Some Soil Erosion Effects on Forest Soil Productivity

2015 ◽  
pp. 53-66 ◽  
Author(s):  
G. O. Klock
Keyword(s):  
Soil Erosion ◽  
Forest Soil ◽  
Soil Productivity

scholarly journals Growth and Nutrient Acclimation of Evergreen Oak Seedlings Infected with Boletus reticulatus in Infertile Colluvial Soil in Warm Temperate Monsoon Asia: Evaluation of Early Growth

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 870
Author(s):  
Masazumi Kayama
Keyword(s):  
Soil Erosion ◽  
Forest Soil ◽  
Nutrient Uptake ◽  
Woody Species ◽  
Nutrient Content ◽  
Dry Mass ◽  
Spore Suspension ◽  
Quercus Species ◽  
Colluvial Soil ◽  
Oak Seedlings

Soil erosion after harvesting of forest plantations can create infertile colluvial soil, therefore, seedlings used for site reforestation should be equipped against nutrient-poor edaphic conditions. The oak genus is a suitable candidate for such reforestation efforts. Oak is an ectomycorrhizal (ECM) tree genus known to grow under infertile environments. In this study, the initial stage of tree growth in three species of oak seedlings inoculated with a spore suspension of ECM fungus was monitored to evaluate the acceleration of seedling growth and nutrient uptake. I selected Quercus acuta Thunb., Quercus glauca Thunb., and Quercus salicina Blume, as these are common, evergreen, broad-leaved woody species commonly found in Southwestern Japan. The seedlings were inoculated with Boletus reticulatus and planted in infertile colluvial soils collected from a site that had undergone soil erosion. I also compared the ecophysiological characteristics of the potted seedlings planted in colluvial soil and normal forest soil. After six months of cultivation, Q. glauca with the ECM showed the highest growth rate in the fertile forest soil and had leaves with a higher nutrient content. In contrast, root dry mass increased slightly in Q. acuta and Q. salicina planted in colluvial soil. In all species, the seedling’s ECM colonization rate in colluvial soil was lower than that in forest soil, yet the increase in nutrient uptake in the former was not obvious. The contents of K and Ca in the roots of Q. acuta and Q. salicina increased with B. reticulatus infection. I concluded that the inoculation with a B. reticulatus spore suspension effectively accelerated the growths in all three Quercus species. Q. glauca favored a fertile environment, and Q. acuta and Q. salicina suitably acclimated to both soil types. Thus, these species were selected as potential future candidates for reforestation in such eroded sites.

Quantifying soil erosion effects on soil productivity in the dry-hot valley, southwestern China

2016 ◽  
Vol 75 (16) ◽  
Author(s):  
Xingwu Duan ◽  
Bing Liu ◽  
Zhijia Gu ◽  
Li Rong ◽  
Detai Feng
Keyword(s):  
Soil Erosion ◽  
Southwestern China ◽  
Soil Productivity

scholarly journals Kinerja dan Perspektif Usahatani Konservasi Alley Cropping di Indonesia

2016 ◽  
Vol 15 (1-2) ◽  
pp. 1
Author(s):  
Sri Hery Susilowati ◽  
Gelar Satya Budhi ◽  
I Wayan Rusastra
Keyword(s):  
Soil Erosion ◽  
Alley Cropping ◽  
Cropping Systems ◽  
Soil Conditions ◽  
Small Scale ◽  
Soil Productivity ◽  
Soil Erosion Rate ◽  
Conservation Technology ◽  
Limited Degree ◽  
Unit Output

Alley cropping as a soil conservation technology owning certain advantages over terracing, particularly in that : a) costs are lower, b) soil productivity can be maintained, and c) it may be applied on all soil conditions. A disadvantage of alley cropping relates to the time taken for soil erosion control to become effective. However, over the longer time period, soil conversation control through alley cropping technology is more economical than that for terracing. The reviewed studies indicate that flemingia congesta is the most effective soil erosion controlling leguminous shrub,of those studied. Alley cropping is effective in maintaining land productivity. The synergic effect of soil productivity increase and soil erosion rate reduction. In some research,alley cropping systems have been shown to significantaly reduce farming costs per unit output,due to a decrease in manday (labour) use and other input reductions. In implementing alley cropping, land-holding status is one determining fector in farmers' willingness to apply the technology. That is why efforts to disseminate soil cinversation technology have often used some incentive in terms of land ownership rights for farmers. It is worthwhile to develop these incentives further, so that there is a legal certainty on cultivated land. Although alley cropping technology has currently been applied and adopted by farmers to a limited degree, there are still four main assues obstructing farmers' adoption of the tecnolog: a) small scale land-holding; b) limited capital ; c) production input availability; and d) lack of technology information

scholarly journals A review of the (Revised) Universal Soil Loss Equation ((R)USLE): with a view to increasing its global applicability and improving soil loss estimates

2018 ◽  
Vol 22 (11) ◽  
pp. 6059-6086 ◽  
Author(s):  
Rubianca Benavidez ◽  
Bethanna Jackson ◽  
Deborah Maxwell ◽  
Kevin Norton
Keyword(s):  
Soil Erosion ◽  
Soil Loss ◽  
Gully Erosion ◽  
Data Availability ◽  
Universal Soil Loss Equation ◽  
Soil Productivity ◽  
Temporal Scales ◽  
Erosion Models ◽  
The World ◽  
Soil Loss Equation

Abstract. Soil erosion is a major problem around the world because of its effects on soil productivity, nutrient loss, siltation in water bodies, and degradation of water quality. By understanding the driving forces behind soil erosion, we can more easily identify erosion-prone areas within a landscape to address the problem strategically. Soil erosion models have been used to assist in this task. One of the most commonly used soil erosion models is the Universal Soil Loss Equation (USLE) and its family of models: the Revised Universal Soil Loss Equation (RUSLE), the Revised Universal Soil Loss Equation version 2 (RUSLE2), and the Modified Universal Soil Loss Equation (MUSLE). This paper reviews the different sub-factors of USLE and RUSLE, and analyses how different studies around the world have adapted the equations to local conditions. We compiled these studies and equations to serve as a reference for other researchers working with (R)USLE and related approaches. Within each sub-factor section, the strengths and limitations of the different equations are discussed, and guidance is given as to which equations may be most appropriate for particular climate types, spatial resolution, and temporal scale. We investigate some of the limitations of existing (R)USLE formulations, such as uncertainty issues given the simple empirical nature of the model and many of its sub-components; uncertainty issues around data availability; and its inability to account for soil loss from gully erosion, mass wasting events, or predicting potential sediment yields to streams. Recommendations on how to overcome some of the uncertainties associated with the model are given. Several key future directions to refine it are outlined: e.g. incorporating soil loss from other types of soil erosion, estimating soil loss at sub-annual temporal scales, and compiling consistent units for the future literature to reduce confusion and errors caused by mismatching units. The potential of combining (R)USLE with the Compound Topographic Index (CTI) and sediment delivery ratio (SDR) to account for gully erosion and sediment yield to streams respectively is discussed. Overall, the aim of this paper is to review the (R)USLE and its sub-factors, and to elucidate the caveats, limitations, and recommendations for future applications of these soil erosion models. We hope these recommendations will help researchers more robustly apply (R)USLE in a range of geoclimatic regions with varying data availability, and modelling different land cover scenarios at finer spatial and temporal scales (e.g. at the field scale with different cropping options).

scholarly journals A review of radiometric analysis on soil erosion and deposition studies in Africa

2018 ◽  
Vol 45 (1) ◽  
pp. 10-19 ◽  
Author(s):  
Caroline W. Maina ◽  
Joseph K. Sang ◽  
Benedict M. Mutua ◽  
James M. Raude
Keyword(s):  
Soil Erosion ◽  
Storage Capacity ◽  
Sediment Cores ◽  
Sustainable Use ◽  
Soil Productivity ◽  
Reservoir Sedimentation ◽  
Erosion And Deposition ◽  
Reservoir Storage ◽  
Fallout Radionuclides ◽  
Capacity Loss

Abstract Soil erosion is one of the main soil degradation phenomena that threaten sustainable use of soil productivity thus affecting food security. In addition, it leads to reservoir storage capacity loss because of sedimentation. This not only affects water quantity but also water quality. Worldwide, annual loss in reservoir storage capacity due to sedimentation is 0.5 to 1%. Similarly, about 27% of land in Africa is largely degraded by erosion. As a result, there is need to minimize soil erosion and deposition through site specific estimation of soil erosion and deposition rates in the reservoirs. To achieve this, Fallout RadioNuclides (FRNs) are some of the methods in use. The most common radionuclides include; 137Cs, 210Pb and 7Be. Only few countries in Africa have exploited these FRNs. In these countries, 137Cs has been largely exploited but in some regions, it has been reported to be below minimum detection limit. Using 137Cs and 210Pb, maximum reference inventory in Africa is found to be 1450 and 2602 Bq/m2, respectively. However, there is minimal application of 7Be within the continent. Also, very little has been done in Africa to assess chronology and sedimentation rates of reservoirs using FRNs measured from sediment cores. In conclusion, a gap still exists on FRNs application in Africa in assessing soil erosion, deposition and reservoir sedimentation.

Sign in / Sign up

Export Citation Format

Share Document