刀明宽, 刘云根, 王妍, 等. 土地利用方式对峰丛洼地石漠化区土壤酶活性及肥力的影响[J]. 西南林业大学学报(自然科学), 2024, 44(5): 1–8. DOI: 10.11929/j.swfu.202307029
引用本文: 刀明宽, 刘云根, 王妍, 等. 土地利用方式对峰丛洼地石漠化区土壤酶活性及肥力的影响[J]. 西南林业大学学报(自然科学), 2024, 44(5): 1–8. DOI: 10.11929/j.swfu.202307029
Dao Mingkuan, Liu Yungen, Wang Yan, Yao Ping, Shao Han, Zhang Shuilin, Ma Lina, Zhang Lingkai. Effects of land use patterns on soil enzyme activity and fertility in rocky desertification area of peak-cluster depression[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202307029
Citation: Dao Mingkuan, Liu Yungen, Wang Yan, Yao Ping, Shao Han, Zhang Shuilin, Ma Lina, Zhang Lingkai. Effects of land use patterns on soil enzyme activity and fertility in rocky desertification area of peak-cluster depression[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202307029

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土地利用方式对峰丛洼地石漠化区土壤酶活性及肥力的影响

Effects of land use patterns on soil enzyme activity and fertility in rocky desertification area of peak-cluster depression

  • 摘要: 选取典型峰丛洼地石漠化区不同土地利用方式中土壤蔗糖酶、脲酶、磷酸酶3个酶指标,有机质、全氮、全磷、碱解氮、速效磷5个肥力指标,利用土壤酶指数法(SEI)和土壤肥力综合指数法(IFI),对石漠化地区土壤酶活性及肥力进行分析。结果表明:不同土地利用方式酶活性存在显著差异(P<0.05),土壤蔗糖酶、脲酶、磷酸酶活性变化范围分别为20.15~40.05、32.05~109.59、0.81~1.06 mg/(g·24 h),土壤酶指数变化为灌草地(0.581)>乔灌草地(0.517)>玉米地(0.479)>猕猴桃地(0.381)>核桃地(0.369)>撂荒地(0.348);不同土地利用方式土壤肥力存在显著差异(P<0.05),有机质、碱解氮、全氮、全磷、速效磷含量分别为27.96~76.25 g/kg、99.40~263.45 mg/kg、1.002~2.35 g/kg、0.41~1.19 g/kg、4.67~21.73 mg/kg,土壤综合肥力指数变化为撂荒地(0.978)>灌草地(0.868)>玉米地(0.733)>核桃地(0.665)>乔灌草地(0.476)>猕猴桃地(0.421);除猕猴桃地外,峰丛洼地石漠化区其他土地利用方式土壤酶活性和肥力存在显著相关性(P<0.05)。为提高峰丛洼地石漠化区土地的修复和合理利用,对于撂荒地应极力减少人为干扰,对于有人为干扰的灌草地、乔灌草地、玉米地、核桃地、猕猴桃地,可通过合理的人工措施来提高土壤质量,灌草地可以作为峰丛洼地石漠化区生态恢复过程中优先考虑的土地利用类型。

     

    Abstract: Studying the effects of different land use patterns on soil enzyme activity and fertility in rocky desertification area of peak-cluster depression can provide scientific theoretical basis for the restoration and utilization of degraded land in rocky desertification area of peak-cluster depression. Three enzyme indexes of soil sucrase, urease and phosphatase and five fertility indexes of organic matter, total nitrogen, total phosphorus, alkali-hydrolyzable nitrogen and available phosphorus in different land use patterns in typical peak-cluster depression area were selected. Soil enzyme index method( SEI ) and soil fertility index method( IFI ) were used to study soil enzyme activity and fertility in rocky desertification area. (1) There were significant differences in enzyme activities of different land use modes(P < 0.05), and the range of soil sucrase, urease and phosphatase activities in different land use modes was 20.15~40.05 mg/(g·24 h), 32.05~109.59 mg/(g·24 h), 0.81~1.06 mg/(g·24 h), The changes of soil enzyme index were as follows: shrub grassland(0.581) > arbor shrub grassland(0.517) > maize field(0.479) > kiwifruit land(0.381 > walnut land(0.369) > wasteland(0.348);(2) There were significant differences in soil fertility between different land use methods(P < 0.05), and the contents of organic matter, alkaline hydrolyzable nitrogen, total nitrogen, total nitrogen, total phosphorus and available phosphorus in different land use methods were 27.96~76.25 g/kg, Between 99.40~263.45 mg/kg, 1.002~2.35 g/kg, 0.41~1.19 g/kg, 4.67~21.73 mg/kg, the changes of soil comprehensive fertility index were as follows: barren land(0.978) > shrub grassland(0.868) > maize field(0.733) > walnut field(0.665) > arbor shrub grassland(0.476) > kiwi land(0.421);(3) In addition to kiwifruit field(P > 0.05), there was a significant correlation between soil enzyme activity and fertility in other land use modes in the rocky desertification area of the peak-cluster depression(P < 0.05). Different land use patterns in the rocky desertification area of the peak-cluster depression have a significant impact on soil enzyme activity and fertility. There is a certain correlation between soil enzyme activity and soil fertility. In order to restore and rationally use the land in the rocky desertification area of the peak-cluster depression, human interference should be minimized for abandoned land. For shrub grassland, arbor-shrub grassland, corn land, walnut land, and kiwifruit land with human intervention, reasonable artificial measures can be applied to improve soil quality. Shrub grassland can be used as a priority land use type in the ecological restoration process of the rocky desertification area of the peak-cluster depression.

     

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