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麦田化除习惯于春季进行,春季化除,麦叶匐伏覆盖的面积大,草龄大,用药、用水量大,且3月上、中旬平均温度要比上年11月上中旬低5—6℃,如果再遇到春后雨雪天气多或麦苗已拔节,易错过防除适期,甚至导致无法用药,造成草荒,用药则易形成药害,防除效果也差。我场于1988—1993年连续6年在冬前(11月上旬至12月上旬)作了麦田冬前化除的示范推广工作,全场累计化除面积428000亩,据调查统计,株防效在90%以上的面积31030亩,占总面积的72.5%;株防效在80—90%的面积为8474亩,占总面积的19.8%;株防效在70—80%的面积1926亩,占总面积4.5%;株防效在70%以下的面积1370亩,仅占总面积的3.2%。
In addition to the use of wheat in the spring season, in addition to spring, wheat leaf covered by volvical area, grass age, medication, water consumption, and in March, the average temperature in mid-November last year than in mid-5- 6 ℃, if you encounter more spring rainy weather or wheat seedlings have been jointed, easy to miss the appropriate period of prevention and control, or even lead to medication, resulting in grass waste, medication is easy to form a phytotoxicity, control effect is poor. My field in 1988-1993 for 6 years in a row before the winter (early November to early December early) to make a demonstration of winter wheat before the removal of demonstration work, the audience total area of 428000 mu, according to the survey statistics, anti-plant effect The area of more than 90% is 31030 mu, accounting for 72.5% of the total area; the area of 80% -90% plant control efficiency is 8474 mu, accounting for 19.8% of the total area; the anti-strain effect is 1926 mu in area of 70-80% Accounting for 4.5% of the total area; strain control effect below 70% of the area of 1370 acres, accounting for only 3.2% of the total area.