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轮作,是向日葵耕作制度中最基本的也是最重要的一环。轮作可减轻病害、改善土壤水分、调剂土壤状况等。本文拟介绍有关国家在向日葵轮作中的一些做法以及我省在发展向日葵生产中应注意采取的一些措施。一、轮作与病害向日葵连作一般要减产20—30%。减产原因主要是病虫害和列当所致。锈病、霜霉病、黄萎病、凋萎病、斑病和菌核病是最主要的病害。列当是世界性检疫对象,寄生在向日葵根部,对向日葵产量和品质都有严重影响。
Crop rotation is the most basic and important part of the sunflower cultivation system. Crop rotation can reduce disease, improve soil moisture, adjust soil conditions. This article intends to introduce some of the countries in the rotation of sunflower practices and our province in the development of sunflower production should pay attention to some of the measures taken. First, the rotation and disease sunflower continuous crop production to reduce the general 20-30%. The main reason for the decrease is pests and diseases and caused by Lantian. Rust, downy mildew, Verticillium wilt, wilt, spot and sclerotinia are the most important diseases. Column is a worldwide quarantine object, parasitic on the roots of sunflower, sunflower yield and quality have a serious impact.