首页|不同种植模式对坡耕地红壤有机碳氮组分的影响

不同种植模式对坡耕地红壤有机碳氮组分的影响

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探究不同种植模式下红壤有机碳、氮组分的变化规律，为改善红壤质量具有重要意义。通过小区试验，以玉米//萝卜间作(MS)、玉米//大豆间作(MR)、单种玉米(MM)、单种大豆(RR)和单种萝卜(SS)为研究对象进行探讨。结果显示，间作能够促进土壤有机碳(SOC)、全氮(TN)和微生物量碳(MBC)、氮(MBN)及可溶性有机碳(DOC)、氮(DON)含量的增加，其中MBC和MBN含量的提升效果较显著。MR处理的SOC、MBC和DOC含量较MM和RR处理分别提高18。40%～31。60%和5。40%～52。10%，TN、MBN和DON含量分别提高13。40%～84。30%和19。20%～64。40%;MS处理SOC、MBC 和DOC含量较MM和SS处理分别提高 5。10%～9。60%和12。00%～53。80%，TN、MBN和DON含量分别提高2。70%～31。00%和0。80%～23。42%。其中，MBC 和DON 含量占SOC和TN的比重较大，分别为1。00%～1。71%和5。10%～14。18%。相关性分析表明，各碳、氮组分含量与土壤有机碳、氮呈显著正相关，其中DOC与SOC、MBN与TN之间的相关系数均高于 0。70，说明DOC与MBN可较好地反映土壤SOC和TN的动态变化。综上所述，间作种植是有利于研究区内坡耕地水土保持和土壤肥力的关键技术措施之一。
Effects of different planting patterns on organic carbon and nitrogen components of red soil in sloping farmland
It is of great significance to study the changes of organic carbon and nitrogen components of red soil under different planting patterns to improve the quality of red soil.Through the plot experiment,five planting patterns of maize//radish intercropping(MS),maize//soybean intercropping(MR),maize monoculture(MM),soybean monoculture(RR)and radish monoculture(SS)were set up.The results showed that intercropping promoted the increase of soil organic carbon(SOC)and nitrogen(TN),microbial biomass carbon(MBC)and nitrogen(MBN),dissolved organic carbon(DOC)and nitrogen(DON)content,among which the enhancement effect of MBC and MBN content was more significant.Compared with MM and RR,the contents of SOC,MBC and DOC in MR treatment were increased by 18.40%-31.60%and 5.40%-52.10%,respectively,while the contents of TN,MBN and DON were increased by 13.40%-84.30%and 19.20%-64.40%,respectively.Compared with MM and SS treatments,the contents of SOC,MBC and DOC in MS treatment were increased by 5.10%-9.60%and 12.00%-53.80%,respectively,while the contents of TN,MBN and DON were increased by 2.70%-31.00%and 0.80%-23.42%,respectively.The contents of MBC and DON accounted for the larger proportion of SOC and TN,which were 1.00%-1.71%and 5.10%-14.18%,respectively.The correlation analysis showed that the content of each carbon and nitrogen component was significantly and positively correlated with SOC and TN,with the correlation coefficients between DOC and SOC,MBN and TN above 0.70,indicating that DOC and MBN could better reflect the dynamic changes of SOC and TN.In conclusion,the content of carbon and nitrogen components in red soil under intercropping is more advantageous than that under monoculture,which can be used as a technical measure for soil and water conservation,fertilizer increase and efficiency improvement of slope cultivated land in this area.

sloping cultivated red soilintercroppingsoil active carbon fractionssoil active nitrogen fractions

杨春怀、李永梅、李孝梅、鲁泽让、赵吉霞

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云南农业大学资源与环境学院,云南 昆明 650201

坡耕地红壤 间作 土壤活性碳组分 土壤活性氮组分

国家重点研发计划国家重点研发计划国家重点研发计划

2022YFD19015002022YFD19015012022YFD1901502

2024

10.11838/sfsc.1673-6257.23337

中国土壤与肥料
中国农业科学院农业资源与农业区划研究所 中国植物营养与肥料学会

中国土壤与肥料

CSTPCD北大核心
影响因子：1.197
ISSN：1673-6257
年,卷(期)：2024.(5)
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