Vertical distribution and seasonal changes of fine and coarse root mass in Pinus kesiya Royle Ex.Gordon forest of three different ages

John, Babu; Pandey, H. N.; Tripathi, R. S.

doi:10.1016/s1146-609x(01)01118-3

Cited by 46 publications

(33 citation statements)

References 23 publications

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“…Several studies have reported a high density of fine roots in the upper soil layer, with approximately 70-90% of fine roots in the upper 20 cm of soil John et al 2001). Preliminary studies at our site showed the proportion of fine root biomass in the upper 20 cm of soil to be 71.1% on the upper slope and 85.3% on the lower slope (Hirobe et al, personal communication).…”

Section: Study Sitementioning

confidence: 56%

Nitrogen uptake and nitrogen use efficiency above and below ground along a topographic gradient of soil nitrogen availability

Tateno

Takeda

2010

Oecologia

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Nitrogen (N) uptake and nitrogen use efficiency (NUE) are closely related through feedback mechanisms to soil N availability and N cycling in forested ecosystems. We investigated N uptake and NUE not only at the leaf, litterfall, and aboveground levels but also belowground and whole stand levels along a topographic gradient of soil N availability in a cool temperate deciduous forest in Japan. In this study, we addressed how whole stand level N uptake and NUE affect C and N cycling in forested ecosystems. At the leaf, litterfall, and aboveground levels, N uptake decreased and NUE increased with decreasing soil N availability. This pattern resulted from decreasing leaf N concentrations and increasing N resorption efficiencies as soil N availability declined. Low N concentrations in litterfall may have resulted in little soil N being available to plants, due to microbial immobilization. In contrast, when belowground components were included, N uptake and NUE were not correlated with soil N availability. This was mainly due to higher levels of fine root production when soil N availability was low. Higher fine root allocation can result in a high input of detritus to decomposer systems and, thus, contribute to accumulation of soil organic matter and immobilization by microbes, which may result in further soil N availability decline. Our results suggest that allocation to the fine root rather than whole stand level NUE is important for C and N cycling in forested ecosystems, as is the feedback mechanism in which litterfall level NUE shifts with changes in the N concentration of litterfall.

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Section: Study Sitementioning

confidence: 56%

Nitrogen uptake and nitrogen use efficiency above and below ground along a topographic gradient of soil nitrogen availability

Tateno

Takeda

2010

Oecologia

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“…Quite a few workers in Poplar (Dickman et al, 1996;Lukac et al, 2003;Al Afas et al, 2008) and other species like scot pine, Japanese cedar, Khasi pine etc. (Friend et al, 2000;John et al, 2001;Janssens et al, 2002;Konopka et al, 2005Konopka et al, & 2006 also reported concentration of fine roots in upper layer. This variation of root concentration may be due to varied presence of coarse root, nutrient and moisture availability, soil structure, temperature and microbial activity in different soil layers.…”

Section: Fine and Coarse Root Distributionmentioning

confidence: 89%

Root Structure and Belowground Biomass of Hybrid Poplar in Forestry and Agroforestry Systems in Mediterranean France

Jha

2017

Not Sci Biol

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In poplar, one of the most used species of forestry and agroforestry, below ground biomass allocation plays an important role in providing anchorage as well as efficient nutrient and water distribution channel. Available literature on this aspect is not enough in hybrid Poplar, Populus euramaricana I-214. Therefore, the study was aimed at finding how this species developed its root system and how much belowground biomass was allocated in Forest System (FRS) and Agroforest System (AFS). This was done using soil excavation and root coring methods. Coarse roots were distributed in all directions but their number and proximal cross section area (CSA) were not uniform. In the case of AFS tree maximum CSA was distributed in the south and south-west direction while in FRS it was in the north-east and south-east direction. Fine roots were observed throughout the rooting zone along with coarse and medium roots up to a maximum depth of 2.4 m in FRS and 2.8 m in AFS. Total belowground biomass was higher in AFS tree (130 kg tree -1 ) than FRS tree (120 kg tree -1 ). But on hectare basis FRS accumulated (24.5 Mg ha ). However, if practiced in surplus agriculture area and considered the system as a whole, AFS allows grain production in lieu of some biomass deficit.

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“…The more common core-break sampling method (Babu et al 2001;Burke and Raynal 1994;Büttner and Leuschner 1994;Hendriks and Bianchi 1995;Schmid and Kazda 2002;Xu et al 1997) was discarded because RAR estimation from root biomass, root number or root length, implies hypotheses about the 3D distribution of roots inside the sample (Lopez-Zamora et al 2002).…”

Section: Tensile Strength Testsmentioning

confidence: 99%

Root cohesion of forest species in the Italian Alps

et al. 2009

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Forests can prevent and/or mitigate hydrogeomorphic hazards in mountainous landscapes. Their effect is particularly relevant in the case of shallow landslides phenomena, where plants decrease the water content of the soil and increase its mechanical strength. Although such an effect is well known, its quantification is a relatively new challenge. The present work estimates the effect of some forest species on hillslope stability in terms of additional root cohesion by means of a model based on the classical Wu and Waldron approach (Wu in Alaska Geotech Rpt No 5 Dpt Civ Eng Ohio State Univ Columbus, USA, 1976; Waldron in Soil Sci Soc Am J 41:843-849, 1977). The model is able to account for root distribution with depth and nonsimultaneous root breaking. Samples of European beech (Fagus sylvatica L.), Norway spruce (Picea abies (L.) Karst.), European larch (Larix decidua Mill.), sweet chestnut (Castanea sativa Mill.) and European hop-hornbeam (Ostrya carpinifolia Scop.), were taken from different locations of Lombardy (Northern Italy) to estimate root tensile strength, the Root Area Ratio and the root cohesion distribution in the soil. The results show that, in spite of its dramatic variability within the same species at the same location and among different locations, root cohesion can be coherently interpreted using the proposed method. The values herein obtained are significant for slope stabilisation, are consistent with the results of direct shear tests and back-analysis data, and can be used for the estimation of the stability of forested hillslopes in the Alps.

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Vertical distribution and seasonal changes of fine and coarse root mass in Pinus kesiya Royle Ex.Gordon forest of three different ages

Cited by 46 publications

References 23 publications

Nitrogen uptake and nitrogen use efficiency above and below ground along a topographic gradient of soil nitrogen availability

Nitrogen uptake and nitrogen use efficiency above and below ground along a topographic gradient of soil nitrogen availability

Root Structure and Belowground Biomass of Hybrid Poplar in Forestry and Agroforestry Systems in Mediterranean France

Root cohesion of forest species in the Italian Alps

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