Abstract

This study was conducted to assess the impact of some organic amendments on enzyme activities and soil organic carbon (SOC) content of a Calcaric Regosol. The organic amendments included poultry manure compost (CM), sugarcane (Saccharum officinarum) bagasse biomass (SBB), and its biochar (SBBC). Chemical soil properties and some enzyme activities were analyzed after 2, 4, 8, and 12 months (M₂, M₄, M₈, and M₁₂, respectively) of soil incubation. Five treatments including Control soil, SBB, SBBC, CM, and the mixture of SBBC + CM in the ratio of 1 : 1 were considered. There were three levels of organic amendments: L₁: 1.25%, L₂: 2.5%, and L₃: 5%. The results indicated a considerable increase in SOC content and enzyme activities following the addition of organic amendments to the soil. Both the SOC content and enzyme activities were impacted by the type of organic amendments, levels of input, and the duration of incubation (p < 0.001). Compared to the control (untreated soil), the activity of alkaline phosphatase significantly increased from 221.2 (CML₁M₂) to 1094% (SBBL₃M₁₂) and acid phosphatase activity varied from 108.2 (SBBCL₃M₂) to 1063% (SBBL₃M₁₂) in the treated soils. The CML₃M₁₂ treatment had the highest impact on β-glucosidase activity with a rise of 1256.5% in comparison with the control. Similarly, the SBBCL₃M₈ treatment led to the highest Invertase activity. Application of organic amendments would be considered as a guaranteed strategy of restoring and increasing SOC storage in calcareous sandy soils.

中文翻译：

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有机改良剂对石灰性砂质土壤中酶活性的影响

摘要

进行这项研究的目的是评估某些有机添加剂对石灰石基质的酶活性和土壤有机碳（SOC）含量的影响。有机修订包括家禽粪便堆肥（CM），甘蔗（Saccharum officinarum）蔗渣生物量（SBB）和其生物炭（SBBC）。在土壤培养2、4、8和12个月（分别为M ₂，M ₄，M ₈和M ₁₂）后分析化学土壤特性和一些酶活性。考虑了五种处理方法，包括对照土壤，SBB，SBBC，CM以及SBBC + CM比例为1：1的混合物。有机修正分为三个级别：L ₁：1.25％，L ₂：2.5％和L ₃：5％。结果表明，向土壤中添加有机改良剂后，SOC含量和酶活性显着增加。SOC含量和酶活性都受到有机修饰物类型，投入水平和孵育时间的影响（p < 0.001）。与对照（未处理的土壤）相比，碱性磷酸酶的活性从221.2（CML ₁ M ₂）显着增加到1094％（SBBL ₃ M ₁₂），酸性磷酸酶的活性从108.2（SBBCL ₃ M ₂）变化到1063％（SBBCL ₃ M ₂）。 SBBL ₃ M ₁₂）在处理过的土壤中。CML ₃ M ₁₂处理对β-葡萄糖苷酶活性的影响最大，与对照相比增加了1256.5％。同样，SBBCL ₃ M ₈处理导致最高的转化酶活性。有机改良剂的应用将被认为是恢复和增加钙质砂质土壤中SOC储存量的有保证策略。