中国农业科技导报 ›› 2024, Vol. 26 ›› Issue (2): 153-161.DOI: 10.13304/j.nykjdb.2022.0549

• 生物制造 资源生态 • 上一篇    

长期施用有机肥对松嫩平原盐碱土壤盐碱性质和化学计量比的影响

翟车宇(), 骆静梅, 刘昌杰, 张娟, 孟庆峰()   

  1. 东北农业大学资源与环境学院,哈尔滨 150030
  • 收稿日期:2022-07-04 接受日期:2022-10-26 出版日期:2024-02-15 发布日期:2024-02-04
  • 通讯作者: 孟庆峰
  • 作者简介:翟车宇 E-mail:623532298@139.com
  • 基金资助:
    国家自然科学基金项目(42177320)

Effects of Long-term Manure Fertilizer on Saline-sodic Properties and Stoichiometric Ratio of Saline-sodic Soil in Songnen Plain

Cheyu ZHAI(), Jingmei LUO, Changjie LIU, Juan ZHANG, Qingfeng MENG()   

  1. College of Resources and Environment,Northeast Agricultural University,Harbin 150030,China
  • Received:2022-07-04 Accepted:2022-10-26 Online:2024-02-15 Published:2024-02-04
  • Contact: Qingfeng MENG

摘要:

盐碱土盐碱化程度高、养分有效性低,施加有机肥可以促进土壤盐分淋洗,降低土壤盐碱化程度,增加养分含量和土壤碳、氮、磷的供应能力。根据土壤施加腐熟牛粪的年限,设置施加腐熟牛粪21(Y21)、18(Y18)、15年(Y15)和未施加腐熟牛粪(CK)共4个处理,采集各处理0—20和20—40 cm土层的土壤样品,分析土壤盐碱性质和养分含量。结果表明,0—20和20—40 cm土层Y21、Y18、Y15处理有机碳(soil organic carbon, SOC)、全氮(total-N, TN)和全磷(total-P,TP)含量显著高于CK;土壤水溶性盐离子、pH、电导率(electrical conductance,EC)、钠吸附比(sodium adsorption ratio, SAR)和碱化度(exchangeable sodium percentage,ESP)较CK显著降低。在0—20 和20—40 cm土层,Y21、Y18、Y15处理碳氮比(C/N)较CK显著降低;与CK相比,Y21与Y15处理0—20 cm土层氮磷比(N/P)由0.95显著增加至1.84和2.11,20—40 cm土层N/P由1.15显著增加至2.25和2.44;土壤碳磷比(C/P)在0—20 cm土层规律不明显,在20—40 cm土层Y21、Y18、Y15处理与CK相比差异不显著。多元线性回归模型显示,C/N受SOC、TN和ESP影响,N/P和C/P主要受TP和TN影响。综上所述,松嫩平原西部草甸碱土施加有机肥后土壤盐碱程度降低,SOC、TN、TP含量和N/P增加,C/N降低,且施加有机肥改良15年的土壤供碳、供氮潜力达到最大。

关键词: 草甸碱土, 腐熟牛粪, 碱化度, 生态化学计量比

Abstract:

Saline-sodic soil has a high degree of salinization and poor nutrient availability, the application of organic fertilizer can promote soil salt leach, reduce the degree of soil salinization, and increase the nutrient content and the supply capacity of soil carbon, nitrogen and phosphorus. According to the years of applying cattle manure in the soil, 4 treatments were conducted with different application years of cattle manure for 21 (Y21), 18(Y18), 15(Y15) and no application of cattle manure (CK). Soil samples in each treatment were collected from 0 to 20 and 20 to 40 cm soil layers to explore the soil saline properties and nutrient content. The results showed that soil organic carbon (SOC), total-N (TN) and total-P (TP) contents of Y21,Y18,Y15 treatments were significantly increased than CK, but soil water-soluble salt ions, pH, electrical conductance (EC), sodium adsorption ratio (SAR) and exchangeable sodium percentage (ESP) were significantly decreased compared to CK at both 0 to 20 and 20 to 40 cm soil layers. At 0 to 20 and 20 to 40 cm soil layers, carbon nitrogen ratios(C/N) of Y21,Y18,Y15 treatments significantly reduced compared to CK. At 0 to 20 cm soil layer, nitrogen phosphorus ratios(N/P) of Y21, Y15 treatments significantly increased from 0.95 to 1.84 and 2.11. At the 20 to 40 cm soil layers, N/P of Y21, Y15 treatments significantly increased from 1.15 to 2.25 and 2.44. The carbon phosphorus ratio(C/P) of each treatment had no similar regularization compared to CK at 0 to 20 cm soil layer and no significant difference was observed at 20 to 40 cm soil layer. The multivariable linear regression model showed that C/N was affected by SOC, TN, and ESP, while N/P and C/P were mainly regulated by TP and TN. In conclusion, the long-term application of manure fertilizer could reduce the degree of soil salinity and C/N, increase the contents of SOC, TN, TP and N/P. The nutrient supply of soil reached its maximum at 15 years of manure fertilizer application.

Key words: solonetz, composted cattle manure, exchangeable sodium percentage, ecological stoichiometric ratio

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