Azolla pinnata ammendment and P-solubilizing bacteria inoculation for improving Inceptisols fertility and rice (Oryza sativa L.) yield production

Pujawati Suryatmana, Wildan Maulana Ridho, Betty Natalie Fitriatin, Mieke Rochimi Setiawati
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Abstract

Continuous and long-term use of chemical fertilizers in lowland rice fields can have negative impacts on the environment, causing harm to aquatic life and a decrease in soil health. Applying Azolla pinnata and inoculating phosphate solubilizing bacteria (PSB) in organic farming is an appropriate strategy to increase soil nutrients and lowland rice production. Azolla pinnata plays a role in increasing N nutrients, while phosphate solubilizing bacteria (PSB) increase available phosphate in the soil. This study aims to assess the effectiveness of varying doses of Azolla pinnata and PSB inoculant in increasing soil available P, plant-P concentration, plant hegh, productive tiller, and rice yield. The experimental design used a Factorial Randomized Block Design of two factors in three replications. The first factor was Azolla pinnata application (0 ton ha-1; 10 ton ha-1; 20 ton ha-1; 30 ton ha-1), and the second factor was PSB inoculation (0 kg ha-1; 12.5 kg ha -1; 25 kg ha-1). The experimental results showed that the Azolla pinnata application at a dose of 10 t ha-1 with inoculation of 12.5 kg ha-1 PSB significantly increased the highest soil available P by 48.3 ppm. The application of Azolla pinnata 30 t ha-1 significantly increased the P content of plants—0.26 mg g-1. Azolla pinnata 30 t ha-1 application and PSB inoculation produced significantly the highest productive tillers of rice plants, 38 plants pot-1. Azolla pinnata 10 tons ha-1 application with BPF inoculant 12.5 kg ha-1 significantly increased the highest grain yield, namely 81.47 g pot.-1
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用羽衣杜鹃和钾溶解菌接种改善渍土肥力和水稻(Oryza sativa L.)产量
在低地稻田中长期持续使用化肥会对环境造成负面影响,对水生生物造成危害,并降低土壤健康水平。在有机耕作中施用羽衣杜鹃和接种磷酸盐溶解菌(PSB)是增加土壤养分和低地水稻产量的适当策略。羽衣杜鹃在增加氮养分方面发挥作用,而磷酸盐溶解菌(PSB)则能增加土壤中的可用磷酸盐。本研究旨在评估不同剂量的羽衣杜鹃和 PSB 接种剂在增加土壤可利用磷、植物磷浓度、植株高度、生产性分蘖和水稻产量方面的效果。实验设计采用因子随机区组设计,两个因子三个重复。第一个因素是施用杜鹃花(0 吨/公顷-1;10 吨/公顷-1;20 吨/公顷-1;30 吨/公顷-1),第二个因素是接种 PSB(0 千克/公顷-1;12.5 千克/公顷-1;25 千克/公顷-1)。实验结果表明,施用 10 吨/公顷剂量的羽衣杜鹃并接种 12.5 千克/公顷-1 的 PSB 后,土壤中的最高可利用钾显著增加了 48.3 ppm。施用 30 t ha-1 的羽衣杜鹃能明显增加植物的钾含量-0.26 mg g-1。施用 30 吨羽衣杜鹃(Azolla pinnata)公顷-1 和接种 PSB 能明显增加水稻植株的分蘖产量,达到 38 株盆-1。施用 10 吨羽衣甘蓝和 12.5 千克/公顷的 BPF 接种剂可明显提高最高的谷物产量,即 81.47 克/盆-1。
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