scholarly journals Comparison of Shoot Water Potential in Plantation and Natural Forest Trees of Haloxylon ammodendron (C.A.Mey) Bunge ex Fenzl Desert Region, Mongolia

2021 ◽  
Author(s):  
Enkhchimeg Tsedensodnom ◽  
Ser-Oddamba Byambadorj ◽  
Narantugs Dulamsuren ◽  
Khaulanbek Akhmadi ◽  
Batkhuu Nyam-Osor
Keyword(s):  
Water Potential ◽  
Natural Forest ◽  
Forest Trees ◽  
Haloxylon Ammodendron ◽  
Desert Region

Variation Characteristics of Water Content in Two Typical Eremophytes under Drought Stress in the Drift Desert Hinterland

2013 ◽  
Vol 316-317 ◽  
pp. 316-322
Author(s):  
Zheng Zhong Jin ◽  
Rahmutulla Zaynulla ◽  
Jia Qiang Lei ◽  
Murat A. Yakubov
Keyword(s):  
Soil Moisture ◽  
Drought Stress ◽  
Water Potential ◽  
Water Content ◽  
Taklimakan Desert ◽  
Haloxylon Ammodendron ◽  
Variation Characteristics ◽  
Nitraria Sibirica ◽  
Lower Limits ◽  
Southern Xinjiang

To reveal relationship between water content of plant tissue and soil moisture in the hinterland of Taklimakan desert in China's southern Xinjiang, Haloxylon ammodendron and Nitraria sibirica were selected, and the water potential and content in the tissues of two plants under drought stress were determined. The results were shown that: (1) water potential in the morning and the water content in the tissues of Haloxylon ammodendron and Nitraria sibirica decreased with the decline of soil moisture content. (2) When the soil water stress appeared, the water potential values of Haloxylon ammodendron and Nitraria sibirica were -4.47 MPa and -5.88 MPa, respectively. (3) The lower limits of soil moisture contents that were suitable for the growth of Haloxylon ammodendron and Nitraria sibirica were 2.50% and 3.00%, respectively.

A Method to Measure Radial Incremenf in Tropical Trees

IAWA Journal ◽  
1989 ◽  
Vol 10 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Takayoshi Shiokura
Keyword(s):  
Tropical Trees ◽  
Natural Forest ◽  
Radial Increment ◽  
Forest Trees ◽  
Breast Height ◽  
East Kalimantan ◽  
Iriomote Island ◽  
Mangrove Trees

Radial increment was studied in natural forest trees in East Kalimantan, Indonesia, and in mangrove trees in Thailand and on Iriomote Island (Japan). Nails were driven into the trunk at breast height. Barrier zones fonned in response were located after felling of the tree, and the amount of wood fonned subsequent to nailing was measured. Thanks to the distinctness of the cambial response to nailing, this method appears very effective for measuring radial increment in tropical trees. The following results were obtained:

Seasonal dependence of rooting success in cuttings from natural forest trees in Madagascar

2008 ◽  
Vol 73 (1) ◽  
pp. 47-53 ◽  
Author(s):  
P. Danthu ◽  
N. Ramaroson ◽  
G. Rambeloarisoa
Keyword(s):  
Natural Forest ◽  
Forest Trees ◽  
Seasonal Dependence

A comparison of water relations, visual symptoms, and changes in stem girth for evaluating impact of Phytophthoracinnamomi dieback on Eucalyptusmarginata

1990 ◽  
Vol 20 (2) ◽  
pp. 233-240 ◽  
Author(s):  
D. Stuart Crombie ◽  
J. T. Tippett
Keyword(s):  
Water Stress ◽  
Stomatal Conductance ◽  
Water Potential ◽  
Water Relations ◽  
Subjective Assessment ◽  
Forest Trees ◽  
Short Term ◽  
Visual Symptoms ◽  
Severe Water Stress ◽  
Crown Form

Water relations, stem girth, and crown vigour were measured in jarrah (Eucalyptusmarginata Donn ex Sm.) trees in adjoining areas of healthy and dieback-affected forest. The soil-borne fungus Phytophthoracinnamomi Rands was recovered from soils in the dieback areas, but not from neighbouring healthy forest. Trees on dieback sites were found to be more water stressed (with lower dawn water potentials and daytime stomatal conductances) than healthy trees on nearby areas free of P. cinnamomi. Severe water stress usually preceded crown deaths by several weeks to months. Dawn water potential and midday stomatal conductance were the most useful nondestructive indicators of dieback severity in declining trees. Subjective assessment of crown form was slightly less reliable than water relations as a separator of dieback and healthy trees. Changes in trunk girth were the least sensitive indicators of dieback severity. Midday stomatal conductance is recommended as a useful tool for monitoring short-term changes in vigour of dieback-affected trees.

scholarly journals DRY-FIELD (TEGALAN) AGROFORESTRY SYSTEMS AS MINIATURE NATURE FOREST IN OUTSIDE FOREST AREA ON BULU - GIRIPURWO VILLAGE, GIRIMULYO DISTRICT, KULONPROGO

2015 ◽  
Vol 2 (1) ◽  
pp. 213
Author(s):  
Chandra Nur Triwiyanto ◽  
Priyono Suryanto ◽  
Budiadi _
Keyword(s):  
Mixed Models ◽  
Forest Ecosystems ◽  
Mixed Model ◽  
Agroforestry Systems ◽  
Natural Forest ◽  
Equation Modeling ◽  
Intensive Management ◽  
Forest Trees ◽  
Exponential Equation ◽  
Selection Of

<p>A dry-field (tegalan) is one of the subsystems of classical agroforestry, where there is no intensive management of both the spacing and the selection of the type that is considered. Dry-field (tegalan) agroforestry subsystems have a state that resembles natural forest ecosystems. It became an opportunity execution of research related to the stands composition of dry-field (tegalan) and forest nature. The purpose of this study is to determine the pattern of developing agroforestry in Bulu and the relation of the natural forest. This research was conducted in Bulu-Giripurwo Village, Girimulyo District, Kulonprogo. Data was collected at 36 sample plots representing 3 strata. The first stratum had an area of &lt; 1000 m2, the second 1,000 m2–2,000 m2, and the third &gt; 2,000 m2. K-Means Cluster Analysis and exponential equation modeling was used to analyze the dry-field (tegalan). The results of this study indicate that there were three models of management of cultivated land in Bulu; the Mixed Model, Model MPTS dominant plants, and forest trees dominant model. Mixed models had the stand equation Y = 3.39 x 2.7128-0,026X with an R2 of 0.798. The dominant MPTS plan models had the stand equation 3,155 x 2.7128-0,021X with an R2 of 0.770. The dominant of forest trees models has stands equation Y = 3.182 x 2.7128-0,024X with R2 of 0.706. These results demonstrate agroforestry modeling subsystem dry-field (tegalan) has characteristics resembling natural forest indicated from the value of R2 that characterized so close with the equation of uneven-aged forest model.</p><p><br /><strong>Keywords</strong>: Agroforestry, dry-field (tegalan), natural forest</p>

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