Spatiotemporal Distribution of Water and Nitrogen in Border Irrigation and Its Relationship with Root Absorption Properties

The spatiotemporal distribution characteristics of water and nitrogen in the soil profile are essential influencing factors that determine development crop root systems. purpose this study was to clarify inter-row inter-tree variability moisture apple zone, effective diameter ranges trees influence absorption. method used a 2-year border irrigation experiment carried out traditional orchard Zuncun, Shanxi Province, China. Dynamic variations between within row (perpendicular direction irrigation) rows (along were continuously measured from 2015 2016, specific excavated analyze water, nitrogen, roots with different diameters. results showed obvious surface 0–30 cm, content 5% higher than row. length density 33.5% rows. Bivariate correlation analysis system ranked highest lowest: total (0.741) > nitrate (−0.36) (−0.273). coefficient Lower resulted increased biomass more active uptake activity There significant correlations contents showing 1.5 mm correlated content, whereas 2.0 content. findings provide deeper understanding absorption mechanism for nitrogen.