Soil temperature in an open site and below two plantation forest canopies in a tropical highland area, southern Ethiopia

2019 ◽  
Vol 139 (3-4) ◽  
pp. 907-914 ◽  
Author(s):  
Shiferaw Alem ◽  
Petr Madera ◽  
Jindrich Pavlis
Keyword(s):  
Soil Temperature ◽  
Southern Ethiopia ◽  
Plantation Forest ◽  
Forest Canopies ◽  
Highland Area ◽  
Open Site

Comparison of soil respiration among three temperate forests in Changbai Mountains, China

2010 ◽  
Vol 40 (4) ◽  
pp. 788-795 ◽  
Author(s):  
Xu Wang ◽  
Yanling Jiang ◽  
Bingrui Jia ◽  
Fengyu Wang ◽  
Guangsheng Zhou
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Secondary Forest ◽  
Temperature Response ◽  
Stand Age ◽  
Changbai Mountains ◽  
Primary Forest ◽  
Plantation Forest ◽  
Successional Stage ◽  
Coniferous Plantation

CO2 efflux from forest soils is an important process in the global carbon cycle; however, effects of stand age and successional status remain uncertain. We compared soil respiration and its relationship to soil carbon content, forest floor mass, root biomass, soil temperature, and soil moisture content among three temperate forest ecosystems in Changbai Mountains, northeastern China, from 2003 to 2005. Forest types included an old-growth, mixed coniferous and broad-leaved primary forest (MN), a middle-aged, broad-leaved secondary forest (BL), and a young coniferous plantation forest (CP). Average annual soil CO2 efflux at BL (1477.9 ± 61.8 g C·m–2·year–1) was significantly higher than at CP (830.7 ± 48.7 g C·m–2·year–1) and MN (935.4 ± 53.3 g C·m–2·year–1). Differences in soil temperature among those sites were not statistically significant but contributed to the differences in annual CO2 efflux. In addition, the temperature response of soil CO2 efflux was higher at MN (Q10 = 2.78) than that at BL (Q10 = 2.17) and CP (Q10 = 2.02). Our results suggest that successional stage affects soil respiration by the differences in substrate quantity and quality, environmental conditions, and root respiration.

Role of seed sowing time and microclimate on germination and seedling establishment of Dodonaea viscosa (Sapindaceae) in a seasonal dry tropical environment — an insight into restoration efforts

Botany ◽  
2015 ◽  
Vol 93 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Ganesh K. Jaganathan ◽  
Baolin Liu
Keyword(s):  
Soil Temperature ◽  
Seedling Establishment ◽  
Seedling Survival ◽  
Light Availability ◽  
Hot Water ◽  
Dodonaea Viscosa ◽  
Wet Season ◽  
Sowing Time ◽  
Open Site ◽  
Seed Sowing

Reintroduction of plants in a tropical forest is imperative not only to maintain remnant forests, but also to preserve the extant flora against global warming and other induced effects. The importance of seed sowing time and microclimate on seed germination and seedling establishment of Dodonaea viscosa Jacq. were investigated in Tamil Nadu, India, to provide information to assure the successful reintroduction of this species. A field experiment was conducted by sowing seeds (whose dormancy had been broken by hot water) in a natural environment at a depth of 3 cm in three microsites (artificially shaded, naturally shaded, and open) in February and August 2011. Seedling survival was monitored for 2 years at 6 month intervals under natural conditions. Soil temperature and light availability were measured. Soil temperature was moderate in shaded regions but light availability was low, and the opposite was true for the open site. Rainfall was a major trigger for stimulating germination. Seeds sown in August survived better after 2 years compared with those sown in February (p < 0.0001). Microsite significantly (p < 0.005) affected the total seedling survival with the percentage of successful seedlings established decreasing from the artificially shaded site to the open site. Seedling mortality in both groups mainly occurred during the dry summer season. The wet season benefited germination and seedling growth. We conclude that sowing seeds or planting seedlings of D. viscosa early in the wet season is beneficial to reintroduction success.

THE ROLE OF GRASSLAND IN MANAGEMENT

1968 ◽  
pp. 44-49
Author(s):  
B.K. Cameron
Keyword(s):  
Soil Temperature ◽  
Annual Rainfall ◽  
Silt Loam ◽  
Average Annual Rainfall ◽  
Very High ◽  
Wilting Point

THE PROPERTY to be discussed is a mixed sheep and cropping unit, situated ei ht a miles east of Ashburton and midway between the Ra aia and the Ashburton rivers. Average annual rainfall is 27 in., evenly spread, but there is very high summer evaporation and therefore frequent droughts. On average, the soil is below wilting point for 40 to 50 days each summer. Winters are cold with the soil temperature being below 48°F for about four months each year. The soil is a Lismore stony silt loam averaging 9 in. in depth over gravel.

Relation between soil temperature and biophysical parameters in Indian mustard seeds

2013 ◽  
Vol 27 (4) ◽  
pp. 359-367 ◽  
Author(s):  
T. Adak ◽  
N.V.K. Chakravarty
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Soil Temperature ◽  
Surface Soil ◽  
Linear Regression Analysis ◽  
Indian Mustard ◽  
Biophysical Parameters ◽  
Oil Accumulation ◽  
Area Index ◽  
Surface Soil Temperature

Abstract Temporal changes in surface soil temperature were studied in winter crop. Significant changes in bare and cropped soil temperature were revealed. Air temperature showed a statistically positive and strong relationship (R2 = 0.79** to 0.92**) with the soil temperature both at morning and afternoon hours. Linear regression analysis indicated that each unit increase in ambient temperature would lead to increase in minimum and maximum soil temperatures by 1.04 and 1.02 degree, respectively. Statistically positive correlation was revealed among biophysical variables with the cumulative surface soil temperature. Linear and non-linear regression analysis indicated 62-69, 72-86 and 72-80% variation in Leaf area index, dry matter production and heat use efficiency in Indian mustard crop as a function of soil degree days. Below 60% variation in yield in Indian mustard was revealed as a function of soil temperature. In contrast, non-significant relationship between oil content and soil temperature was found, which suggests that oil accumulation in oilseed crops was not affected significantly by the soil temperature as an independent variable.

Performance Evaluation of Grain Yield and Yield Related Traits in Common bean Genotypes at Yabello and Abaya, Southern Ethiopia

1970 ◽  
Vol 3 ◽  
pp. 28-34
Author(s):  
Ejigu Ejara, Wassu Mohammed, Berhanu Amsalu ◽  
Zinash Misgana, Mulatu Gabisa, Ganane Tasama
Keyword(s):  
Grain Yield ◽  
Common Bean ◽  
Agronomic Traits ◽  
Southern Ethiopia ◽  
Design Data ◽  
Nutrition Security ◽  
Lattice Design ◽  
Food And Nutrition ◽  
Borana Zone ◽  
Home Consumption

Common bean is among the major crops grown in southern Ethiopia including Borana zone where the majority of the farmers are Agro-pastoralist and produce the crop mainly for home consumption. The area has potential to the production of common bean for food and nutrition security as well as export commodity. However, scarcity of varieties that fit to the environment is one of the major constraints of production. Therefore, this experiment was conducted to evaluate 36 common bean genotypes including seven released varieties to evaluate performance of genotypes for yield and agronomic traits. The field experiment was conducted in 2015 at two locations (Abaya and Yabello) and genotypes were planted in triple lattice design. Data were collected on yield and important agronomic traits. Analysis of variance computed for individual locations and combined analysis over locations revealed significant variations among genotypes for all traits. Moreover, 16.67% of the genotypes had mean grain yield greater than the best performing released variety across locations and the genotypes showed a grain yield as high as 3.25 tons ha-1. Based on results of this study it is recommended to test the high yielding and early maturing genotypes at many locations to develop preferred varieties across many locations.

Sign in / Sign up

Export Citation Format

Share Document