论文部分内容阅读
为了研究冬季增温对土壤水分及盐碱化的影响,采用红外线辐射器增温法,在宁夏引黄灌区西大滩试验站进行了大田试验。结果表明,冬季增温0.5～2.5℃与未增温比较,土壤层0～20、>20～40、>40～60cm土壤含水率分别减少0.2%～3.9%、0.4%～1.4%、0.3%～0.6%;碱化度分别增加1.2%～4.4%、0.1%～0.4%、0.2%～0.6%;总碱度分别增加0.01～0.04、0.01～0.03、0.01～0.02cmol/kg;pH值分别增加0.1～1.0、0.1～0.5、0.1～0.6;全盐分别增加0.05～0.71、0.02～0.20、0.01～0.11g/kg。冬季增温加剧了土壤水分蒸发,增强了土壤盐碱化,导致土壤盐碱化危害加剧。
In order to study the effect of winter warming on soil moisture and salinization, a field experiment was carried out in Xida Beach Experimental Station of Yellow River Irrigation Area in Ningxia by using the method of warming up infrared radiation. The results showed that soil water content in 0-20,> 20-40,> 40-60 cm soil layer decreased by 0.2% -3.9%, 0.4% -1.4%, 0.3% ~ 0.6% respectively; the alkalization degree increased by 1.2% -4.4%, 0.1% -0.4%, 0.2% -0.6% respectively; the total alkalinity increased by 0.01-0.04,0.01-0.03,0.01-0.02cmol / kg respectively; Increase 0.1 ~ 1.0, 0.1 ~ 0.5, 0.1 ~ 0.6; whole salt increased by 0.05 ~ 0.71,0.02 ~ 0.20,0.01 ~ 0.11g / kg. Winter warming exacerbated the evaporation of soil moisture, increased soil salinization, leading to aggravating the harm of soil salinization.