湖南省主要类型水稻土镉污染改良利用研究

通过田间定位试验（３０．０ｍ＾２／处理）,重点探讨了轻、中度污染酸紫泥、黄泥田两种类型水稻土施用钙鲜磷肥、高温碱性硅渣、腐殖酸矿粉、石灰４种改良剂的合理施用技术、改良效应与机理,并通过田间微区（１．０ｍ＾２／小区）试验,研讨了改良配合施用的改良效果,提出了２组投入强度小、降镉效果显著且对产量无影响的配合施用的组合。     

Chemical control of Apriona germari （Hope） larvae with zinc phosphide sticks

Larvae of Apriona germari(Hope),found widely in China,cause serious damage to trees and are difficult to control.Since some biological control methods have not been applied effectively in the field,chemical control methods are used widely.Because of low cost,no poisonous residues and relatively safe application,zinc phosphide sticks have been tested to control the larvae as a matter of urgency.However,there were no criteria about the dosage and use.Given the characteristics of larvae tunnels on triploid Pop...