[1]PANG Fei,LI Zhigang,LI Jian.Effects of Incorporated Organic Materials with N Fertilizer on Soil Carbon Mineralization of Desertified Soil in Ningxia[J].Research of Soil and Water Conservation,2018,25(03):75-80.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 03
Page number:
75-80
Column:
Public date:
2018-04-10
- Title:
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Effects of Incorporated Organic Materials with N Fertilizer on Soil Carbon Mineralization of Desertified Soil in Ningxia
- Author(s):
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PANG Fei1,3, LI Zhigang2,3, LI Jian3
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1. School of Life Sciences, Ningxia University, Yinchuan 750021, China;
2. School of Agronomy, Ningxia University, Yinchuan 750021, China;
3. State Key Laboratory of the Seedling Bioengineering, Ningxia Forestry Institute, Yinchuan 750004, China
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- Keywords:
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organic material; nitrogen fertilizer; soil organic carbon mineralization; desertified soils
- CLC:
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S156.5
- DOI:
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- Abstract:
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The local poplar branch and corn straw in NingXia were used as the test materials. Through indoor simulation experiment with treatments of no addition (N), addition of branches (B), addition of straws (S) combining with nitrogen fertilizer of different contents (N0, 0 mg/kg; N1, 40 mg/kg; N2, 50 mg/kg; N3, 60 mg/kg), we investigated the soil organic carbon mineralization and soil microbial properties of desertified soils in Ningxia. The results showed that the soil organic C mineralization rates of all treatments sharply declined at the first day of incubation, decreased by 72.47%~96.54% (N), 55.58%~63.43% (B), 65.92%~75.38% (S), respectively, over 3 days. The soil organic carbon cumulative mineralization amounts of the treatments were 0.65~0.88 g/kg (N), 0.58~0.99 g/kg (B),0.63~1.44 g/kg (S), respectively. At the same N application rate, the mineralization cumulative amounts of soil carbon, MBC, MBN, enzymes activity of all kinds of treatment presented the order:S > B > N, which increased or decreased after first rise with the increased of N application amount under the same kind of organic material (except MBN, urease activity of N). The correlations between soil mineralization cumulative amount, mineralization rate and carbon,nitrogen, MBC, MBN, enzyme activity were highly insignificant (p<0.01). Organic material, nitrogen fertilizer and the interaction of them significantly influenced on soil mineralization cumulative amount in general, mineralization rate (F > F0.01). The study results can provide the successful case of sandy soil improvement in Ningxia and the other arid and semiarid areas of north China.