２，４-D丁酯对轮叶马先蒿的防除效果及对草地植被的影响

 为有效灭除草地害草轮叶马先蒿，采用２，４-D 丁酯在巴音布鲁克高寒草地进行了不同时期不同剂量化学防除试验。结果表明，防除轮叶马先蒿的最佳时期为盛花期；最佳药品用量是０．０６６ ｍＬ／ｍ^２；喷施２，４-D 丁酯后，草地植被生态环境得到明显改善，轮叶马先蒿被部分或完全灭除，优良牧草垂穗披碱草在草地群落中占据优势地位，同时杂类草新疆假龙胆受到一定的抑制，草地质量明显提高。

Studies of chemical control of Pedicularis verticilata with 2,4-D butyl ester and the effect on grassland vegetation

The herbicide 2,4-D butyl ester was used to control Pedicularis verticilata efficiently.The best time for control of P.verticilata was florescence and the concentration was 0.066 mL/m2.The grassland vegetation ecological environment was obviously improved after spraying 2,4-D butyl ester herbicide.P.verticilata was entirely or partially controlled and the high quality forage Elymus multicaulis became dominant.The harmful grassland weed Gentianella turkestanorum was inhibited to some degree.In summary,grassl...