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生态学杂志 ›› 2023, Vol. 42 ›› Issue (3): 552-560.doi: 10.13292/j.1000-4890.202303.019

• 研究报告 • 上一篇    下一篇

长期施肥对农牧交错带栗钙土土壤理化性质及生物学特性的影响

高日平1,2,3,4,赵沛义1,2,3,4,刘小月1,2,3,4,张君1,2,3,4,李焕春1,2,3,4,黄洁1,景宇鹏1,2,3,4*,段玉1,2,3,4*
  

  1. 1内蒙古自治区农牧业科学院, 呼和浩特 010031; 2内蒙古旱作农业重点实验室, 呼和浩特 010031; 3农业农村部武川农业环境科学观测试验站, 呼和浩特 011705; 4农业农村部内蒙古耕地保育科学观测试验站, 呼和浩特 011705)

  • 出版日期:2023-03-10 发布日期:2023-03-06

Effects of long-term fertilization on soil physicochemical and biological properties of chestnut calcareous soil in agro-pastoral ecotone.

GAO Riping1,2,3,4, ZHAO Peiyi1,2,3,4, LIU Xiaoyue1,2,3,4, ZHANG Jun1,2,3,4, LI Huanchun1,2,3,4, HUANG Jie1, JING Yupeng1,2,3,4*, DUAN Yu1,2,3,4*#br#

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  1. (1Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot 010031, China; 2Inner Mongolia Key Laboratory of Dryland Farming, Hohhot 010031, China; 3Wuchuan Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Hohhot 011705, China; 4Science Observing and Experimental Station of Arable Land Conservation in Inner Mongolia, Ministry of Agriculture and Rural Affairs, Hohhot 011705, China).

  • Online:2023-03-10 Published:2023-03-06

摘要: 探究干旱栗钙土土壤长期施肥的施肥效应,揭示不同施肥模式下土壤理化性质及微生物特性的演变特征,为内蒙古农牧交错地区农田合理培肥和科学评估施肥效果提供依据。依托内蒙古武川旱作试验站的长期轮作定位施肥试验(2004—2019年),分析了不同施肥处理对农牧交错带栗钙土耕层土壤理化性质和生物学特性的影响。结果表明:长期有机肥配施化肥和单施有机肥可显著降低土壤容重,增大土壤孔隙度,而不平衡施肥(如NP、NK、PK、N处理)和不施肥处理土壤容重有增加趋势;与不施肥处理相比,不同施肥方式土壤有机碳、全氮、碱解氮、有效磷和速效钾含量均有所提高,土壤养分均表现为有机肥配施化肥>有机肥施用>化肥平衡施用>化肥不平衡施用>不施肥;在土壤微生物方面,有机肥配施化肥土壤细菌数量显著提高108.36%~118.92%,真菌数量提高27.68%~50.46%,放线菌数量提高35.43%~40.25%;长期施用有机肥和平衡施用化肥能改善土壤结构,提高土壤养分和微生物数量,尤以有机肥与化肥两者配施联用效果最好。以合理氮、磷、钾多元素配比施用对农牧交错带干旱栗钙土土壤质量有明显改善,不平衡施肥土壤性状也有所改善,而长期不施肥土壤性状明显退化。


关键词: 长期施肥, 农牧交错带, 土壤性状, 土壤微生物

Abstract: This study aims to explore the effects of long-term fertilization in arid chestnut soil, to reveal the changes of soil physicochemical and microbial properties under different fertilization schemes. Results would provide basis for reasonable fertilization and scientific evaluation of fertilization effects in the agro-pastoral zone of Inner Mongolia. Based on a long-term rotation fertilization positioning experiment (2004-2019) at Wuchuan Dryland Experimental Station in Inner Mongolia, we examined the effects of different fertilization schemes on the topsoil physicochemical and biological properties of chestnut calcareous soil in the agro-pastoral zone. The results showed that long-term organic manure combined with chemical fertilizer (NPK+OM) and single organic manure (OM) applications significantly reduced soil bulk density and increased soil porosity, while unbalanced fertilization (such as NP, NK, PK, N) and no fertilization (CK) showed an increasing trend in soil bulk density. Compared with CK, the contents of soil organic carbon, total nitrogen, alkaline hydrolysis nitrogen, available phosphorus and available potassium were increased in other treatments. The magnitudes of improvement for soil nutrients were ranked as follows: organic manure combined with chemical fertilizer > organic manure > chemical fertilizer balanced application > chemical fertilizer unbalanced application > no fertilization. In terms of soil microorganisms, soil bacterial abundance increased by 108.36%-118.92%, fungal abundance increased by 27.68%-50.46%, actinomycetic abundance increased by 35.43%-40.25% in NPK+OM. Long-term application of organic manure and balanced application of chemical fertilizer improved soil structure, soil nutrients, and microorganism abundance. In particular, the combination of organic manure and chemical fertilizer is the most effective. The application of reasonable ratio of nitrogen, phosphorus and potassium significantly improved soil quality of arid chestnut soil in the agro-pastoral ecotone, unbalanced fertilization also improved soil properties, while no fertilization significantly degraded soil properties in the long term.


Key words: long-term fertilization, agro-pastoral zone, soil property, soil microorganisms.