烟嘧磺隆与莠去津混用对玉米药害的影响.DOC

莠去津烟嘧磺隆 g a.i./hm2时，玉米糯203的株高和株重抑制率分别为32.4%和45.0%,并且心叶卷曲；当烟嘧磺隆以相同的剂量添加莠去津莠去津莠去津烟嘧磺隆烟嘧磺隆莠去津烟嘧磺隆19%烟?莠悬剂Effects of atrazine on nicosulfuron to corn injury and weed control LU Xiang-yang，XU Jun (Institute of Plant ＆ Enviromental Protection, Beijing Academy of Agricultural and Forestry Science, Beijing 100097,China) Abstract:sy injured when applied at recommended rate. The pot experiment showed that the height and aboveground weight of glutinous corn 203 were reduced by 32.4% and 45.0% respectively when nicosulfuron was applied at 90 g a.i./ha. Meanwhile, the central leaves were curly. Corn injured degree was inverse proportion to the ratio of atrazine/nicosulfuron within their applied ratio of 1:12～12:1. When their applied ratio was in less than 6:1, corn could not be prevented completely from injury. But thus could be done when their applied ratio was 12:1.Two field experiments over 2-ye period showed that the application of 19% nicosulfuron-atrazine OF, which was made from the ratio of atrazine/nicosulfuron 12:1, could prevent mid-susceptible cultivars from injury, while weeds in the corn field could be well controlled. Key words: corn; nicosulfuron; crop injury 烟嘧磺隆是对禾本科杂草有特效的茎叶处理型除草剂品种。由于其对玉米高度安全、除草效果突出、用量低等优点而广受欢迎[1]。但出人意料的是，随着烟嘧磺隆烟嘧磺隆烟嘧磺隆烟嘧磺隆烟嘧磺隆烟嘧磺隆烟嘧磺隆Siminszky等研究表明，用NA（1,8-萘二甲酸酐）进行种子处理可以减轻烟嘧磺隆Robinson等研究表明，用BAS145138处理玉米种子可以减轻烟嘧磺隆烟嘧磺隆莠去津 作者简介：卢向阳（1955-），男，副研究员，博士，主要从事除草剂应用技术研究。Tel：010E-mail：luxiangyang1955@。 1 材料与方法 1.1 供试作物 玉米，品种为糯203和京科25（北京市农林科学院玉米中心提供）；唐玉10唐山市农业科学研究所马唐[Digitaria sanguinalis (L.)Scop.]，[Eleusine indica (L.) Gaertn]；双子叶杂草：反枝苋（Amaranthus retroflexus L.），马齿苋（Portulaca oleracea L.），苘麻（Abutilon theophrasti Medic），铁苋菜（Acalypha australis L.）。 1.3 试验药剂 4%烟嘧磺隆悬剂（日本石原产业株式会社38%莠去津悬浮剂（山东侨昌化学有限公司19%烟?莠悬剂（烟嘧磺隆莠去津，河南省博爱惠丰生化农药有限公司PWT-510型精量喷雾塔（中国农业大学农业工程系制造）；MATABI背负式喷雾器（超绿16型，西班牙进口），一组4个喷头，喷幅2m，扇型喷头型号为HARDI 4110-10 cm，高15 cm，的瓦盆中，每盆装土1000 g，每盆播玉米糯203号6 粒，播种日期为2007年8月10日。播种后将瓦盆置于室外自然条件下培养，每天浇水保湿，施药前1 d间苗，每盆保留3株均匀一致的壮苗。施药日期为8月21日，玉米为4～5叶期。设莠去津添