Soil erosion in the marginal upland of Inopacan, Leyte

Villamayor, Faustino; Asio, Victor; Lerios, Arjay; Asio, Luz; Sabijon, Jessie

doi:10.32945/atr39sa9.2017

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Furthermore, soil erosion was active in the A. aciculatus patch leading to the loss of topsoil rich in organic matter. Erosion rates of the same site were reported by Villamayor et al (2017) at 64.68 to 98.81 t ha -1 year -1 to the areas of no crop, while with natural vegetation strips, erosion rates of 52.60 to 61.34 t ha -1 year -1 were accounted. The lower erosion rates in areas of no crops with natural vegetation strips are due to canopy cover, preventing soil erosion and removal of OM-rich topsoil.…”

Section: Om Contentmentioning

confidence: 56%

Soil Physicochemical Characteristics and Spore Density of Indigenous Arbuscular Mycorrhizal Fungi (AMF) in Different Vegetation Patches of a Marginal Upland in Central Philippines

Olguera,

Asio,

Labides

2023

MJST

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To show the importance of plant-microbe association in stressed tropical landscapes, the study evaluated the physicochemical characteristics and indigenous arbuscular mycorrhizal fungi (AMF) spore density in selected vegetation patches of marginal upland soils in Central Philippines. Five quadrats were used in the study, namely Andropogon aciculatus (control plot), Imperata cylindrica, Chromolaena odorata, Melastoma malabathricum and mixed vegetation patch. Results showed that soils in the studied vegetation patches had different physicochemical characteristics and AMF spore density. Although all patches had clay soil texture and comparable water-holding capacity, mixed vegetation patch had moderate compaction (1.33 g cm-3) and higher porosity (50.31%) compared with the other patches, which had extreme compaction (1.37-1.65 g cm-3) and lower porosity (37.74-48.76%). In terms of chemical properties, soils in different patches had moderate (5.69) to strongly acidic pH (5.13), moderate organic matter (2.69-2.91%) levels, low P (2.67-3.94 ppm) content and above critical K levels (0.2-1.2 cmol+ kg-1). Results also revealed that C. odorata patch had the highest spore density count (11.33 spores 100 g-1), followed by mixed vegetation (9 spores 100 g-1), M. malabathricum (8.33 spores 100 g-1), and A. aciculatus patch having the lowest spore density count (4 spores 100 g-1). The significant spore density variability was attributed to the differences in soil’s physicochemical characteristics among the different vegetation patches and AMF host specificity. Spores detection, therefore, indicated AMF presence and helped the adaptation mechanism of the natural vegetation in this degraded upland.

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Section: Om Contentmentioning

confidence: 56%

Soil Physicochemical Characteristics and Spore Density of Indigenous Arbuscular Mycorrhizal Fungi (AMF) in Different Vegetation Patches of a Marginal Upland in Central Philippines

Olguera,

Asio,

Labides

2023

MJST

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Nitrogen application improved the growth and yield performance of sweetpotato (lpomoea batatas (L.) Lam.)

Relente

Asio

2020

ATR

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Nitrogen is one of the most critical nutrients affecting sweetpotato yield. This study was conducted to 1) evaluate the growth and yield response of sweetpotato NSIC SP 33 to different levels of N; and 2) determine the relationship between N level and root yield. A screenhouse experiment laid out in Completely Randomized Design (CRD) was carried out using five (5) N levels: 0,40, 80, 120 and 160kg ha-1, each replicated thrice.Thetotal amount of N (as urea) was applied twice, one-half at planting and the other half at six weeks after planting (6 WAP) along with a blanket application of solophos and muriate of potash at 40 and 60kg ha-1 P2O5and K2O. An alluvial Umingan sandy loam soil (lnceptisol) was used as medium. Levels of N significantly increased the leaf area, fresh herbage, total root yield, biomass, dry matter yield, shoot-root ratio, weight and number of marketable roots. Harvest index (HI) of plants applied with 40 and 80kg N ha-1 were comparable to those applied with 0 N. Increasing levels of N from 0 to 1 60kg ha-1 resulted in higher total crude protein (CP) and total N in the leaves. N uptake was higher in N-applied plants. Application of 40 and 80kg ha-1 N produced the highest root yield, above which root yield declined. Relationship between N level and root yield developed through regression analysis showed a quadratic function of Y=111.1794+1.2098x-0.00897x2 and R-square of 0.9904 which suggest that inherent soil N affected root development.

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Soil erosion in the marginal upland of Inopacan, Leyte

Cited by 2 publications

References 6 publications

Soil Physicochemical Characteristics and Spore Density of Indigenous Arbuscular Mycorrhizal Fungi (AMF) in Different Vegetation Patches of a Marginal Upland in Central Philippines

Soil Physicochemical Characteristics and Spore Density of Indigenous Arbuscular Mycorrhizal Fungi (AMF) in Different Vegetation Patches of a Marginal Upland in Central Philippines

Nitrogen application improved the growth and yield performance of sweetpotato (lpomoea batatas (L.) Lam.)

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