Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effects of Litter Decomposition on Soil N in Picea Mongolica Forest at Different Forest Ages

Version 1 : Received: 17 March 2022 / Approved: 18 March 2022 / Online: 18 March 2022 (15:17:41 CET)

A peer-reviewed article of this Preprint also exists.

Liu, Y.; Chen, L.; Duan, W.; Bai, Y.; Li, X. Effects of Litter Decomposition on Soil N in Picea mongolica Forest at Different Forest Ages. Forests 2022, 13, 520. Liu, Y.; Chen, L.; Duan, W.; Bai, Y.; Li, X. Effects of Litter Decomposition on Soil N in Picea mongolica Forest at Different Forest Ages. Forests 2022, 13, 520.

Journal reference: Forests 2022, 13, 520
DOI: 10.3390/f13040520

Abstract

The seasonal and vertical spatial variation characteristics of total N, NH4+—N and NO3-—N in the soil in Picea mongolica forest at different stand ages were studied. The results showed that: (1) NH4+ —N in the soil in Picea mongolica forest was positively correlated with sample date, soil NO3-—N and forest age (P <0.05), and negatively correlated with soil depth (P < 0.01). NO3-—N in the soil in Picea mongolica forest was negatively correlated with sample date and forest age (P < 0.05), and significantly negatively correlated with soil depth (P < 0.01); (2) the content of NH4+—N is greater than that of NO3-—N in each soil layer of Picea mongolica forest at three forest ages. The correlation analysis showed which had an impact on the content of NH4+—N and NO3-—N in the soil in Picea mongolica forest. The content was lower in February and November, and higher in May and August;(3) The contents of total N, NH4+—N and NO3-—N in the soil of Picea mongolica forest in the three forest ages increased with the depth of soil layer (0-50cm), and showed an overall downward trend. The contents of NH4+—N in the soil layer of young forest (0-10cm, 10-20cm and 20-30cm, 30-40cm and 40-50cm) were significantly different (P<0.05), and the contents of NO3-—N were also significantly different (P<0.05), while their contents of middle-aged forest and near mature forest increased with the depth of soil layer, There was no significant difference in the content of NH4+—N; (4) The content of NH4+—N in the soil in Picea mongolica forest generally showed the following change trend near mature forest > middle-aged forest > young forest. The change trend of soil NO3-—N content is consistent with that of the content of NH4+—N in the soil in Picea mongolica forest.

Keywords

Horqin sandy land; Picea mongolica forest; NH4+-N; NO3-—N; Seasonal dynamics

Subject

BIOLOGY, Forestry

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