YE Qing, SHI Dongmei, ZENG Xiaoying, et al. Effects of Soil Management Measures for the Quality of Eroded Cultivated-layer in Purple Soil Sloping Farmland[J]. 2020, 34(4): 164-170.
DOI:
YE Qing, SHI Dongmei, ZENG Xiaoying, et al. Effects of Soil Management Measures for the Quality of Eroded Cultivated-layer in Purple Soil Sloping Farmland[J]. 2020, 34(4): 164-170. DOI: 10.13870/j.cnki.stbcxb.2020.04.025.
Effects of Soil Management Measures for the Quality of Eroded Cultivated-layer in Purple Soil Sloping Farmland
Purple soil sloping farmland is an important cultivated land resource in southwest China. In order to explore the influence of soil management measures on the quality of eroded arable cultivated-layer of purple soil sloping farmland
the purple soil sloping farmland cultivated-layer soil is used as the research object
the soil erosion simulation plot was used to establish different erosion degree (erosion years) of sloping farmland location test
fertilizer management measure (F) and chemical fertilizer + biochar management measure (F + B) are set up
taking no fertilizer as a control (CK).Soil quality index method is used to analyze and evaluate the quality recovery effect of eroded cultivated-layer on purple soil sloping farmland and characteristics of indicator change with different management measures. Results show: (1) The effects of the two management measures on the physical and chemical properties of the soil cultivated-layer of purple soil sloping farmland were significant. F management measure can not improve soil structure
but can improve soil nutrient. Under B+F management measure
soil bulk density is minimal
soil total pores
capillary pores and saturated water content increase
and organic matter content is the highest
12.45 g/kg. Soil nutrient status is best. (2) Both F and B+F management measures can improve the shear strength of 0-10 cm soil layer
which makes the surface soil resist shear failure
which is conducive to soil erosion control
and the soil penetration resistance decreases under the other two management measures. Promote the growth and development of crop roots. (3) The two management measures improved the soil quality of the cultivated-layer of purple soil sloping farmland. The soil quality index was B+F (0.686)
F(0.625) and CK(0.595)
and the soil quality of B+F management measure was higher. Compared with CK (0.595)
it increased by 15.3%
which was 9.8% higher than F (0.625). B+F management measure had the best effect on soil quality improvement of sloping farmland. B+F management measures can effectively improve soil structure and increase soil nutrient content
which is more suitable for quality restoration of cultivated-layer and soil erosion control in purple sloping farmland. The research results can provide suitable management measures for quality restoration of eroded cultivated-layer in purple soil sloping farmland. It is of great significance for the sustainable use of purple soil sloping farmland.
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