大豆田化学除草技术研究

Studies on Techniques of Weed Chemical Control in Soybean Fields

本文采用随机区组设计方法，于１９９５—９７年使用日本住友公司最新研制的除草剂——５０％速收、１０％利收、１２％收乐通等对大豆田化学除草技术进行了研究。结果表明，大豆田化学除草应以苗前土壤处理为主，苗后茎叶处理为辅。苗前土壤处理春大豆田使用速收１５０ｇ／ｈａ左右、夏大豆田７５—１５０ｇ／ｈａ对阔叶杂草防效显著；与禾耐斯混用对阔叶杂草和禾本科杂草可获得显著而稳定广谱的除草效果；对大豆及后作高度安全。苗后茎叶处理春大豆田利收单用４５０—６００ｍｌ／ｈａ对阔叶杂草防效显著；利收３００—４５０ｍｌ／ｈａ与拿捕净５００—１０００ｍｌ、高效盖草能１５０—３００ｍｌ或收乐通３００—４５０ｍｌ／ｈａ混用可获加成效应，提高药效，扩大杀草谱；对后作安全。

From 1995 to 1997, with random block design, the techniques of weed chemical control in soybean fields were studied by using the herbicides, which included 50% Sumisoya, 10% Resource, 12% Selectone and others. The results showed that:①With applications preemergence, broadleaf weeds control effects were significant by using Sumisoya 150g/ha in spring-sown soybean fields and 75-150g/ha in summer-sown soybean fields.Weeds control effects for broadleaf weeds and grass weeds were very significant ,steady and wide by using the mixtures of Sumisoya and Harness. All treatments were safe to soybean plants and following crops.②With applications postemergence, broadleaf weeds control effects were significant by using Resource (450-600ml/ha) in spring-sown soybean fields. If 300-450ml/ha Resource was mixed with 500-1000ml/ha Sethoxydim,150-300ml/ha efficient Haloxyfopmethy, or 300-450ml/ha Selectone respectively in spring-sown soybean fields, weeds control effects were more obvious and the weed control spectra were wider.