Effect of Cinnamon Leaf Compost on Selected Soil Properties in Cinnamon (Cinnamomum zeylanicum Blume) Growing Soils

Proceedings of International Forestry and Environment Symposium Pub Date : 2024-02-15 DOI:10.31357/fesympo.v27.7174

Anuradha M.D., Tharanga K.H.G.M., Dissanayake M.L.M.C., Madhurangi H.M.T.T.

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Abstract

Integrated nutrient-management programs incorporating organic and inorganic fertilizers have been suggested to increase crop yields and reduce adverse environmental impacts in intensive agriculture. This study was conducted to investigate the effect of long-term cinnamon leaf compost (CLC) application on some selected physical, biological and chemical soil properties and the horizontal and vertical distribution of some selected soil properties in cinnamon-growing soils. The study was conducted in the National Cinnamon Research and Training Center, Palolpitiya, from January to April 2022. The experimental design was Randomized Complete Block Design (RCBD) with six treatments (T1-Control, T2-Current recommendation (CR), T3-3/4 CR with 5 t/ha/yr CLC, T4-1/2 CR with 10 t/ha/yr CLC, T5-1/4 CR with 15 t/ha/yr CLC, T6-20 t/ha/yr CLC) and three replicates. Soil samples were collected considering three horizontal distances (15, 30 and 45 cm) and with three depths (10, 20 and 30 cm). Soil physical properties (aggregate stability, bulk density, soil moisture), chemical properties (soil organic carbon (SOC), pH, electrical conductivity (EC)), and biological properties (arbuscular mycorrhizal root colonization) were determined. Water stable aggregate (WSA), SOC, and soil pH were significantly affected by the treatments, and all the variables except EC were significantly affected by the soil depth (p<0.05). Soil pH was the only variable that was significantly affected by the horizontal distance (p<0.05). Only SOC and pH have shown a significant interaction effect among treatments and depth. The application of CLC (20 t/ha/yr) significantly increases the WSA and SOC. Arbuscular mycorrhizal fungi root colonization was increased with the incorporation of CLC. Continuous application of inorganic fertilizers (T2) caused soil compaction and acidification. WSA, soil pH, and SOC were significantly improved within the 0-10 cm soil depth. The best performances of WSA, pH, and EC were shown in 30-45 cm and SOC in 15–30 cm horizontal distance from the plant base and 0-10 cm soil depth with the application of 1/2 CR and 10 t/ha/yr CLC comparison to other fertilizer combinations. Keywords: Aggregates, Mycorrhizae, pH, Soil organic carbon

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肉桂叶堆肥对肉桂（Cinnamomum zeylanicum Blume）种植土壤中部分土壤性质的影响

有人建议采用有机肥和无机肥的综合养分管理方案，以提高集约农业的作物产量并减少对环境的不利影响。本研究旨在调查长期施用肉桂叶堆肥（CLC）对肉桂种植土壤中一些选定的物理、生物和化学土壤特性以及一些选定的土壤特性的水平和垂直分布的影响。研究于 2022 年 1 月至 4 月在帕洛尔皮蒂亚国家肉桂研究与培训中心进行。实验设计为随机完全区组设计（RCBD），共有六个处理（T1-对照组、T2-当前推荐组（CR）、T3-3/4 CR（5 吨/公顷/年 CLC）、T4-1/2 CR（10 吨/公顷/年 CLC）、T5-1/4 CR（15 吨/公顷/年 CLC）、T6-20 吨/公顷/年 CLC）和三个重复。采集土壤样本时考虑了三个水平距离（15、30 和 45 厘米）和三个深度（10、20 和 30 厘米）。测定了土壤物理特性（骨料稳定性、容重、土壤湿度）、化学特性（土壤有机碳 (SOC)、pH 值、电导率 (EC)）和生物特性（丛枝菌根定殖）。水稳定集料（WSA）、土壤有机碳（SOC）和土壤 pH 受处理的影响显著，除导电率外，其他变量均受土壤深度的影响显著（p<0.05）。土壤 pH 值是唯一受水平距离影响较大的变量（p<0.05）。只有 SOC 和 pH 在处理和深度之间有明显的交互效应。施用 CLC（20 吨/公顷/年）可明显增加 WSA 和 SOC。CLC 的施用增加了丛枝菌根真菌在根部的定殖。连续施用无机肥料（T2）会导致土壤板结和酸化。在 0-10 厘米的土壤深度内，WSA、土壤 pH 值和 SOC 都有明显改善。与其他肥料组合相比，施用1/2 CR和10吨/公顷/年CLC后，30-45厘米处的WSA、pH值和EC值表现最佳，距植株基部15-30厘米水平距离和0-10厘米土层深度的SOC表现最佳。关键词骨料菌根 pH 土壤有机碳

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Proceedings of International Forestry and Environment Symposium

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