Distribution of Soil Nutrients in Loess Hilly and Gully Area

Abstract

To understand the spatial distribution characteristics of soil nutrients after reclaiming the land in the loess hilly and gully region. We collected the soil profile data of 2m soil layer from the end of the ditch to the head of the ditch. The results showed that: (1) The average available phosphorus, available potassium and organic matter content of the soil in the gully area of the loess hilly and gully region were at a low level. The content of average available phosphorus and organic matter decreased first and then increased with the increase of soil depth. The content of average available potassium decreased with the depth deepening. The gully soil was alkaline and the pH value along with the soil depth. The increase is gradually increasing. (2) The content of available phosphorus gradually decreased, and the content of available potassium and pH value gradually increased. The spatial distribution characteristics of organic matter are similar to the spatial distribution of available phosphorus, and the content of available phosphorus is enriched below the trough end to the middle of the gully.