CK2, and 4.6% and 11.6% higher than the herbicide application only, respectively. The results could provide a scientific basis for the safety application of herbicides in broomcorn millet field and the use of plant growth regulators to alleviate herbicide phytotoxicity. |
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