CAO Hanbing, XIE Junyu, WANG Chuhan, et al. Effects of Different Fertilization Regimes on Reclaimed Soil Structure and Maize Quality in Dryland[J]. 2021, 35(2): 251-257.
DOI:
CAO Hanbing, XIE Junyu, WANG Chuhan, et al. Effects of Different Fertilization Regimes on Reclaimed Soil Structure and Maize Quality in Dryland[J]. 2021, 35(2): 251-257. DOI: 10.13870/j.cnki.stbcxb.2021.02.033.
Effects of Different Fertilization Regimes on Reclaimed Soil Structure and Maize Quality in Dryland
To better understand the mechanism of soil organic carbon (SOC) sequestration in the reclaimed coal-mining subsiding region
we investigated the response of the structure of reclaimed soil and maize quality. Top soil samples (0—20 cm) and maize grain were collected from different treatments of a 1-year reclaimed field
and the wet sieving method was used to analyze the changes of soil organic carbon and total nitrogen (TN) contents within water-stable aggregates and silt and clay fractions
and grain analyzer was used to analyze protein
starch and fat contents in maize grain. The experiment was set up with four treatments:no fertilizer (CK)
chemical fertilizer (NPK)
organic fertilizer (M) and combined application of organic and inorganic fertilizer (MNPK).The results showed that compared with CK
NPK treatment significantly increased TN content
maize grain yield
starch and fat content by 11.23%
98.53%
1.16% and 12.71% respectively. The M treatment significantly increased SOC
TN
the organic carbon contents
grain yield
protein
starch and fat contents in >2 mm and 0.25~2 mm aggregates by 44.77%
13.23%
52.73%
60.22%
255.15%
23.28%
1.67% and 12.71%
respectively. The MNPK treatment significantly increased SOC
TN
SOC and TN contents in aggregates of various particle sizes and powder clay components (except for total nitrogen content in 0.25~2 mm aggregates)
maize grain yield
protein
starch and fat contents. The increase was 46.21%
29.08%
39.23% (>2 mm-C)
49.07% (0.25~2 mm-C)
110.41% (0.053~0.25 mm-C)
40.35% (<0.053 mm-C))
22.48% (>2 mm—N)
43.29% (0.053~0.25 mm—N)
33.33% (<0.053 mm—N)
211.37%
35.34%
0.48% and 25.18%
respectively. This study shows that when the nutrient input is the same
the combined application of organic and inorganic fertilizers (MNPK) is beneficial to the physical protection of organic carbon by reclaimed soil aggregates in the coal mining subsidence area
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