Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on the loess plateau in China

Wang, Jun; Fu, Bojie; Yang, Qinli; Chen, Liding

doi:10.1006/jare.2000.0763

Cited by 230 publications

(123 citation statements)

References 40 publications

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“…In addition, higher OC and total N contents were recorded in the surface as compared to subsurface layers indicating strong correlation between them. However, their contents in the Depression pedon did not follow similar trend due to accumulation of contrasting material that add different materials from top parts through erosion in different years and water-logging, which might have affected decomposition and mineralization (Wang et al, 2000). Organic carbon and total nitrogen contents were positively correlated with available P and micronutrients, but negatively with clay (Table 6).…”

Section: Organic Carbon and Total Nitrogenmentioning

confidence: 99%

“…Different soil properties encountered along landscapes will affect the patterns of plant production, litter production and decomposition, which will definitely have effects on carbon (C) and nitrogen (N) contents of the soil. Soil properties such as clay content and its distribution with depth, sand content and pH have been shown to be highly correlated with landscape position (Wang et al, 2000) while organic matter has been shown to vary with slope position (Miller et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Characterization and Classification of Soils along the Toposequence of Kindo Koye Watershed in Southern Ethiopia

Mulugeta¹,

Sheleme²

2011

East African Journal of Sciences

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Abstract:In developing countries, where research funds are limited, the availability of pedogenic information and proper classification of soils will be of great importance. The soils of Kindo Koye watershed were fully characterized along east and west facing toposequences that formed a catena and classified according to the Soil Taxonomy and the WRB Legend to assess the impact of topography on soil development and characteristics. The morphological and physiochemical properties of seven pedons located at the upper, middle and lower slopes of the two toposequences and at the depression were studied. The study revealed the existence of three different soil orders along the toposequences in an area that was previously mapped as Eutric Nitosols. The pedons on the upper and middle slopes of both east and west-facing toposequences and the pedon on the east-facing lower slope were categorized under Ultisols, whereas the pedons on the foot slope west-facing and the depression were categorized under Inceptisols and Entisols, respectively. The Ultisols, Inceptisols and Entisols were further categorized as Acrisols, Cambisols and Fluvisols major groups according to the WRB Legend, respectively. This detail survey and classification of soils shows that topography has a great influence on soil development and characteristics.

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Section: Organic Carbon and Total Nitrogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization and Classification of Soils along the Toposequence of Kindo Koye Watershed in Southern Ethiopia

Mulugeta¹,

Sheleme²

2011

East African Journal of Sciences

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“…There were crops and apple trees on the intercropping land. Fertilizer management for crop included a preplant application of 50 kg/ha as anhydrous NH 3 and 2252 kg/ha of manure (green manure + animal manure) and 20 kg/ha P in middle growing season, but more N fertilizer and manure were added in the orchard (Wang et al, 2001a).…”

Section: Study Areamentioning

confidence: 99%

“…1). Based on the six categories of landscape position including upper interfluve, lower interfluve, shoulder, upper linear, lower linear and foot slope used by Brubaker et al (1993Brubaker et al ( , 1994, we divided the hillslope into three positions, upper slope, middle slope and foot slope (Wang et al, 2001a). The upper slope position, relative to upper interfluve and lower interfluve, is the uppermost portion of the hillslope.…”

Section: Soil Sampling and Measurementsmentioning

confidence: 99%

Analysis on soil nutrient characteristics for sustainable land use in Danangou catchment of the Loess Plateau, China

Wang

Yang

et al. 2003

CATENA

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Understanding of the characteristics of soil organic matter (SOM) and soil nutrients at the field and catchment scale is important for refining agricultural management practices and for improving sustainable land use. In order to analyze on SOM and nutrient differences among different land use types and their relationships between land use, landscape position and slope aspect, 94 sampling sites including 7 land uses were selected along 6 transects in the Danangou catchment with an area of 3.5 km 2 on the Loess Plateau of China. Significant differences in SOM, total N (TN), available N (AN) and available P (AP) among these land uses were found. Higher values in SOM, TN and AN were measured in soils from woodland and grassland, but lower values in the soils from fallow land and cropland. Compare SOM and TN with cropland, intercropping land had high contents. The adjusted R 2 values of regression models for SOM and nutrients with land use, landscape position and slope aspect ranged from 0.501 (SOM) to 0.134 (AP). A comparison between average predicted and measured values for SOM and each soil nutrient revealed that the predicted values in TP and AN for each land use, in SOM and TN except for fallow land and in AP except for intercropping land, shrub land and woodland, fell with in a 95% confidence interval about the measured values. The simplified predicted models of soil nutrients combined with the key value of SOM for soil quality can serve to improve agricultural practices and to provide useful information on sustainable land use. Improvement in SOM and nutrients would be expected from more C inputs including manure and crop residues and alternative cultivation practices such as developing intercropping system, building terrace for soil and water conservation, return the cropland with SOM content less than a key value of 0.44% to the grassland and woodland on the hilly areas similar to the Loess Plateau of China. the same time, it is recommended that nitrogen fertilization addition could be decreased in the foot slope and increased on the upper slope. D

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“…Due to long-term human activity, natural vegetation has been destroyed. Land use types are cropland, fallow land, wasteland, shrub land, orchard, intercropping land and woodland consisting of mosaic patterns Wang et al, 2001a). Crops are mainly potatoes (Solanum tuberosum), beans (Phaseolus valgaris), maize (Zea mays L.) and millet (Panicum miliaceum) (Wu et al, 2003).…”

Section: Description Of Study Areamentioning

confidence: 99%

Spatiotemporal prediction of soil moisture content using multiple-linear regression in a small catchment of the Loess Plateau, China

Yang

Wang

et al. 2003

CATENA

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Three basic multiple-linear regression models with different sets of more readily observed environmental variables (land use, topographic and meteorological factors) were developed for the prediction of soil moisture content in space and time. The model performances were evaluated in the Danangou catchment (3.5 km 2 ) on the Loess Plateau, China, with soil moisture content measurements. The soil moisture content measurements were performed biweekly at five depths in the soil profile (0 -5, 10 -15, 20 -25, 40 -45 and 70 -75 cm) from May to October 1998 and from May to September 1999, using a Delta-T theta probe. It was indicated that the regression models could describe the relationships of soil moisture content with environmental attributes. It was found that the spatiotemporal-SM model showed the best goodness of fit since it explained the greatest fraction of soil moisture variation in both space and time, and the predicted mean, standard deviation, minimum and maximum soil moisture were closest to the observed values. This model was also either the most precise or the most economical in prediction of soil moisture content in space and time since it gives the lowest values in mean absolute error of prediction (MAE) and Akaike information criterion (AIC). There is little difference in performance and cost-benefit between the spatial-GM model and landuse-GM model. The superior robustness of the spatiotemporal-SM model over the other two models is most significant in the prediction of soil moisture content at 0 -5 cm, and decreases with increasing soil depth. D

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Soil nutrients in relation to land use and landscape position in the semi-arid small catchment on the loess plateau in China

Cited by 230 publications

References 40 publications

Characterization and Classification of Soils along the Toposequence of Kindo Koye Watershed in Southern Ethiopia

Characterization and Classification of Soils along the Toposequence of Kindo Koye Watershed in Southern Ethiopia

Analysis on soil nutrient characteristics for sustainable land use in Danangou catchment of the Loess Plateau, China

Spatiotemporal prediction of soil moisture content using multiple-linear regression in a small catchment of the Loess Plateau, China

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