Effects of Optimized Fertilization Treatments on Soil Aggregate Characteristics and Organic Matter Content of Newly Reclaimed Cultivated Land in Loess Plateau

doi:10.13961/j.cnki.stbctb.2021.05.014

Home > Archive>Volume 41, Issue 5, 2021 >99-106. DOI:10.13961/j.cnki.stbctb.2021.05.014

Effects of Optimized Fertilization Treatments on Soil Aggregate Characteristics and Organic Matter Content of Newly Reclaimed Cultivated Land in Loess Plateau
DOI:
                        10.13961/j.cnki.stbctb.2021.05.014
                    
Author:
                        Liu ZheLiu Zhe
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Zhang YangZhang Yang
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China
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Lei NaLei Na
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Zhang TingyuZhang Tingyu
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Xiong YufeiXiong Yufei
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Zhang PanpanZhang Panpan
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Li YananLi Yanan
Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710075, China;Key Laboratory of Degraded and Unused Land Consolidation Engineering, the Ministry of Natural Resources, Xian, Shaanxi 710021, China;Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xian, Shaanxi 710021, China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xian, Shaanxi 710075, China
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Clc Number:S152.4;S158.3
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Abstract:

[Objective] The effects of optimizing fertilization on improving soil quality and crop yield of newly cultivated land were studied in order to provide a theoretical basis for the establishment of reasonable optimized fertilization recommendations and the sustainable development of newly reclaimed cultivated land in the Loess Plateau.[Methods] The improvement effects of organic fertilizer (OF), organic fertilizer combined with chemical fertilizer (NP), and conventional fertilization (CF) on soil organic matter (SOM), soil aggregate distribution, structure stability, and corn yield in newly reclaimed cultivated land were evaluated using pot experiments.[Results] SOM content of newly reclaimed cultivated land was the lowest (7.08 g/kg) under CF, with low aggregate content and poor structural stability. OF and NP significantly increased SOM content of the newly reclaimed cultivated land (p<0.05) compared with CF. The particle size>0.25 mm aggregate concentration (R_0.25) and aggregate stability were also significantly improved. The OF treatment had the greatest effect on improving the quantity and stability of soil aggregates. In the 0-10 cm soil layer, the SOM content under OF and NP treatments was 12.67 g/kg and 11.79 g/kg, respectively, which was 46.2% and 36.1% higher than SOM under CF. Moreover, the mean weight diameter (MWD), geometric mean diameter (GMD) and R_0.25 values of water-stable aggregates under OF were 62.5%, 21.4%, and 148.3% higher, respectively, than those values under CF, and the fractal dimension (D) was 1.7% lower than under CF. Meanwhile, the MWD, GMD, and R_0.25 values under NP were 18.8%, 3.6%, and 40.9% higher, respectively, than those values under CF, and the D value was 0.4% lower than under CF. In the 10-20 cm soil layer, the SOM content and the quantity and structural stability of soil aggregates under OF and NP were also increased to a certain extent. The MWD, GMD, and the SOM content showed significant positive correlations (p<0.001).[Conclusion] Optimizing fertilization is an effective measure for improving soil structure stability, fertility retention characteristics, and land productivity in newly reclaimed cultivated land.

Key words:optimizing fertilization;newly reclaimed cultivated land;soil organic matter;soil aggregates

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刘哲,张扬,雷娜,张庭瑜,熊宇斐,张盼盼,黎雅楠.优化施肥方式对黄土高原新增耕地土壤有机质含量和团聚体特性的影响[J].水土保持通报英文版,2021,41(5):99-106

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Received:April 29,2021
Revised:June 30,2021
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Online: October 25,2021
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