GAO Pan.Effects of Deep Loosening and Straw Mulching on Soil Carbon Composition and Maize Yield in Semi-Arid Areas[J].HEILONGJIANG AGRICULTURAL SCIENCES,2024,(01):7-11.[doi:10.11942/j.issn1002-2767.2024.01.0007]
深松与秸秆覆盖还田对半干旱区土壤碳组分和玉米产量的影响
- Title:
- Effects of Deep Loosening and Straw Mulching on Soil Carbon Composition and Maize Yield in Semi-Arid Areas
- 文章编号:
- 2
- Keywords:
- deep loosening; straw covering and returning to the field; soil organic carbon; organic carbon with different particle sizes; water soluble organic carbon; yield
- 文献标志码:
- A
- 摘要:
- 为促进黑龙江省西部半干旱区土壤固碳和玉米增产，以黑龙江省农业科学院耕作与秸秆长期定位试验田为研究对象，以CK(常规种植)、NFG（秸秆覆盖还田）、SFG（深松+秸秆覆盖还田）3种处理对土壤有机碳、不同粒径有机碳、水溶性有机碳含量及玉米产量的影响进行分析，研究深松与秸秆覆盖还田对半干旱区土壤碳组分和玉米产量的影响。结果表明，（1）本试验中，在0~10 cm和10~20 cm土层的土壤有机碳和水溶性有机碳含量顺序均为SFG>NFG>CK。（2）<0.053 mm 粒级团聚体有机碳含量明显高于>0.250 mm和0.053~0.250 mm粒级，在0~10 cm土层，SFG、NFG处理土层>0.250 mm、<0.053 mm和0.053~0.250 mm粒级团聚体有机碳含量均比对照CK提高10%以上。（3）在10~20 cm土层，SFG处理>0.250 mm粒级和NFG处理0.053~0.250 mm粒级团聚体有机碳含量增加较为明显。（4）不同处理之间玉米穗长、穗粗和穗行数差异不显著，穗粒数和产量差异达到显著水平，其中SFG和NFG处理分别较CK产量提高了28.57%和15.10%。产量与土壤有机碳含量之间呈极显著正相关关系，与团聚体有机碳和水溶性有机碳含量呈显著正相关关系。
- Abstract:
- In order to promote soil carbon sequestration and maize yield increase in the semi-arid region of western Heilongjiang Province, the long-term positioning experimental field of cultivation and straw at the Heilongjiang Academy of Agricultural Sciences was taken as the research object. The effects of CK (conventional planting), NFG (straw mulching and returning), and SFG (deep loosening+straw mulching and returning) treatments on soil organic carbon, different particle size organic carbon, water-soluble organic carbon content, and yield were analyzed, Study the effects of deep loosening and straw mulching on soil carbon composition and maize yield in semi-arid areas. The results indicate that: (1) The order of soil organic carbon and water-soluble organic carbon content in the 0-10 cm and 10-20 cm soil layers is SFG>NFG>CK. (2) In this experiment, the organic carbon content of clay particles (<0.053 mm) was significantly higher than that of sand particles (>0.250 mm) and silt particles (0.053-0.250 mm). （3）In the 0-10 cm soil layer, the organic carbon content of sand particles (>0.250 mm), clay particles (<0.053 mm), and silt particles (0.053-0.250 mm) treated with SFG and NFG increased by more than 10% compared to the control CK. In the 10-20 cm soil layer, the organic carbon content of SFG treated sand particles (>0.250 mm) and NFG treated powder particles (0.053-0.250 mm) increased significantly. (4) There was no significant difference in maize ear length, ear diameter, and ear row number among different treatments. The difference in grain number and yield per spike reached a significant level. Among them, SFG and NFG treatments increased the yield by 28.57% and 15.10% respectively compared to CK. There is a highly significant (P<0.01) positive correlation between yield and soil organic carbon content, and a significant (P<0.05) positive correlation with organic carbon and water-soluble organic carbon content of different particle sizes.
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备注/Memo
收稿日期：2023-11-07