论文部分内容阅读
以辽宁地区为研究区域,利用2004—2013年3—5月辽宁省49个气象站的土壤参数数据和常规气象要素的日值数据、2004—2010年5月辽西地区农业气象试验站土壤水分数据以及辽宁省各地区土壤参数进行统计分析,采用相关分析、回归分析、因子分析、插值分析等统计方法,研究了辽宁省播种期土壤相对湿度特征及其与土壤性质、作物种类和气象因子的关系。结果表明:辽宁省春季土壤相对湿度逐年平均增加1.6%,东南部地区的土壤相对湿度通常高于辽宁省的西北部;全省大部分地区土壤田间持水量处于20%~25%;耕种作物后土壤相对湿度降低5.6%~36.4%;在不同气象要素中,土壤相对湿度与前期土壤相对湿度的相关性最大(0.48),与水汽压的相关性最小(-0.08)。土壤自身性质、耕种作物种类和不同气象因素对土壤相对湿度均有影响。在春播期土壤湿度预报中,应充分考虑这些要素带来的影响。
Using the Liaoning area as the research area and the daily value data of 49 meteorological stations in Liaoning Province from March to May in 2004-2013 and routine meteorological elements, the soil moisture data of agricultural meteorological experimental stations in western Liaoning from May 2004 to May 2010 And the soil parameters in Liaoning Province were statistically analyzed. The correlation analysis, regression analysis, factor analysis, interpolation analysis and other statistical methods were used to study the relationship between soil relative humidity at sowing date and soil properties, crop species and meteorological factors in Liaoning Province . The results showed that the relative humidity of soil increased by 1.6% annually in Liaoning Province in spring and the relative humidity of soil in the southeast was higher than that in the northwest of Liaoning Province. The field capacity of soil in most of the province was between 20% and 25% The relative humidity of soil decreased by 5.6% ~ 36.4%. Among the different meteorological elements, the correlation between soil relative humidity and soil moisture had the highest correlation (0.48) and the lowest correlation with vapor pressure (-0.08). The nature of soil, the type of cultivated crops and different meteorological factors have an impact on soil relative humidity. In spring sowing soil moisture forecast, should take full account of the impact of these elements.