Impact of Organic and Chemical Fertilizer Combinations on Growth, Yield, and Soil Carbon in in Oil Palm Cultivation at Talgaswella Estate, Sri Lanka

Tropical Agricultural Research and Extension Pub Date : 2024-03-29 DOI:10.4038/tare.v27i1.5681

D. Bulugahapitiya, I. R. Palihakkara, A. Blasuriya

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Abstract

The success of oil palm cultivation hinges on factors such as planting material quality, management practices, and the availability of essential macro and micro-nutrients. Insufficient nutrient supply adversely impacts both vegetative growth and the ultimate yield in terms of quantity and quality. To address this issue, an experiment was conducted at Talgaswella Estate, belonging to Elpitiya Plantations PLC., situated in the Low Country Wet Zone (LCWZ) of Sri Lanka. The objective was to enhance the productivity and profitability of marginal oil palm lands. A ten-year-old oil palm field was chosen as the experimental site, employing a Randomized Complete Block Design (RCBD) with eleven treatments and three replicates, including an absolute control. Each trial plot consisted of six palm trees, totaling 198 trees in the experiment. Treatments involved varying combinations of Empty Fruit Bunches (EFB), Palm Oil Mill Effluent (POME), and Poultry Litter (PL), with and without chemical fertilizer. Soil, plant, and yield parameters were measured, and the data were analyzed using the Minitab statistical tool. After three years, results indicated that 100% organic fertilizer-received plots (T11) and 100% chemical fertilizer-treated plots (T2) exhibited significant increases in average fresh fruit bunch weight (22.81 Kg and 21.82 Kg), soil organic carbon percentage (3.00 and 2.23), and leaf chlorophyll content (78.79 and 75.07) of the 17th frond compared to T11 and T2 treated plots. Intermediate results were observed in the remaining fertilizer combined plots (T3, T4, T5, T6, T7, T8, T9, T10). The findings suggest that the use of organic fertilizer in marginal oil palm lands not only improves crop and soil factors but also contributes to environmental sustainability through the recycling of oil palm waste products. It is recommended to periodically apply organic fertilizer, especially on marginal oil palm lands, to enhance overall crop productivity and land sustainability.

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有机肥和化肥组合对斯里兰卡塔尔加斯韦拉油棕种植园的生长、产量和土壤碳含量的影响

油棕种植的成功与否取决于种植材料的质量、管理方法以及必需的宏量和微量营养元素的供应等因素。养分供应不足会对植物生长和最终产量的数量和质量产生不利影响。为解决这一问题，我们在斯里兰卡低地湿润区（LCWZ）的埃尔皮提亚种植园股份公司（Elpitiya Plantations PLC.目的是提高边缘油棕地的生产力和盈利能力。试验选择了一块有十年树龄的油棕地作为试验场地，采用随机整块设计（RCBD），共有 11 个处理和 3 个重复，包括一个绝对对照。每个试验小区由 6 棵棕榈树组成，共 198 棵。处理包括空果穗（EFB）、棕榈油厂废水（POME）和家禽粪便（PL）的不同组合，施用或不施用化肥。对土壤、植物和产量参数进行了测量，并使用 Minitab 统计工具对数据进行了分析。三年后，结果表明，与施用 T11 和 T2 的地块相比，施用 100%有机肥的地块（T11）和施用 100%化肥的地块（T2）的平均鲜果串重（22.81 千克和 21.82 千克）、土壤有机碳百分比（3.00 和 2.23）以及第 17 个果穗的叶绿素含量（78.79 和 75.07）均有显著增加。其余肥料组合地块（T3、T4、T5、T6、T7、T8、T9、T10）的结果介于两者之间。研究结果表明，在贫瘠的油棕地里施用有机肥不仅能改善作物和土壤条件，还能通过回收利用油棕废料促进环境的可持续发展。建议定期施用有机肥，特别是在贫瘠的油棕地，以提高整体作物产量和土地的可持续性。

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Tropical Agricultural Research and Extension

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