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[1]CHEN Jing,CUI Xiangxin,DING Yanlong,et al.Exploring the Temporal and Spatial Evolution Trend of Soil Nutrients of Different Plantation Ages Based on the Fertile Island[J].Research of Soil and Water Conservation,2019,26(06):71-79.

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Exploring the Temporal and Spatial Evolution Trend of Soil Nutrients of Different Plantation Ages Based on the Fertile Island

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 71-79 Column: Public date: 2019-10-17

Title:: Exploring the Temporal and Spatial Evolution Trend of Soil Nutrients of Different Plantation Ages Based on the Fertile Island

Author(s):: CHEN Jing¹, CUI Xiangxin¹, DING Yanlong¹, WANG Zeyu², LIU Zongqi³, SHI Tao¹; 1. College of Desert Control and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. Ordos Forestry Planning and Design Institute, Ordos, Inner Mongolia 017000, China;
3. Inner Mongolia Forestry Science Institute, Hohhot 010010, China

Keywords:: fertile island; Haloxylon ammodendron; enrichment rate; arid desert area

CLC:: S158.3

DOI:: -

Abstract:: In order to clarify the spatial and temporal evolution trend of soil nutrient utilization mechanism of planted Haloxylon ammodendron in arid desert areas, the planted Haloxylon ammodendron with the plantation ages of 2 years, 5 years, 10 years, 15 year, and 30 years in the southwestern margin of Ulan Buh were selected as the research samples. The spatial distribution and enrichment effects of soil nutrients in different ages of Haloxylon ammodendron were analyzed by field investigation and laboratory experiments. The conclusions were drawn as follows. (1) The soil nutrients of the planted sand bogs of different ages demonstrated the significant stratification distribution, the nutrient contents decreased in the order:0-10 cm > 10-20 cm > 20-40 cm, among them, soil organic matter, alkali nitrogen, available phosphorus and available potassium of surface layer were 82.0%, 228.2%, 172.7% and 39.0% higher than the averages of deep layers, and the accumulation of nutrients in surface soil was more obvious, indicating that most of the nutrients in the topsoil mainly resulted from plants litter material. (2) The soil nutrient content in the horizontal direction showed significant difference in 15~30 years, soil organic matter, alkali nitrogen, available phosphorus and available potassium in roots, shrubs and intercropping increased by 30.8% and 38.0%, 196.7% and 15.6%, 22.5% and 8.3%, and 56.4% and 10.6%, respectively. The enrichment rates were significantly higher than other forest ages. The nutrients in surface layers (0-10 cm, 10-20 cm) increased with the increase of forest age, while the nutrients in the deep layer (20-40 cm) decreased first and then rose. The results showed that the soil ‘fertile island’ of the artificial Haloxylon ammodendron was stronger than that of the low forest age, because the nutrient accumulation rate was strong and the nutrient consumption was large in 10 years, the ‘fertile island’ was weak. (3) The growth indexes of Haloxylon ammodendron were closely related to the enrichment and distribution of soil organic matter and alkali nitrogen, indicating that soil organic matter and alkali nitrogen content are more heterogeneous in space-time heterogeneity. Spatial and temporal heterogeneity of potassium is weak, which indicates that there is a significant spatial and temporal coupling relationship between planted Haloxylon ammodendron and soil nutrients in the arid desert areas.

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