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[1]LIU Yuan,CHEN Yunming,LIANG Siqi,et al.Soil Ecological Stoichiometry Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly Region of Northern Shaanxi Province[J].Research of Soil and Water Conservation,2019,26(04):43-49.

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Soil Ecological Stoichiometry Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly Region of Northern Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 04 Page number: 43-49 Column: Public date: 2019-06-11

Title:: Soil Ecological Stoichiometry Characteristics of Robinia pseudoacacia Plantation in the Loess Hilly Region of Northern Shaanxi Province

Author(s):: LIU Yuan¹, CHEN Yunming^1,2, LIANG Siqi¹, CHEN Chen¹; 1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: soil; characteristics of ecological stoichiometry; Robinia pseudoacacia plantation; loess hilly region

CLC:: S154.1

DOI:: -

Abstract:: To understand the characteristics of soil ecological stoichiometry and the relationships between soil depth and soil ecological stoichiometry in Robinia pseudoacacia plantation with 9 year, 17 year, 30 year age, respectively, in the loess hilly region, the field investigations and laboratory analyses were carried out to study the soil ecological stoichiometry characteristics and its relationship with soil depth. The results showed that: (1) with the growth of Robinia pseudoacacia plantation, the contents of the carbon (C), nitrogen (N) increased and a significant positive correlation between them existed; and the contents of the phosphorus (P) increased first and then decreased, and the soil P elements should be supplemented in the later growth years; The content of potassium (K) decreased with the growth of Robinia pseudoacacia plantation; (2) the contents of soil C and N decreased with the increase of soil depth and had a significant negative correlation with soil depth; P content evenly distributed throughout the soil, with little change in soil profile; K content increased with the increase of soil depth, and had a significant positive correlation with soil depth; (3) the soil C:N, C:P, C:K, N:P, N:K, and P:K all showed the increasing trend with the increase of years; in the 0—100 cm soil layer, the soil C:N had a narrow range of 8.52 to 8.96; C:P, C:K, N:P and N:K gradually decreased and then tended to be stable with the increase of soil depth. These results can provide the basis for the judgment of nutrient limiting elements and the balance regulation mechanism of plantation ecosystem in the loess hilly region.

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