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Bhatt, R. K.

Wood Specific Gravity of Trees in Hot Semi-Arid Zone of India:Diversity among Species and Relationship between Stem and Branches

Abstract Views :260 | PDF Views:78

Authors

Dipak Kumar Gupta ¹, R. K. Bhatt ², A. Keerthika ¹, A. K. Shukla ¹, M. B. Noor Mohamed ¹, B. L. Jangid ¹

Affiliations
1 ICAR-Central Arid Zone Research Institute, Regional Research Station, Pali-306 401, IN
2 ICAR-Central Arid Zone Research Institute, Jodhpur-342 003, IN

Source

Current Science, Vol 113, No 08 (2017), Pagination: 1597-1600

Abstract

Wood specific gravity (WSG) is an important parameter in allometric equations for accurate estimation of C-sequestration and other functional properties of a tree. However, WSG of many tree species especially of arid and semi-arid regions is poorly reported. Further, identifying indirect methods for determination of stem WSG from branches may be rapid and relatively easy. The present study determined WSG of stem and branches of 21 tree species in the hot semi-arid region of Western India. Three individual trees from each species were randomly selected and sampled for determination of WSG of stem, primary and secondary branch. WSG varied significantly among the species (F = 42.83, P < 0.001) and sampling locations (stem and branches) (F = 29.43, P < 0.001). In stem (at DBH), it ranged from 0.42 ± 0.04 to 0.74 ± 0.03 among the species while within an individual tree it varied in order of stem > primary branch > secondary branch in most species. WSG of stem and branches showed linear relationship and branches were found a good predictor of stem WSG (R² > 0.83).

Keywords

Arid Region, Branch, Tree Biomass, Wood Specific Gravity.

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References

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Carbon Sequestration Potential of Hardwickia Binata Roxb. Based Agroforestry in Hot Semi-Arid Environment of India: An Assessment of Tree Density Impact

Abstract Views :191 | PDF Views:77

Authors

Dipak Kumar Gupta ¹, R. K. Bhatt ², A. Keerthika ¹, M. B. Noor Mohamed ¹, A. K. Shukla ¹, B. L. Jangid ¹

Affiliations
1 ICAR-Central Arid Zone Research Institute, Regional Research Station, Pali-Marwar - 306 401, IN
2 ICAR-Central Arid Zone Research Institute, Jodhpur - 342 003, IN

Source

Current Science, Vol 116, No 1 (2019), Pagination: 112-116

Abstract

Agroforestry is one of the most promising options for climate change mitigation through carbon sequestration. However, carbon sequestered in agroforestry system depends on various factors like type of tree species, tree density, system age, soil and climate. One of the most important factors for enhancing carbon sequestration per unit land is tree density. Hardwickia binata Roxb. has been reported as suitable agroforestry tree species with multiple benefits in arid and semi-arid region, however, the role and impact of tree density in carbon sequestration is poorly reported. This study estimated impact of tree density (D₁ = 333 tree ha^-1 and D₂ = 666 tree ha^-1) on carbon sequestration potential of 30-year-old H. binata Roxb. + Cenchrus setigerus silvipasture system in hot semiarid region of Rajasthan. The carbon sequestered in tree biomass was estimated by reported allometric equations, whereas in soil it was determined by Walkley and Black method. Results showed significant impact of tree density on carbon sequestration per unit tree and per hectare land. The average biomass carbon sequestered by a tree was significantly more (44.5%) in low density (D₁) compared to high density (D₁) system. However, total biomass carbon sequestered per hectare land was significantly more (40.8%) in high density system (31.6 ± 12.6 Mg C ha^-1. Carbon sequestered in soil organic matter was higher in both D₁ and D₁ systems compared to control (sole Cenchrus setigerus field). It ranged from 19.93 ± 0.31 Mg C ha^-1 in control to 22.94 ± 0.65 Mg C ha^-1 and 23.25 ± 0.78 Mg C ha^-1 in D₁ and D₂ respectively. The total carbon sequestered (below and above ground tree biomass and soil organic carbon) was in the order D₂ > D₁ > control.

Keywords

Agroforestry, Allometric Equation, Arid and Semiarid Regions, Silvipasture, C-Sequestration, Tree Density.

Full Text

References

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Carbon Sequestration Potential of Agroforestry Systems in the Indian Arid Zone

Abstract Views :297 | PDF Views:79

Authors

S. P. S. Tanwar ¹, Praveen Kumar ¹, Archana Verma ¹, R. K. Bhatt ¹, Akath Singh ¹, Kanhaiya Lal ¹, M. Patidar ¹, B. K. Mathur ¹

Affiliations
1 ICAR-Central Arid Zone Research Institute, Jodhpur 342 003, IN

Source

Current Science, Vol 117, No 12 (2019), Pagination: 2014-2022

Abstract

Carbon sequestration potential of eight recommended land-use systems of arid western Rajasthan was compared. Biomass C stock was maximum in farm forestry of Acacia tortilis (31.4 Mg C ha^–1) followed by Prosopis cineraria and Hardwickia binata based silvoarable systems (8.8 and 10.6 Mg C ha^–1). Soil C stock was also maximum in farm forestry (47.6 Mg C ha^–1) followed by Ziziphus based systems (32.5–33.9 Mg C ha^–1). About 50–78% of additional soil C stock was in the form of soil inorganic carbon. The total C sequestered (biomass + soil) over a period of nineteen years was in the order: farm forestry (49.80) > silvoarable systems (11.0–13.3) > hortipasture system (8.3) > agri-horti (5.5), silvopasture (5.4) and sole pasture (5.3) compared to –1.0 Mg C ha^–1 in sole cropping.

Keywords

Agroforestry, Arid Zone, Carbon Sequestration, Climate Change Mitigation.

Full Text

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Frost Heaves in the Cold Arid Leh–Ladakh Region: Observations on their Morphological Variability and Patterns as Indicators of Pastureland Degradation

Abstract Views :237 | PDF Views:88

Authors

P. C. Moharana ¹, M. S. Raghuvanshi ², R. K. Bhatt ¹, R. K. Goyal ¹, R. K. Singh ¹, H. M. Meena ¹, Mahesh Kumar ¹, Stanzin Landol ³

Affiliations
1 ICAR-Central Arid Zone Research Institute, Jodhpur 342 003, IN
2 ICAR-National Bureau of Soil Survey and Landuse Planning, Nagpur 440 033, IN
3 ICAR-Central Arid Zone Research Institute, Regional Research Station, Leh, IN

Source

Current Science, Vol 119, No 5 (2020), Pagination: 799-807

Abstract

This study analysed frost heave lands in the cold arid Leh–Ladakh region of the Himalaya, India through semi-detail field survey and remote sensing. Most of these sites are highland grasslands occurring along the alluvial plains of rivers in the Leh and Nubra valleys. The study identified the occurrence of some unique frost heave patterns whose morphometry varied from simple, isolated to complex ones with elongated, coalesced and superimposed bedforms. These lands can be further subdivided into vegetated and degraded types. The degraded forms exhibited several cracks, dry, collapsed and slump structures. Invasion of Cirsium arvense over native grass species, soil salinity and feeding pressure by livestock have been identified as major land degradation factors. C. arvense has replaced the native vegetation on frost heaves and has allowed Carex species to grow, which is known to degrade and deplete the pasture ecology.

Keywords

Cold Arid Region, Frost Heaves, Morphological Variability And Patterns, Pastureland Degradation.

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