摘要
为了研究科尔沁沙地最典型地区气象条件对春小麦千粒重的影响规律及特征。以奈曼旗国家气象站近28年春小麦观测数据及地面气象观测数据为研究对象,进行相关分析和回归分析。结果表明:春小麦生长后期日照时数与千粒重负相关,抽穗-成熟期相关系数为-0.485,乳熟-成熟期相关系数为-0.444;开花-乳熟期气温日较差与千粒重呈显著性正相关,相关系数为0.392;孕穗-抽穗期需要较低的空气相对湿度,相关系数为-0.540,开花期春小麦根部需要较高的土壤相对湿度,相关系数为0.527。建立了春小麦千粒重预报回归模型,经检验拟合度较高,可为今后春小麦种植管理及产量预报提供依据。
The aim of this study is to find out the influence of meteorological conditions on 1000-grain weight of spring wheat,especially the influence laws and characteristics,in the most typical area of Horqin sandy land.The spring wheat observation data and surface meteorological observation data of Naiman National Meteorological Observing Station in recent 28 years were adopted to carry out the correlation analysis and regression analysis.The results showed that there was a negative correlation between the sunshine hours in the late growth stage of spring wheat and 1000-grain weight.The correlation coefficient of heading-mature stage was-0.485,and the correlation coefficient of milk maturity-mature stage was-0.444.There was a positive correlation between the diurnal temperature difference of flowering-milk maturity and 1000-grain weight,and the correlation coefficient was 0.392.Lower air relative humidity is required at booting-heading stage,with a correlation coefficient of-0.540.Spring wheat roots at flowering stage need higher soil relative humidity,with a correlation coefficient of 0.527.The predictive regression model for 1000-grain weight of spring wheat was established,which has a high degree of fitting,and can provide a basis for spring wheat planting management and yield forecast in the future.
作者
董佳蕊
DONG Jiarui(Naiman County Meteorological Bureau,Tongliao,Inner Mongolia 028300)
出处
《中国农学通报》
2023年第12期81-85,共5页
Chinese Agricultural Science Bulletin
关键词
春小麦
千粒重
气象因子
日照
温度
湿度
相关分析
spring wheat
1000-grain weight
meteorological factors
sunshine
temperature
humidity
correlation analysis
