The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
R. W. Hammon - One of the best experts on this subject based on the ideXlab platform.
-
Production of hybrid poplar under short-term, Intensive Culture in
2020Co-Authors: Western Colorado, Calvin H. Pearson, R. D. Moench, R. W. HammonAbstract:An irrigated study was conducted at the Western Colorado Research Center at Fruita for 6 years to evaluate eight hybrid poplar clones under short-term, Intensive Culture. The eight clones included in the study were Populus nigra x P. maximowiczii (NM6), P. trichocarpa x P. deltoides (52225, OP367), and P. deltoides x P. nigra (Norway, Noreaster, Raverdaus, 14274, 14272). Data were collected for growth, aerial biomass yield, dry matter partitioning, carbon sequestration, and insect and disease infestation. OP367 and 52225 consistently had larger tree diameters than other hybrids for each of the 6 years. Averaged across clones, yield was 58.4 Mg ha −1 . OP367 had the highest yield at 72.2 Mg ha −1 and 14274 had the lowest yield at 41.0 Mg ha −1 . The yield of OP367 was 1.8 times greater than that of 14274. Carbon yield over the 6 years of testing was highest for OP367 at 33.4 Mg C ha−1 and lowest for 14274 at 18.8 Mg C ha−1. Of the eight clones tested, OP367 was the most adapted and productive clone in this short-term, Intensive Culture system in the arid environment of the Grand Valley of western Colorado as evidenced by its productive growth, yield, insect resistance, winterhardiness, and tree architecture. Several insect species infested the poplar clones over the course of the rotation. Best management practices for growers who produce hybrid poplar under short-term, Intensive Culture should include the following: (1) plant highly productive clones, (2) poplar clones with suitable tree architecture for production and market objectives should be used, (3) if carbon sequestration is an important production objective, plant a suitable clone, (4) some poplar clones develop chlorosis when planted in high pH soils and should be avoided, and (5) use poplar clones that have been shown to exhibit resistance to specific insect species.
-
production of hybrid poplar under short term Intensive Culture in western colorado
Industrial Crops and Products, 2010Co-Authors: Calvin H. Pearson, R. D. Moench, A D Halvorson, R. W. HammonAbstract:Abstract An irrigated study was conducted at the Western Colorado Research Center at Fruita for 6 years to evaluate eight hybrid poplar clones under short-term, Intensive Culture. The eight clones included in the study were Populus nigra x P. maximowiczii (NM6), P. trichocarpa x P. deltoides (52225, OP367), and P. deltoides x P. nigra (Norway, Noreaster, Raverdaus, 14274, 14272). Data were collected for growth, aerial biomass yield, dry matter partitioning, carbon sequestration, and insect and disease infestation. OP367 and 52225 consistently had larger tree diameters than other hybrids for each of the 6 years. Averaged across clones, yield was 58.4 Mg ha−1. OP367 had the highest yield at 72.2 Mg ha−1 and 14274 had the lowest yield at 41.0 Mg ha−1. The yield of OP367 was 1.8 times greater than that of 14274. Carbon yield over the 6 years of testing was highest for OP367 at 33.4 Mg C ha−1 and lowest for 14274 at 18.8 Mg C ha−1. Of the eight clones tested, OP367 was the most adapted and productive clone in this short-term, Intensive Culture system in the arid environment of the Grand Valley of western Colorado as evidenced by its productive growth, yield, insect resistance, winterhardiness, and tree architecture. Several insect species infested the poplar clones over the course of the rotation. Best management practices for growers who produce hybrid poplar under short-term, Intensive Culture should include the following: (1) plant highly productive clones, (2) poplar clones with suitable tree architecture for production and market objectives should be used, (3) if carbon sequestration is an important production objective, plant a suitable clone, (4) some poplar clones develop chlorosis when planted in high pH soils and should be avoided, and (5) use poplar clones that have been shown to exhibit resistance to specific insect species.
Craig L Browdy - One of the best experts on this subject based on the ideXlab platform.
-
effect of natural production in a zero exchange suspended microbial floc based super Intensive Culture system for white shrimp litopenaeus vannamei
Aquaculture, 2006Co-Authors: Wilson Wasielesky, Heidi L Atwood, Al Stokes, Craig L BrowdyAbstract:Zero water exchange, super-Intensive Culture of shrimp in enclosed raceway type systems can be considered environmentally friendly in that containment of water within the system prevents potential spread of disease between the wild populations and Cultured animals and avoids nutrient rich waste from polluting coastal waters. However, as a relatively new strategy for shrimp production, there is much still to be learned about the potential biological and economic benefits of producing shrimp in suspended microbial floc based systems. Understanding shrimp feeding behavior and quantification of shrimp feed consumption provides valuable information for culturists to improve feed management, one of the keys to economic viability. The objective of this study was to evaluate the nutritional contribution of varying levels of microalgae/bacterial floc on survival, growth, food consumption, and FCR of Litopenaeus vannamei juveniles fed diets with different protein levels in replicated experimental microcosm tanks. The 20 day experiment evaluated 9 treatments, three water types fed three different protein diets. Water was recirculated within a sump and consisted of either clear, UV filtered water, water containing microbial floc from an adjacent zero exchange super-Intensive raceway production unit, or a 50:50 mix of clear water and raceway water. Diet treatments were either no food, 25% or 35% protein content. Treatments were randomly assigned to 50 L, mesh covered plastic bins receiving each water type. Each treatment consisted of five replicates, each containing 44 shrimp, with a mean stocking weight of 1.82±0.71 g for a final density of 300 per m 2 . Shrimp in each treatment (except the no feed treatment) were fed 3 times daily via a specially designed feed tray. Food consumption and FCR were calculated based on weight gain, survival, total consumed feed, feed loss through leaching, and initial feed moisture content. Results were analyzed by two-way analysis of variance (ANOVA) and differences between the means analyzed by Tukey's test (α=0.05). Survival in the fed treatments was greater than 98% in all treatments (P>0.05). Survival in the non-fed treatments was significantly higher in the raceway water treatments than in the clear water treatment (P<0.05). Final weight, weight gain, final biomass, food consumption and FCR were significantly higher (P<0.05) in all treatments fed with 35% protein feed. This result suggests a positive relationship between the growth parameters and the protein content of the feeds in this system, and confirms the benefit of natural productivity for production of L. vannamei.
Tianwen Zhang - One of the best experts on this subject based on the ideXlab platform.
-
effects of carbohydrate addition on litopenaeus vannamei Intensive Culture in a zero water exchange system
Aquaculture, 2012Co-Authors: Hongwei Shan, Tianwen ZhangAbstract:Abstract The present study investigated the effects of carbohydrate addition on the water quality, carbon/nitrogen ratios, densities of total bacteria, nitrogen cycle bacteria and zooplankton, and shrimp growth performance in a zero-water exchange system for Litopenaeus vannamei Intensive Culture. Sucrose was added as the carbohydrate into the water at five levels, i.e., 0, 25%, 50%, 75% and 100% of the theoretical adding quantity. Our results demonstrated that carbohydrate addition, especially 75% and 100% of the theoretical quantity significantly reduced the concentrations of total ammonia nitrogen and nitrite nitrogen during the late Culture period in the water ( P P P L . vannamei Culture. Conclusively, carbohydrate addition into zero-water exchange systems for L . vannamei Intensive Culture can effectively improve the water quality, bacterial activities and zooplankton growth, consequently resulting in the better growth performance.
Stephane Daigle - One of the best experts on this subject based on the ideXlab platform.
-
early performance and nutrition of two willow species in short rotation Intensive Culture fertilized with wastewater sludge and impact on the soil characteristics
Canadian Journal of Forest Research, 1998Co-Authors: Michel Labrecque, Traian I Teodorescu, Stephane DaigleAbstract:Recycling wastewater sludge as fertilizer in short-rotation Intensive Culture of willows offers a viable opportunity to increase biomass productivity. Salix discolor Muhl. and Salix viminalis L. were planted at two densities (20 000 and 30 000 cuttings/ha), on two sites: a well and a poorly drained site. Three doses of dried and granulated sludge (100, 200, 300, and 0 kg/ha of "available" N) were applied in the spring of the first and the second seasons of growth. The aims of the experiment were to (i) investigate growth and nutritional plant response to fertilization and (ii) estimate the impact of sludge application on the soil. Over two seasons, aboveground biomass was similar for S. discolor and S. viminalis on both sites and for all sludge treatments. Every increment in the sludge dose applied induced an increase in willow productivity. Vector analysis of stem and branch nutrient concentration suggested that nitrogen was the most limiting nutrient. At the end of the second season, plots fertilized wi...
-
Early performance and nutrition of two willow species in short-rotation Intensive Culture fertilized with wastewater sludge and impact on
1998Co-Authors: Michel Labrecque, Traian I Teodorescu, Stephane DaigleAbstract:Recycling wastewater sludge as fertilizer in short-rotation Intensive Culture of willows offers a viable opportunity to increase biomass productivity. Salix discolor Muhl. and Salix viminalis L. were planted at two densities (20 000 and 30 000 cuttings/ha), on two sites: a well and a poorly drained site. Three doses of dried and granulated sludge (100, 200, 300, and 0 kg/ha of "available" N) were applied in the spring of the first and the second seasons of growth. The aims of the experiment were to (i) investigate growth and nutritional plant response to fertilization and (ii) estimate the impact of sludge application on the soil. Over two seasons, aboveground biomass was similar for S. discolor and S. viminalis on both sites and for all sludge treatments. Every increment in the sludge dose applied induced an increase in willow productivity. Vector analysis of stem and branch nutrient concentration suggested that nitrogen was the most limiting nutrient. At the end of the second season, plots fertilized with the highest doses of sludge indicated soil enrichment in organic matter. However, nitrate concentration in the soil increased with increasing sludge doses. The accumulation of heavy metals from sludge was not hazardous to the environment according to provincial limits. A moderate dose of dried and pelleted sludge (100 kg/ha "available" N) may reduce nitrate leaching and appears to be a good fertilizer during the establishment of willows. Resume : Le recyclage des boues usees comme fertilisant dans la Culture Intensive avec de courtes rotations du saule peut etre envisage comme un moyen pour accroitre la productivite de cette essence. Des boutures de Salix discolor
-
impact of herbaceous competition and drainage conditions on the early productivity of willows under short rotation Intensive Culture
Canadian Journal of Forest Research, 1994Co-Authors: Michel Labrecque, Traian I Teodorescu, Patrice Babeux, Alain Cogliastro, Stephane DaigleAbstract:The productivity of trees under short-rotation Intensive Culture is influenced by herbaceous competition and drainage conditions. During the first year of establishment of Salixdiscolor Muhl. and Salixviminalis L., four weed-suppression treatments were applied to two sites showing different drainage conditions, one well drained and the other is poorly drained. On the well-drained site, the productivity of the trees increased in all the plots under treatment, whereas on the poorly drained site, only the use of a plastic mulch increased the biomass production. The mean productivity on the well-drained site was always superior to the productivity measured on the poorly drained site except when the vegetation was controlled by the use of a plastic mulch. The analyses related to nutrition revealed that the trees on the well-drained site absorbed more nutrients than those on the poorly drained site. Salixdiscolor showed a higher uptake of potassium and S. viminalis, a higher concentration of calcium. Our result...
Calvin H. Pearson - One of the best experts on this subject based on the ideXlab platform.
-
Production of hybrid poplar under short-term, Intensive Culture in
2020Co-Authors: Western Colorado, Calvin H. Pearson, R. D. Moench, R. W. HammonAbstract:An irrigated study was conducted at the Western Colorado Research Center at Fruita for 6 years to evaluate eight hybrid poplar clones under short-term, Intensive Culture. The eight clones included in the study were Populus nigra x P. maximowiczii (NM6), P. trichocarpa x P. deltoides (52225, OP367), and P. deltoides x P. nigra (Norway, Noreaster, Raverdaus, 14274, 14272). Data were collected for growth, aerial biomass yield, dry matter partitioning, carbon sequestration, and insect and disease infestation. OP367 and 52225 consistently had larger tree diameters than other hybrids for each of the 6 years. Averaged across clones, yield was 58.4 Mg ha −1 . OP367 had the highest yield at 72.2 Mg ha −1 and 14274 had the lowest yield at 41.0 Mg ha −1 . The yield of OP367 was 1.8 times greater than that of 14274. Carbon yield over the 6 years of testing was highest for OP367 at 33.4 Mg C ha−1 and lowest for 14274 at 18.8 Mg C ha−1. Of the eight clones tested, OP367 was the most adapted and productive clone in this short-term, Intensive Culture system in the arid environment of the Grand Valley of western Colorado as evidenced by its productive growth, yield, insect resistance, winterhardiness, and tree architecture. Several insect species infested the poplar clones over the course of the rotation. Best management practices for growers who produce hybrid poplar under short-term, Intensive Culture should include the following: (1) plant highly productive clones, (2) poplar clones with suitable tree architecture for production and market objectives should be used, (3) if carbon sequestration is an important production objective, plant a suitable clone, (4) some poplar clones develop chlorosis when planted in high pH soils and should be avoided, and (5) use poplar clones that have been shown to exhibit resistance to specific insect species.
-
production of hybrid poplar under short term Intensive Culture in western colorado
Industrial Crops and Products, 2010Co-Authors: Calvin H. Pearson, R. D. Moench, A D Halvorson, R. W. HammonAbstract:Abstract An irrigated study was conducted at the Western Colorado Research Center at Fruita for 6 years to evaluate eight hybrid poplar clones under short-term, Intensive Culture. The eight clones included in the study were Populus nigra x P. maximowiczii (NM6), P. trichocarpa x P. deltoides (52225, OP367), and P. deltoides x P. nigra (Norway, Noreaster, Raverdaus, 14274, 14272). Data were collected for growth, aerial biomass yield, dry matter partitioning, carbon sequestration, and insect and disease infestation. OP367 and 52225 consistently had larger tree diameters than other hybrids for each of the 6 years. Averaged across clones, yield was 58.4 Mg ha−1. OP367 had the highest yield at 72.2 Mg ha−1 and 14274 had the lowest yield at 41.0 Mg ha−1. The yield of OP367 was 1.8 times greater than that of 14274. Carbon yield over the 6 years of testing was highest for OP367 at 33.4 Mg C ha−1 and lowest for 14274 at 18.8 Mg C ha−1. Of the eight clones tested, OP367 was the most adapted and productive clone in this short-term, Intensive Culture system in the arid environment of the Grand Valley of western Colorado as evidenced by its productive growth, yield, insect resistance, winterhardiness, and tree architecture. Several insect species infested the poplar clones over the course of the rotation. Best management practices for growers who produce hybrid poplar under short-term, Intensive Culture should include the following: (1) plant highly productive clones, (2) poplar clones with suitable tree architecture for production and market objectives should be used, (3) if carbon sequestration is an important production objective, plant a suitable clone, (4) some poplar clones develop chlorosis when planted in high pH soils and should be avoided, and (5) use poplar clones that have been shown to exhibit resistance to specific insect species.