淮北地区不同降水年型下土壤湿度变化规律及与冬小麦产量关系研究

Study of the Relationship Between Soil Moisture Variational Rule and Winter Wheat Yield Under Different Yearly Precipitation Pattern In Huaibei Area

以宿州市为代表站,使用数理统计方法对淮北地区降水、土壤湿度和冬小麦产量资料进行分析。结果表明,近20 a来淮北地区降水丰枯交替出现,降水量年际间变化较大。降水对土壤湿度影响显著,土壤湿度年际变化较大。土壤湿度与冬小麦产量关系密切,在苗期、越冬期为负效应,在分蘖期、拔节期为正效应。

Take suzhou as representative station,analyze the data of precipitation、soil moisture and winter wheat yield by useing means of mathematical statistics method.The results showed that,in recent 20 years the wet year an dry year appeared alternately.The precipitation have a great vairations from year to year.The Precipitation had significant effect on soil moisture,The soil moisture have a great variation between years.There is close relationship between soil moisture and winter wheat yield,in wheat seedling atage and over-wintering stage,it shows negative effect,in tillering stage and jointing stage it shows positive effect.