Abstract Many studies have evidenced the negative effects of synthetic fertilizers toward the environment and also the crop products itself. Hence, the improvement of organic fertilizers is necessary to resolve this problem. Seaweeds or marine macroalgae are considered to be an excellent natural resource in different aspects of agricultural fields. Brown macroalgae Turbinaria murayana (TM) is often found in Indonesian coastal areas with high bioavailability throughout the year. This study evaluated the potentials of TM as biofertilizer in tomato plants (Lycopersicum esculentum Mill.). Evaluation of phytohormones present in TM crude extract was conducted with high performance liquid chromatography (HPLC). Macro and micronutrients available in TM crude extract were determined by atomic absorbance spectroscopy (AAS). A concentration of 4% TM crude extract was applied to tomato plants. The vegetative properties of the treated tomatoes were observed such as growth and yield. Current results evidenced the presence of growth-promoting factors (kinetin, gibberellin and ABA) and essential elements (N, P, K, Ca, Fe and Mn) in TM crude extract. Application of 4% TM extract to tomato plants significantly increased vegetative growth compared to untreated plants; plant height, leaf number and branch number, approximately 58.4%, 87.5% and 200%, respectively. Similar results were also found in the response of generative growth. Application of 4% liquid extract significantly improved flower and fruit number compared to control; 53.6% and 125%, respectively. These results suggest that TM crude extract is a potential source for developing organic fertilizers.

中文翻译：

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Lombok Turbinaria murayana 提取物中存在促进番茄植物生长和产量的生长促进因子的证据（Lycopersicum esculentum Mill。）

摘要 许多研究证明了合成肥料对环境和作物产品本身的负面影响。因此，有必要改进有机肥来解决这个问题。海藻或海洋大型藻类被认为是农业领域不同方面的极好自然资源。褐藻Turbinaria murayana (TM) 常出现在印度尼西亚沿海地区，全年生物利用度高。本研究评估了 TM 作为番茄植物 (Lycopersicum esculentum Mill.) 生物肥料的潜力。用高效液相色谱 (HPLC) 对 TM 粗提取物中存在的植物激素进行评估。TM 粗提物中可用的宏量和微量营养素通过原子吸收光谱 (AAS) 测定。将浓度为 4% 的 TM 粗提取物应用于番茄植物。观察处理番茄的营养特性，例如生长和产量。目前的结果证明，TM 粗提物中存在促生长因子（激动素、赤霉素和 ABA）和必需元素（N、P、K、Ca、Fe 和 Mn）。与未经处理的植物相比，将 4% TM 提取物应用于番茄植物显着增加了营养生长；株高、叶数和分枝数分别约为 58.4%、87.5% 和 200%。在生成性生长的反应中也发现了类似的结果。与对照相比，施用4%的液体提取物显着提高了花和果实的数量；分别为 53.6% 和 125%。这些结果表明 TM 粗提物是开发有机肥料的潜在来源。