Effects of fertilization and watering regimes on early growth and leaf biomass production for two food tree species in the Sahel: Moringaoleifera Lam. and Adansoniadigitata L.

2014 ◽  
Vol 3 (4) ◽  
pp. 82-88
Author(s):  
M. Larwanou ◽  
◽  
M. M. Adamou ◽  
T. Abasse ◽  
◽  
...  
Keyword(s):  
Biomass Production ◽  
Tree Species ◽  
Early Growth ◽  
Leaf Biomass

scholarly journals Fertilization and Shading Trials to Promote Pinus nigra Seedlings’ Nursery Growth under the Climate Change Demands

2021 ◽  
Vol 13 (6) ◽  
pp. 3563
Author(s):  
Marianthi Tsakaldimi ◽  
Panagiota Giannaki ◽  
Vladan Ivetić ◽  
Nikoleta Kapsali ◽  
Petros Ganatsas
Keyword(s):  
Tree Species ◽  
Block Design ◽  
Pinus Nigra ◽  
Fertilization Rate ◽  
Early Growth ◽  
Climate Scenarios ◽  
Northern Greece ◽  
Randomized Block Design ◽  
Below Ground ◽  
High Fertilization

Pinus nigra is one of the most widely used tree species for reforestation within its geographical distribution, as well as being a potential substitute for other tree species in Central Europe under future climate scenarios. P. nigra is transplanted into the field as two-year or three-year old seedlings because of its relatively low growth rate in the nursery. This study investigated the effects of fertilization programs and shading on P. nigra seedlings, aiming to accelerate early growth, and thus to reduce the nursery rearing time. The experiment (a completely randomized block design) was conducted in an open-air nursery by sowing seeds from Grevena, Northern Greece, in Quick pots filled with peat and perlite in a 2:1 ratio. The seedlings were subjected to two levels of fertilization—5 and 10 g L−1 NPK (30-10-10)—and two shading levels: 50% and 70%. At the ends of the first and second nursery growing season, we recorded the seedlings’ above- and below-ground morphology and biomass data. The results show that the application of all of the treatments produced seedlings which met the targeted quality standards for outplanting. However, the combination of a high fertilization rate and low shading level resulted in seedlings of a higher morphological quality, which is often considered to be an indicator for a successful seedling establishment in the field.

scholarly journals New version of the 3-PG model of biomass production for the most common tree species in European Russia

2018 ◽  
Author(s):  
V.N. Shanin ◽  
P.Ya. Grabarnik ◽  
S.S. Bykhovets ◽  
O.G. Chertov ◽  
M.P. Shashkov ◽  
...  
Keyword(s):  
Biomass Production ◽  
Tree Species ◽  
European Russia ◽  
Common Tree

scholarly journals Root Growth of Avocado is More Sensitive to Salinity than Shoot Growth

2004 ◽  
Vol 129 (2) ◽  
pp. 188-192 ◽  
Author(s):  
N. Bernstein ◽  
A. Meiri ◽  
M. Zilberstaine
Keyword(s):  
Salt Stress ◽  
Root Growth ◽  
Biomass Production ◽  
Root Elongation ◽  
Shoot Growth ◽  
Elongation Rate ◽  
Persea Americana ◽  
Root Growth Inhibition ◽  
Leaf Biomass ◽  
Volumetric Growth

In most crop species, growth of the shoot is more sensitive to salt stress than root growth. Avocado [Persea americana Mill.] is very sensitive to NaCl stress. Even low concentrations of salt (15 mm) inhibit tree growth and decrease productivity. Observations in experimental orchards have suggested that root growth in avocado might be more restricted by salinity than shoot growth. In the present study, we evaluated quantitatively the inhibitory effects of salt stress on growth of the avocado root in comparison to the shoot. Seedling plants of the West-Indian rootstock `Degania 117' were grown in complete nutrient solution containing 1, 5, 15, or 25 mm NaCl. The threshold NaCl concentration causing root and shoot growth reduction occurred between 5 and 15 mm. At all concentrations, root growth was much more sensitive to salinity than shoot growth. A concentration of 15 mm NaCl, which did not affect the rate of leaf emergence on the plant and decreased leaf biomass production only 10%, induced a 43% reduction in the rate of root elongation and decreased root volumetric growth rate by 33%. Under 25 mm NaCl, leaf biomass production, leaf initiation rate and leaf elongation rate were reduced 19.5%, 12%, and 5%, respectively, while root volumetric growth and root elongation rate were reduced 65% and 75%, respectively. This strong root growth inhibition is expected to influence the whole plant and therefore root growth under salinity should be considered as an important criterion for rootstocks' tolerance to NaCl.

scholarly journals Seasonal Effect on Growth Performance and Leaf Biomass Production of Two Moringa oleifera Lam. Varieties Grown under Sahelian Condition in Burkina Faso

2019 ◽  
pp. 1-12
Author(s):  
François Wenemi Kagambèga ◽  
Abdoul Rasmane Bagagnan ◽  
Augustine Ayantunde ◽  
Louis Sawadogo
Keyword(s):  
Burkina Faso ◽  
Growth Performance ◽  
Biomass Production ◽  
Moringa Oleifera ◽  
Block Design ◽  
Leaf Biomass ◽  
Seasonal Effect ◽  
Number Of Leaves ◽  
Sowing Period ◽  
Foliar Biomass

Aims: An experiment was conducted to compare the growth performance of two varieties of Moringa oleifera (wild variety and PKM-1) under different seasonal period at two locations in northern Burkina Faso, and the potential for improving household nutrition. Study Design, Place and Duration of Study: Two separate trials corresponding to sowing period (cold and warm) were laid out at each site (Bani and Tougou) in a completely randomized block design with three replicates between December 2017 and September 2018. Methodology: Each block was subdivided into two plots of 8 m² (separated from each other by 3 m break) intended to receive each variety of Moringa at each sowing period. The seeds were sown with 2 seeds by pit at 2 cm depth with spacing of 0.5 m x 0.5 m in each plot ploughed up to 30 cm. Watering was done daily during the dry season and consisted of applying 24 liters of water in each plot at two times. Vegetative growth measurements (plant height, number of leaves) were done weekly while leaf biomass production was assessed monthly from the 40th day after sowing. Results: The results showed that seedlings growth parameters and foliar biomass differed significantly (p < 0.001) among the two Moringa oleifera varieties and were influenced by the sowing period and sites. Although the two varieties grew well, Moringa oleifera var PKM-1 grew faster and produced much leaves compared to the wild or local variety. Then, greater growth attributes (height and number of leaves) and foliar biomass were noted for PKM-1. Conclusion: The warm period (March / April) appear to be the most recommendable period for the growth and biomass accumulation of the two varieties of Moringa oleifera.

scholarly journals SPACING, PIT SIZE AND IRRIGATION INFLUENCE EARLY GROWTH PERFORMANCES OF FOREST TREE SPECIES

2021 ◽  
Vol 33 (1) ◽  
pp. 69-76
Author(s):  
N Mohammad ◽  
M Rajkumar ◽  
K Singh ◽  
NPS Nain ◽  
S Singh ◽  
...  
Keyword(s):  
Tree Species ◽  
Forest Tree ◽  
Early Growth ◽  
Forest Tree Species ◽  
Growth Performances

Observations on survival and early growth of natural regeneration in floodplain coolibah Eucalyptus victrix (Myrtaceae) in the Pilbara, Western Australia

2004 ◽  
Vol 26 (2) ◽  
pp. 150 ◽  
Author(s):  
J. E. D. Fox ◽  
S. K. Florentine ◽  
M. E. Westbrooke ◽  
C. Hurst
Keyword(s):  
Western Australia ◽  
Tree Species ◽  
Natural Regeneration ◽  
Mortality Rates ◽  
Early Growth ◽  
Natural Fire ◽  
Growth And Survival ◽  
Burnt Site ◽  
Hill Station ◽  
Second Year

Observations are presented on the natural regeneration of Eucalyptus victrix L. Johnson and K. Hill (coolibah), the dominant tree species of grassy woodlands on the floodplain of the Fortescue River, north of Newman in the Pilbara district of Western Australia. The main objectives of this study were to examine: (i) survival of newly recruited E. victrix seedlings on flooded and burnt sites, and (ii) growth and survival of established plants in a gilgaied landscape. Populations of newly-recruited seedlings following flooding or fire were monitored opportunistically at 'Marillana' and 'Ethel Creek' stations, for up to two years from tagging. A population of saplings at 'Roy Hill' station was observed over eight years. Seedling densities of E. victrix in flooded sites were 0.32 and 1.03 plants/m2 in 1995 and 1997 respectively. Locally high densities reached from 1.2 to 17.7 plants/m2 on areas of 28 and 6 m2 respectively. At the burnt site at 'Ethel Creek', 1.30 plants/m2 were observed where 58 seedlings were recorded on an area of 445 m2 a year after a natural fire. Many of these persisted well into their second year, whereas seedlings recruited in the flooded sites generally lasted less than a year (250-376 days). In contrast, persistence of a cohort of 100 established saplings < 2 m tall in a gilgaied landscape at 'Roy Hill' was high. During 8 years of observations, only one sapling was lost. Those found at the edges of gilgais had attained greater heights (3.91 � 1.14 m) than saplings located inside (3.16 � 0.95 m) or on top (3.12 � 0.93 m) of the gilgais. This study demonstrates that the seedling stage in E. victrix is critical, in that once newly recruited individuals reach the sapling stage (0.611 m), mortality rates are much reduced. Unfortunately, it was not possible during the course of this study to locate a cohort of young seedlings that did survive and so any consideration of the conditions necessary for their survival is purely speculative.

Sign in / Sign up

Export Citation Format

Share Document