BIOMASS ALLOCATION AND PHOSPHORUS PRODUCTIVITY OF CAREX SPECIES IN RELATION TO SOIL PHOSPHORUS STATUS

1999 ◽  
Vol 47 (2) ◽  
pp. 97-102 ◽  
Author(s):  
María Esther Pérez-Corona ◽  
Jos T.A. Verhoeven
Keyword(s):  
Leaf Area ◽  
Biomass Allocation ◽  
Soil Phosphorus ◽  
Peat Soils ◽  
Soil P ◽  
Plant Parts ◽  
Ground Biomass ◽  
P Content ◽  
Below Ground ◽  
Phosphorus Status

Biomass allocation and P productivity were studied in threeCarexspecies (C. acutiformis, C. diandra, andC. lasiocarpa) that were grown in fen peat soils differing in P content. Biomass allocation to plant parts and P productivity involved significant interactions between soil P status and species.C. acutiformis, a species from highly productive areas, showed higher biomass production, P productivity, leaf area ratio, and specific leaf area under P-deficient conditions thanC. diandraandC. lasiocarpa, both species from less productive areas. Below-ground biomass allocation ofC. acutiformisand above-ground biomass allocation ofC. diandraand C.lasiocarpashowed plasticity in relation to soil P status.These results were remarkable since C.acutiformis, a species from eutrophic fen areas, was expected to perform worse under P-deficient conditions than those species naturally growing in those areas. Species demands on the chemical composition of the interstitial water, specific abilities to use nondirectly available P pools, faster seed germination, or seedling establishment may contribute to determine the field distribution of fenCarexspecies in relation to soil P status.

scholarly journals Biomass allocation in natural regeneration of Fagus sylvatica and Picea abies trees in Italian Alps

2014 ◽  
Vol 61 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Fabio Pastorella ◽  
Alessandro Paletto
Keyword(s):  
Leaf Area ◽  
Norway Spruce ◽  
Biomass Allocation ◽  
Growth Stages ◽  
Area Index ◽  
Ground Biomass ◽  
Non Linear ◽  
Below Ground ◽  
The Relationship ◽  
Linear Regressions

Abstract Biomass allocation in seedlings and saplings at different stages of growth is important information for studying the response of species to site conditions. The objectives of the paper are: (a) to analyse the relationship between height and biomass in young Norway spruce and European beech trees, (b) to study the influence of the leaf area on ontogenetic growth stages and biomass sequestration capacity on the regeneration of these two species. 96 seedlings (H < 30 cm) and saplings (31 < H < 130 cm) were collected in different light conditions in a case study in the Alps (Trentino province, Italy). Leaf Area Index and shoot/root ratio were used as indicators of the ecological conditions (e.g. light, soil moisture, nutrient status) able to influence the seedlings and saplings growth. Two non-linear regressions were fitted to analyse the relationship between height and biomass and to develop the aboveground and below-ground allometric equations. Non-linear regressions show that sapling or seedling height is a good predictor of above-ground and below-ground biomass with a R2aj above 0.8 for all equations and a R2aj above 0.9 for above-ground biomass of Norway spruce. The results show that silvicultural practices may influence the regeneration patterns and increase the biomass allocation rate influencing stand density and canopy cover.

scholarly journals Strong stoichiometric resilience after litter manipulation experiments; a case study in a Chinese grassland

2015 ◽  
Vol 12 (3) ◽  
pp. 757-767 ◽  
Author(s):  
C. Xiao ◽  
I. A. Janssens ◽  
Y. Zhou ◽  
J. Su ◽  
Y. Liang ◽  
...  
Keyword(s):  
Climate Change ◽  
Plant Biomass ◽  
Net Primary Production ◽  
Global Climate ◽  
Litter Addition ◽  
Ground Biomass ◽  
P Content ◽  
Litter Manipulation ◽  
Soil Inorganic N ◽  
Below Ground

Abstract. Global climate change has generally modified net primary production (NPP) which leads to increasing litter inputs in some ecosystems. Therefore, assessing the impacts of increasing litter inputs on soil nutrients, plant growth and ecological carbon (C) : nitrogen (N) : phosphorus (P) stoichiometry is critical for an understanding of C, N and P cycling and their feedback processes to climate change. In this study, we added plant above-ground litter, harvested near the experimental plots, to the 10–20 cm subsoil layer of a steppe community at rates equivalent to annual litter input of 0, 15, 30, 60 and 120%, respectively, covering the entire range of the expected NPP increases in this region due to climate change (10–60%). We measured the resulting C, N and P content of different pools (above- and below-ground plant biomass, litter, microbial biomass). Small litter additions, which are more plausible compared to the expected increase predicted by Earth system models, had no effect on the variables examined. Nevertheless, high litter addition (120% of the annual litter inputs) significantly increased soil inorganic N and available P, above-ground biomass, below-ground biomass and litter. Our results suggest that while very high litter addition can strongly affect C : N : P stoichiometry, the grassland studied here is resilient to more plausible inputs in terms of stoichiometric functioning.

Trade‐offs in above‐ and below‐ground biomass allocation influencing seedling growth in a tropical forest

2020 ◽  
Author(s):  
María Natalia Umaña ◽  
Min Cao ◽  
Luxiang Lin ◽  
Nathan G. Swenson ◽  
Caicai Zhang
Keyword(s):  
Tropical Forest ◽  
Seedling Growth ◽  
Biomass Allocation ◽  
Ground Biomass ◽  
Trade Offs ◽  
Below Ground

scholarly journals Effect of glyphosate and P on the growth and nutrition of Coffea arabica cultivars and on weed control

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yanna Karoline Santos da Costa ◽  
Nagilla Moraes Ribeiro ◽  
Guilherme Cesar Pereira de Moura ◽  
Artur Rodrigues Oliveira ◽  
Silvano Bianco ◽  
...  
Keyword(s):  
Leaf Area ◽  
Weed Control ◽  
Coffea Arabica ◽  
Dry Matter ◽  
The Other ◽  
Soil P ◽  
Growth And Nutrition ◽  
P Content ◽  
Urochloa Decumbens ◽  
Coffee Plants

AbstractThe effect of the phosphorus (P) and glyphosate interactions on the growth and nutrition of Arabica coffee cultivars (Coffea arabica), as well as on the control of Ipomoea grandifolia and Urochloa decumbens, was evaluated. Catuaí-Amarelo/IAC-62 and Catuaí-Vermelho/IAC-144 cultivars did not show glyphosate poisoning, regardless of the soil P content. However, glyphosate reduced the growth of Catuaí-Vermelho/IAC-144. In addition, the soil P content influenced the height, leaf area and dry matter of Catuaí-Amarelo/IAC-62, and the absorption of P and Ca in both cultivars. On the other hand, glyphosate efficiently controlled U. decumbens but not I. grandifolia. Glyphosate effectiveness on I. grandifolia decreased as the soil P content increased. In addition, the soil P content and the glyphosate influenced the P content in I. grandifolia and U. decumbens plants. The soil P content influenced the growth and absorption of other nutrients by coffee plants as well as glyphosate effectiveness on weed control.

Contrasting changes in above- and below-ground biomass allocation across treeline ecotones in southeast Tibet

2016 ◽  
Vol 13 (11) ◽  
pp. 2036-2045 ◽  
Author(s):  
Xin-sheng Liu ◽  
Yu-qin Nie ◽  
Gao-qiang Kong ◽  
Tian-xiang Luo
Keyword(s):  
Biomass Allocation ◽  
Ground Biomass ◽  
Below Ground ◽  
Southeast Tibet

The impacts of warming and nitrogen addition on competitive ability of native and invasive populations of Plantago virginica

2020 ◽  
Vol 13 (6) ◽  
pp. 676-682
Author(s):  
Xi Luo ◽  
Yi Zheng ◽  
Xiaohong Xu ◽  
Rui Xiao ◽  
Hui Guo
Keyword(s):  
Invasive Species ◽  
Biomass Allocation ◽  
Competitive Ability ◽  
Nitrogen Addition ◽  
Invasive Population ◽  
N Addition ◽  
Competitive Response ◽  
Ground Biomass ◽  
Below Ground ◽  
Allocation Strategies

Abstract Aims Global change factors (e.g. warming and nitrogen deposition) may influence biological invasions, but how these factors may influence the performance of invasive species and further mediate the interactions with native competitors remain still unknown. Methods Here, we conducted a 5-month greenhouse experiment to examine the effects of warming (using open-top chambers, +0.62°C) and N addition (adding NH4NO3 at a rate of 4.2 g m−2) on the performance of the native and invasive populations of an invasive species Plantago virginica in competition with a native Plantago asiatica. Important Findings Under warming treatment and its interaction with nitrogen addition treatment (W × N), invasive and native populations of P. virginica had different biomass allocation strategies to compete with native competitor P. asiatica. Native population of P. virginica (PV-Na) increased more below-ground biomass, whereas those from the invasive population (PV-In) increased more above-ground biomass. We also found that invasive species P. virginica had stronger responses to warming and N addition than the native species P. asiatica. The competitive ability of the invasive plants was significantly reduced by warming which indicated that the invasive plant were much stronger sensitivity to elevated temperature than native plant. Similarly, N addition and W × N reduced the competitive response of PV-In in below-ground biomass, but increased the competitive response of PV-Na in above-ground and total biomass when they grew with the P. asiatica. The results show that P. virginica have occurred differential biomass allocation strategies during its invasions and invasive population exhibit flexible competition ability to adapt to environmental changes (especially warming). These findings may potentially help to predict plant invasions and make management strategies in a world with changing climate.

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