Characteristics and Stocks of Soil Nutrient under Various  Land Use Types in a Super Wet Tropical Rain Forest Padang, West Sumatra

In order to clarify the characteristics and stocks of soil nutrient under various land use types in a super wet tropical rain forest in Padang, West Sumatera. We investigated the nutrient characteristics of the several samples of soils under different land use such as cacao plantation (CP), cinnamon plantation (CMP), mixed garden (MG), and primary forest (PF) in Gadut Mountain, Padang, West Sumatra. The soil nutrient characteristics varied among the different land use types. The range of nutrient characteristics under four land use type were 4.60 – 7.01% and 0.4 – 0.60 % for total carbon and total nitrogen and were 9.80 – 24.59, 0.68 – 2.07 and 0.30 – 0.8 mol (+) kg-1 for Ca, Mg and K, respectively. The highest content of soil nutrient status was found under MG, while the lowest soil nutrient status found at PF. This result indicated that the MG with various vegetation types might contribute in enriching the organic matter in soil. The soil nutrient content such as TN, exchangeable Ca, Mg and K tended to decrease with soil depth of each land use type. However, the sodium (Na) content in soil tended to increase within the soil depth. These were presumably due to evaporation of Na at surface soil within the study area was low. These study results showed that spatially the nutrient properties of soil were closely related to the land use type and management practices. It was suggested that the nutrient characteristics of soils under various land use types in a super wet tropical rain forest region, in Gadut Mountain, Padang West Sumatra were significantly affected by the land use types and land coverage.

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EVALUASI TERHADAP PERUBAHAN STATUS BEBERAPA HARA TANAH SETELAH 10 TAHUN DI BUKIT GAJABUIH PADANG

Jurnal Solum ◽

10.25077/js.5.1.23-42.2008 ◽

2008 ◽

Vol 5 (1) ◽

pp. 23

Author(s):

Hermansah Hermansah ◽

Juniarti Juniarti ◽

Utami Maya Pribadi

Keyword(s):

Soil Nutrients ◽

Rain Forest ◽

Tropical Rain Forest ◽

Soil Nutrient ◽

Nutrient Status ◽

The Other ◽

Experimental Plot ◽

Soil Nutrient Status ◽

P Content ◽

The Relationship

This experiment is about the evaluation of characteristic alteration of soil nutrients after ten years at tropical rain forest Bukit Gajabuih Gunung Gadut Padang. This experiment was conducted from November 2006 - April 2007. This experiment is arranged based on anova design with three treatments which was based on three great groups of land ( oxic-dystroudept (eutriccc, aquic), oxic-dystroudept (xanthic), oxic-typic-dystroudept (xanthic)). The purpose of this experiment was to study the alteration of soil fertility characteristics (K, Ca, Mg, Na, P and C/N) in ten years period (1995-2005) in tropical rain forest at Bukit Gajabuih Padang, to observe vegetation variety alteration, and the relationship with the land fertility characteristics. From the experiment was found that nutrient status of the soils altered after ten years (*1995-2005). Available P content increased about 77%, exchangeable Na and K increased 86,04% and 53.65%, respectively. On the other hand, exchangeable Mg and Ca decreased 3,05% and 65,88%, respectively. Land C/N ratio decreased about 21,39%. The experimental plot had low soil pH.Key Words: tropical rain forest, soil nutrient status

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PENCUCIAN BAHAN ORGANIK TANAH PADA TIGA PENGGUNAAN LAHAN DI DAERAH HUTAN HUJAN TROPIS SUPER BASAH PINANG-PINANG GUNUNG GADUT PADANG

Jurnal Solum ◽

10.25077/js.8.1.34-42.2011 ◽

2011 ◽

Vol 8 (1) ◽

pp. 34

Author(s):

Yulnafatmawita Yulnafatmawita ◽

Adrinal Adrinal ◽

Arief Fauzan Hakim

Keyword(s):

Land Use ◽

Land Use Change ◽

Rain Forest ◽

Tropical Rain Forest ◽

Soil Surface ◽

Soil Samples ◽

Annual Rainfall ◽

Undisturbed Soil ◽

Physical Laboratory ◽

West Sumatra

Study about soil organic matter (SOM) leaching in soil profiles of tropical rain forest was conducted in Bukit Pinang-Pinang, the upper footslope of Mt. Gadut in West Sumatra, and in Soil Physical laboratory Andalas University Padang. Bukit Pinang-Pinang is located on 480-640 m asl and geographically is between 100°29’40” and 100°30’20 E” as well as between 0°54’55” and 0°55’45”S. This rain forest area is known as a super wet area because it receives high annual rainfall (>3500 mm). The objective of this research was to measure the amount of SOM leached from top soil into the deeper soil. Undisturbed soil samples were taken from three different land uses, forest, bush, and mixed garden, on the top, middle, and foot slopes. Undisturbed soil samples were leached with distilled water as the amount of rainfall accepted in natural condition. The results showed that, land use change from forest into ecosystems of mixed garden (for over 50 years with 100% soil surface coverage and without any cultivation) and bush land (for over 20 years left) did not cause the SOM content in the profiles decreased. Amount of SOM leached from the top 0-10 cm was found greater from mixed garden, then followed by forest on the upper slope, forest on the middle slope, and bush area.Keywords: SOM leaching, land use change, tropical rain forest, bush, mixed garden

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Depth-Wise Fertility Status of Cultivated Soils in Low and Mid Hill Regions of Himachal Pradesh

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2021/v33i230411 ◽

2021 ◽

pp. 22-30

Author(s):

Gazala Nazir ◽

V. K. Sharma ◽

Deepika Suri ◽

. Anjali

Keyword(s):

Land Use ◽

Soil Nutrient ◽

Nutrient Status ◽

Himachal Pradesh ◽

Plant Production ◽

Detailed Knowledge ◽

Soil Nutrient Status ◽

Available N ◽

Fertility Status ◽

Cultivated Soils

Detailed knowledge of the soil nutrient status is required in site-specific crop production systems. Moreover, the vertical distribution of plant nutrients is most important for plant production. Therefore, the study was conducted to assess the depth-wise soil fertility status of low and mid hill zones of Himachal Pradesh based on thirty-one (31)soil profiles. Geo-referenced depth-wise soil samples were collected. These thirty-one (31) soils sampling sites were selected to represent the cultivated soils (Entisols, Alfisolsand Inceptisols) under major land-use systemsof low and mid-hill zones of Himachal Pradesh. The results of the soil nutrient status revealed that low to medium content of available N, P and S, low to medium content of available K except fewsubsurface horizons in Inceptisolswas found in most of the soils of low hill zone. Under different land-use systems in mid-hill zone, medium to high content of available N and K, low to medium of available P, low to high of available Swas found in most of the soils. Generally, surface soils had a higher mean values of N, P, S, Cu and Zn and lower values of K, Ca, Mg, Fe and Mn. Alfisols had higher value of all the nutrients as compared to Entisols and Inceptisols.

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