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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan)
Pradani, Avi Qurvanda Putri
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Agriculture, Biological Sciences & Forestry Environmental Science

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AGROFORESTRY TO IMPROVE SOIL HEALTH: MICROBIAL BIOMASS NITROGEN (MBN) AS AN INDICATOR Pradani, Avi Qurvanda Putri; Nurfadilah; Sari, Rika Ratna; Danny Dwi Saputra; Hairiah, Kurniatun
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 2 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.2.13

Abstract

Conversion of forests into agricultural land is one of the environmental problems currently being faced, leading to various environmental challenges including the decline in soil health. One effort to improve land management and slow down land degradation is to plant various types of trees and intercrops through an agroforestry system. Agroforestry is considered a viable strategy to gradually create a conducive microclimate for soil biota that can improve the physical, chemical and biological properties of the soil. The biomass of microorganisms as quantified – Microbial Biomass Nitrogen (MBN) and Microbial Biomass Carbon (MBC) – has been proposed as sensitive indicator of soil change. This research aimed to understand how MBN responds to agroforestation of Imperata grasslands in Solok Regency, West Sumatra (Indonesia). Fields of eight land use types (in three replications each) were sampled in the Juli-August 2024 period. Plot characteristics such as canopy cover were measured, to compare with MBN and MBC for soil at a depth of 0-10 cm. The results showed statistically significant differences in MBN and MBC in various land uses,  that match differences in canopy cover and age of agroforestry systems. A 1% increase in canopy cover could increase soil MBN levels with 0.94 mg kg-1 (R2 = 0.90). The C:N ratio for microbial biomass varied in the 2-6 range, with the lowest values for intensively cropped land, and the highest for existing or recently converted Imperata grasslands.
RECLAMATION OF Imperata Grassland USING COFFEE BASED AGROFORESTRY: IMPACTS ON WATER INFILTRATION Ardiansyah, Nanda; Aldini, Leony Siska; Putra, Arega Dwi; Pradani, Avi Qurvanda Putri; Ishaq, Rizki Maulana; Saputra, Danny Dwi; Hairiah, Kurniatun
Jurnal Tanah dan Sumberdaya Lahan Vol. 12 No. 2 (2025)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2025.012.2.15

Abstract

The spread of Imperata cylindrica in agricultural lands is often associated with a decline in soil fertility, causing crops to be outcompeted by Imperata cylindrica. This study aimed to evaluate land cover, litter biomass, and soil infiltration rates in lands previously occupied by Imperata cylindrica that had been reclaimed with coffee-based agroforestry in Nagari Sirukam, Solok Regency, West Sumatra. The survey on volcanic soils was conducted in July-August 2024. The results showed that natural remnant forests (HT) had the highest canopy cover at 69%, while multistrata  agroforestry (AFMT) had a canopy cover of 37%. The highest standing litter was found in multistrata agroforestry (3.1 Mg ha-1), while at HT had 0.6 Mg ha-1 only. The highest infiltration rate was found in Imperata cylindrica grassland (AF0) with 0.072 cm sec-1, due to the dense rhizomes, while multistrata agroforestry had an infiltration rate that was 73% lower (averaged 0.02 cm sec-1). Although the infiltration rate was lower, agroforestry combined with fire control was effective in maintaining soil stability, reducing erosion, and improving soil quality sustainably, providing long-term benefits for soil and water conservation.
Co-Authors Aldini, Leony Siska Ardiansyah, Nanda Danny Dwi Saputra Kurniatun Hairiah Nurfadilah Putra, Arega Dwi Rizki Maulana Ishaq Saputra, Danny Dwi Sari, Rika Ratna