单膜孔肥液入渗影响因素试验研究

Experimental study on Influence Factor under Single Film Hole Fertilizer Solution Infiltration

通过室内入渗试验,研究了单因素变化条件下单膜孔肥液入渗特性。结果表明,单位膜孔面积的累积入渗量随着膜孔面积的增大而减小;土壤初始含水率越大,累积入渗量越大;土壤容重越大,累积入渗量越小;土壤的黏粒含量越高,土壤入渗能力越小;随肥液浓度的增加,入渗量增大。不同影响因素的单膜孔肥液累积入渗量均符合Kostiakov模型。建立了由垂直一维入渗参数来确定单膜孔肥液入渗参数的数学模型以及由清水入渗参数和肥液浓度推求不同浓度的肥液入渗量的数学模型。该成果为进行膜孔灌施肥技术研究奠定了理论基础。

Based on lab infiltration experiments ,infiltration characteristics of single film hole fertilizer infiltration under different in‐fluence factors were researched .The results showed that the cumulative infiltration amount of unit film hole area decreased with in‐creased film hole area;the cumulative infiltration amount increased with increased initial soil water content ;the cumulative infiltra‐tion amount decreased with increased soil bulk density ;the cumulative infiltration amount decreased with increased soil clay content;the cumulative infiltration amount increased with increased fertilizer concentration .Different fertilizer solution film hole infiltration factors of cumulative infiltration fit Kostiakov model .Models for the single film hole infiltration parameters of fertilizer solution de‐termined by the vertical one-dimensional infiltration parameters and different concentration of the fertilizer solution infiltration deter‐mined by water infiltration parameters and fertilizer concentration were established .The results lay a foundation for study of film hole irrigation fertilizer technique .