Combined Application of Various Sources of Organic Fertilizers With Biofertilizers for Improvement Potato Productivity and Soil Fertility Status

Abstract

A FIELD experiments were carried out during two successive seasons 2019 and 2020 in a private farm at Belqas district, Al-Daqahlia Governorate, Egypt to assay the effect of various sources of organic fertilizers (farmyard manure, compost, chicken manure and spent coffee ground) added either solely or combination with biofertilizers (N-fixers and PKdissolving bacteria) on the growth performance and productivity of potato plants. Results showed that the soil amended with chicken manure (24.7m 3 ha -1 ) and inoculated by dual biofertilizers i.e. Paenibacillus polymyxa as nitrogen fixing bacteria and Enterobacter cloacae as phosphate and potassium solubilizing bacteria thatintroduced as talc-based formulation containing mixed strains,significantly enhanced remaining nutrientsin the soil post-harvest; Moreover, densities of bacterial population at 90 days'-time interval significantly increased. Also, the highest vegetative growth, yield attributes and tuber quality were recorded for the same treatment. On other hand, this treatment recorded the lowest nitrate content for both seasons. It is worth mentioning that soil amended with spent coffee grounds (27.17m 3 ha -1 ) with bacterial inoculation has a positive effect onimproving soil fertility and potato productivity.

Respons pertumbuhan bibit kopi arabika dan sifat kimia media tanam terhadap pemberian pupuk hayati dan pupuk organik

“…Selain itu pupuk organik juga meningkatkan daya retensi air, memperbaiki kemantapan agregat, porositas, memperbaiki kesehatan tanah, menstimulasi pertumbuhan dan mengubah struktur mikroba tanah, serta meningkatkan aktivitas enzim sehingga berdampak terhadap perbaikan sifat fisik dan kimia tanah (Pujiyanto, 2011;Lazcano et al, 2012;Zulkarnain et al, 2013;Suarmaprasetya & Soemarno, 2021;Gustian et al, 2022). Peningkatan sifat kimia dan fisik juga akan mendorong perkembangbiakan mikroorganisme, meningkatkan populasi mikroba dan merangsang aktivitas enzim mikroba (El-Saied & Raswan, 2021). Hasil penelitian ini membuktikan bahwa pemberian pupuk organik meningkatkan pertumbuhan bibit kopi dan meningkatkan kadar hara tanah sehingga berpotensi dapat mengurangi kebutuhan pupuk anorganik.…”