[1]LIU Yuanyuan,SUN Benhua,PI Xiaomin,et al.Post-Effects of Organic Material Input on Soil Carbon and Nitrogen on Anthropogenic Loess Soil in Guanzhong Area[J].Research of Soil and Water Conservation,2018,25(04):71-76.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 04
Page number:
71-76
Column:
Public date:
2018-06-13
- Title:
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Post-Effects of Organic Material Input on Soil Carbon and Nitrogen on Anthropogenic Loess Soil in Guanzhong Area
- Author(s):
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LIU Yuanyuan1, SUN Benhua1,3, PI Xiaomin1, ZHANG Tongxun1, LIU Pingjing1, GAO Mingxia2, FENG Hao2,3,4
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1. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China
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- Keywords:
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organic materials; soil organic carbon; dissolved organic carbon and nitrogen; nitrate nitrogen; anthropogenic loess soil
- CLC:
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S153.6;S152.7
- DOI:
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- Abstract:
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Soil organic carbon and nitrogen are the key factors of soil fertility, and organic material application is an effective measure to improve soil organic carbon and nitrogen. We studied and compared the post-effects of inputs of different organic materials on soil organic carbon, total nitrogen, dissolved organic carbon and nitrogen in the top layer (0—20 cm) and the distribution of soil nitrate and water in 0—200 cm depth. The results showed that compared with CK (p<0.05), the soil organic carbon (SOC) under the treatments of straw together with nitrogen and phosphorus fertilizers (SNP), and biochar together with nitrogen and phosphorus fertilizers (BNP) increased by 29.5% and 29.8%, respectively after 2 years of the application of organic materials. The soil total nitrogen contents under the treatments of nitrogen and phosphorus fertilizer(NP), Organic fertilizer together with nitrogen and phosphorus fertilizer (MNP), straw together with nitrogen and phosphorus fertilizers(SNP) and biochar together with nitrogen and phosphorus fertilizers(BNP) increased by 22.0%, 14.3%, 24.2% and 26.4%, respectively (p<0.05). The soil dissolved organic carbon (DOC) of BNP was 23.4%, 10.9%, 21.3% and 20.5% higher than that of other treatments (CK, NP, MNP and SNP), respectively (p<0.05). The soil dissolved organic nitrogen (DON) of all fertilization treatments were 39.3%, 29.3%, 34.5% and 52.3% higher than that of CK, respectively (p<0.05). Compared with CK, the fertilization treatment significantly improved the nitrate content in the surface soil and increased the nitrate accumulation in the 0—100 cm soil layer (p<0.05). Compared with NP treatment, MNP and SNP significantly increased nitrate accumulation in 0—200 cm soil layer (p<0.05), while it was not significantly different from BNP. Compared with CK, NP, MNP, SNP and BNP could significantly increase the soil water content in 0—20 cm soil layer and the water storage in 0—40 cm soil layer and BNP treatment was Significantly higher than treatments of SNP and MNP (p<0.05). In general, the post-effects of biochar on the improvement and maintenance of the soil fertility and the reduction of the risk of nitrate leaching in the profile were more significant than that of straw and organic fertilizer. Therefore, application biochar was a much better way to apply organic material to the anthropogenic soil of dry land area in Guanzhong Area of Shaanxi.