ABSTRACT

Physicochemical characterization and a 300-day soil incubation was conducted to study the effect of a thermochemical organic fertilizer (TOF) produced from biowaste through rapid thermochemical processing technology on soil properties and nutrient release pattern at the Kerala Agricultural University, India. A field experiment to study the effect of TOF on the growth and yield of banana (Nendran) was conducted. The physicochemical properties of TOF were conforming to prescribed quality standards. The TOF imparted moderation of acidity, lower soluble salts and a steady and constant release pattern of organic carbon on incubation. Mineralized nitrogen dynamics was superior in TOF combined with Plant Growth Promoting Rhizobacteria, characterized by a 120-day cycle of net nitrogen mineralization on 10 days and a net immobilization on 20 days. Highest P mineralization was recorded at 150 days with a phase of total immobilization from 180 to 240 days. Mineralization and immobilization up to 60 days, marked by a steady release of potassium followed by a progressive mineralization up to 240 days was evident. The TOF based treatments proved to be superior in plant height, number of leaves, pseudostem girth, bunch yield and dry matter production in banana as compared to farmyard manure – based treatments.

摘要

印度喀拉拉邦农业大学进行了物理化学表征和 300 天的土壤培养，以研究通过快速热化学处理技术从生物废物中生产的热化学有机肥 (TOF) 对土壤特性和养分释放模式的影响。进行了田间试验以研究 TOF 对香蕉 (Nendran) 生长和产量的影响。TOF的理化性质符合规定的质量标准。TOF 使酸度适中，可溶盐含量较低，并且在孵化时有机碳的释放模式稳定且恒定。TOF 结合促进植物生长的根际细菌的矿化氮动力学是优越的，其特征是 120 天周期的 10 天净氮矿化和 20 天净固定化。最高的 P 矿化记录在 150 天，总固定阶段为 180 至 240 天。长达 60 天的矿化和固定化，以钾的稳定释放为标志，随后是长达 240 天的明显矿化。与基于农家肥的处理相比，基于 TOF 的处理被证明在香蕉的株高、叶数、假茎周长、束产量和干物质产量方面具有优势。