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[1]JU Ping,LI Liangjun,LI Li.Response of Soil Nitrogen to Erosion Environment in Different Vegetation Types[J].Research of Soil and Water Conservation,2018,25(06):1-6.

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Response of Soil Nitrogen to Erosion Environment in Different Vegetation Types

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 1-6 Column: Public date: 2018-10-26

Title:: Response of Soil Nitrogen to Erosion Environment in Different Vegetation Types

Author(s):: JU Ping¹, LI Liangjun' target="_blank" rel="external"> LI Liangjun², LI Li¹; 1. School of Landscape Architecure and Horticulture, Yangzhou Vocational College, Yangzhou, Jiangsu 225002, China;
2. College of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu 225009, China

Keywords:: Loess Plateau; vegetation types; soil nitrogen; erosion environment

CLC:: S157;S714

DOI:: -

Abstract:: Three typical vegetation types (forest grass, and shrub) in the three types of erosion environments (hilltop, hillside, and ravine slope), and 0—30 cm soil layers of forestland, grassland, and shrub land in Liudaogou watershed on the Loess Plateau of China were selected. The response of five fractions of soil nitrogen (total nitrogen, organic nitrogen, mineralizable nitrogen, ammonium nitrogen, nitrate nitrogen) to the erosion environment was studied. The results showed that: (1) the contents of total nitrogen and organic nitrogen in the forestland soil were the highest, which was significantly higher than those in grassland and shrub land, the contents of soil nitrogen in different vegetation types varied with erosion environments; (2) the contents of mineralizable and nitrate nitrogen in forestland were higher than those in grassland and shrub land; the ammonium nitrogen content in shrub land was higher than those in forestland and grassland; (3) soil bulk density and pH were significantly negatively correlated with total nitrogen, organic nitrogen, mineralizable nitrogen, ammonium nitrogen, and nitrate nitrogen; organic carbon and C/N were associated with total nitrogen, organic nitrogen, mineralizable nitrogen, and ammonium; there was a significant positive correlation between nitrogen and nitrate nitrogen. (4) The ratio of mineralizable nitrogen to total nitrogen increased with the increase of total nitrogen content, and the proportion of ammonium nitrogen in nitrogen decreased with the increase of total nitrogen. The response of soil nitrogen in different vegetation types to the erosion environments can provide scientific basis for long-term agricultural production, ecological restoration and reconstruction on the Loess Plateau.

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