Abstract: The present application discloses an array substrate and a splicing screen. The array substrate provided by an embodiment of the present application includes: a flexible base, wherein the flexible base includes a display region, a first region and a second region, the display region and at least one of the first region and the second region are located in different planes, and the first region is located between the display region and the second region; a plurality of signal lines, arranged on the display region and the first region; a plurality of fan-out lines, arranged on the second region and connected with the plurality of signal lines in a one-to-one correspondence; and a buffer cushion, arranged on the first region, wherein an orthographic projection of the buffer cushion on the flexible base does not overlap with orthographic projections of the signal lines on the flexible base.

Abstract: A device for detecting soil nutrients on site, including an extracting grid, an on-site real-time detection assembly and a transfer assembly for transferring a soil extract from the extracting grid to the on-site real-time detection assembly. A soil nutrient detection method using the device and a microfluidic chip are also provided. The microfluidic chip includes a cover plate and a base plate. The base plate includes a soil extract feeding groove, a quantitative feeding groove, a reagent storage groove, and a serpentine groove.