Planting Date Affects Survival and Height Growth of Hybrid Poplar

1986 ◽  
Vol 62 (3) ◽  
pp. 164-169 ◽  
Author(s):  
Edward A. Hansen
Keyword(s):  
Hybrid Poplar ◽  
Late Summer ◽  
Growing Season ◽  
Climatic Conditions ◽  
Planting Date ◽  
Planting Dates ◽  
Soil Frost ◽  
Growing Seasons ◽  
Poplar Cuttings ◽  
Energy Plantations

In this study I investigated the effects of planting date for soaked versus unsoaked cuttings of two hybrid poplar clones under irrigated versus unirrigated and weedy versus weed-free conditions. Cuttings were planted each year for 4 years. Survival at the end of the first growing season was generally greater than 90% for all planting dates. At the end of the second growing season survival for trees planted before July 16 was again generally more than 90%. However, cuttings planted from July 30 through August 27 showed a major decline in survival and survival of fall planted cuttings ranged from 6 to 90%. Mortality of late summer- or fall-planted cuttings occurred prior to the beginning of the second growing season and was attributed to frost heaving. The tallest trees were not those planted at the earliest possible dates (April in Rhinelander). Instead, the tallest trees at the end of the first and second growing seasons were those planted in early- and mid-May. This optimum planting period was the same regardless of clone, soaking, irrigation, or weed treatment. Actual optimum planting date would change with location and local climatic conditions. Some climatic indices may prove more universal in predicting when to plant. Although tentative, it appears that for best growth, unrooted hybrid poplar cuttings should be planted in soil warmer than 10 °C. Trees do not grow as well if planted immediately after soil frost leaves the ground. Key words: Energy plantations, plantation establishment, woody biomass, intensive culture, Populus.

scholarly journals Impact of Row Spacing and Planting Date on the Canopy Environment, Abundance of Lesser Cornstalk Borer and Other Arthropods, and Incidence of Aflatoxigenic Fungi in Peanuts

1997 ◽  
Vol 24 (1) ◽  
pp. 52-59
Author(s):  
S. D. Stewart ◽  
K. L. Boweri ◽  
T. P. Mack ◽  
J. H. Edwards
Keyword(s):  
Climatic Conditions ◽  
Planting Date ◽  
Row Spacing ◽  
Planting Dates ◽  
Canopy Development ◽  
Late Planting ◽  
Elasmopalpus Lignosellus ◽  
Soil Temperatures ◽  
Lepidoptera Pyralidae ◽  
Wide Row Spacing

Abstract Three row spacings and two planting dates for peanuts, Arachis hypogaea L., were examined in 1993 and 1994 to determine the influence of the canopy environment on lesser cornstalk borer, Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae), other arthropods, and alflatoxigenic fungi. Climatically, 1993 and 1994 were disparate years. Decreasing row spacing increased relative leaf area and light interception by the canopy but, compared to difference between planting dates or years, had a relatively small impact on soil temperatures and relative humidity within the canopy. Late planting produced smaller plants, retarded canopy development, and reduced yield in both years, but especially in 1993 when it was hot and dry. The wide row spacing did not yield as well as twin and normal row spacings in either year. Lesser cornstalk borer damage and aflatoxin concentration were higher in the late planting than in the early planting of 1993, but were unaffected by row spacing. Fewer predatory arthropods were caught as row spacing decreased in both beat and pitfall samples, but planting date had variable effects. Prevailing climatic conditions and planting date appeared to be more important in influencing the canopy environment and pest densities than was row spacing.

Seasonal changes in forage nutritive value of common weeds encountered in Missouri pastures

2019 ◽  
Vol 34 (2) ◽  
pp. 164-171
Author(s):  
Gatlin Bunton ◽  
Zach Trower ◽  
Craig Roberts ◽  
Kevin W. Bradley
Keyword(s):  
Tall Fescue ◽  
Crude Protein ◽  
Nutritive Value ◽  
Late Summer ◽  
Growing Season ◽  
Quality Parameter ◽  
Neutral Detergent Fiber ◽  
Weed Species ◽  
Growing Seasons

AbstractDuring the 2015, 2016, and 2017 growing seasons, weed and weed-free mixed tall fescue and legume forage samples were harvested from 29 pastures throughout Missouri for investigation of the nutritive value of 20 common pasture weed species throughout the season. At certain times during the growing season, many broadleaf weed species had greater nutritive values for a given quality parameter as compared with the available weed-free, mixed tall fescue and legume forage harvested from the same location. There were no significant differences in crude protein concentration between the weed-free forage and many weeds throughout the growing season. However, crude protein content of common burdock, common cocklebur, common ragweed, dandelion, horsenettle, and lanceleaf ragweed was greater than that of the corresponding forage sample at multiple collection periods. The digestible neutral detergent fiber (dNDF) content of all broadleaf weeds except lanceleaf ragweed was significantly lower than that of the weed-free forage at all collection periods. Conversely, large crabgrass had significantly greater digestible neutral detergent fiber levels than did the mixed tall fescue forage at all sampling dates. Dandelion and spiny amaranth had greater in vitro true digestibility (IVTD) content than did the forage for the entire growing season. Three perennial weeds—horsenettle, vervains, and late boneset—did not differ in IVTD levels as compared with the mixed tall fescue and legume forage at any collection date. For most summer annual weeds, the trend was toward greater digestibility earlier in the season, with a gradual decline and often lower IVTD by the late summer or early fall. The results of this study will enable producers to make more informed management decisions about the potential benefit or detriment a weed may provide to the overall nutritive value of the pasture system.

RESPONSES TO PLANTING DATE AND POPULATION DENSITY BY EARLY-MATURING SORGHUM HYBRIDS IN ONTARIO

1981 ◽  
Vol 61 (2) ◽  
pp. 265-273
Author(s):  
D. J. HUME ◽  
YILMA KEBEDE
Keyword(s):  
Plant Density ◽  
Late Summer ◽  
Hybrid Plant ◽  
Planting Date ◽  
Planting Dates ◽  
Grain Yields ◽  
South Central ◽  
Early Maturing ◽  
Plant Densities ◽  
Sorghum Grain

Early-maturing grain sorghum (Sorghum bicolor (L.) Moench) hybrids which have potential usefulness in southern Ontario are commercially available. One such hybrid, Pride P130, and two experimental hybrids, Pride X4043 and Pride X3160, were grown at three planting dates and three plant densities in 1975 and 1976 at Elora, Ontario. There were several hybrid × planting date and hybrid × plant density interactions for the development and yield parameters measured. However, grain yields of all hybrids decreased by about 10% per week when plantings were delayed 2 or 4 wk after mid-May in 1975. In 1976, yields declined even more after late planting. Increasing populations from 75 000 to 300 000 plants/ha in 1975 increased grain yields from 4.3 to 6.0 t/ha, averaged over hybrids and planting dates. In 1976, raising populations from 150 000 to 450 000 plants/ha increased average yields from 3.2 to 3.7 t/ha. P130 was the earliest and best-yielding hybrid in both years. In 1975, which had a warm May and near-average temperatures, the best treatment yielded 7.3 t grain/ha and hybrids at all planting dates matured. The best treatment approached grain corn (Zea mays L.) yields. In 1976 with a cool spring and late summer, the highest grain yield was 5.7 t/ha with early planting, but 11 June plantings did not mature. In south-central Ontario, sorghum grain yields appear less reliable than those of corn.

scholarly journals Dormant Sprigging of Bermudagrass and Zoysiagrass

2021 ◽  
pp. 1-10
Author(s):  
Juming Zhang ◽  
Michael Richardson ◽  
Douglas Karcher ◽  
John McCalla ◽  
Jingwen Mai ◽  
...  
Keyword(s):  
Field Study ◽  
Cynodon Dactylon ◽  
Growing Season ◽  
Early Summer ◽  
Planting Date ◽  
Late Spring ◽  
Zoysia Japonica ◽  
Planting Dates ◽  
Dormant Season ◽  
Sod Production

Many bermudagrass (Cynodon sp.) and zoysiagrass (Zoysia sp.) cultivars are not available as seed and are commonly planted vegetatively using sprigs, especially for sod production or in sand-based systems. Sprig planting is typically done in late spring or early summer, but this can result in an extended grow-in period and delay the use of the turf in the first growing season. The objective of this study was to determine if sprigs of bermudagrass and zoysiagrass could be planted earlier in the year, during the dormancy phase, to hasten establishment. A field study was carried out in Fayetteville, AR, in 2014 and 2016 using ‘Tifway’ hybrid bermudagrass (Cynodon dactylon × Cynodon transvaalensis) and ‘Meyer’ zoysiagrass (Zoysia japonica), and in Guangzhou, China, in 2015, using ‘Tifway’ hybrid bermudagrass and ‘Lanyin III’ zoysiagrass (Z. japonica). Sprigs were planted in March (dormant), May (spring) and July (summer) in Fayetteville, and in January (dormant), March (spring) and May (summer) in Guangzhou. Sprigging rates of 30, 60, and 90 m3·ha−1 were tested at both locations and across all planting dates. Bermudagrass was less affected by planting date, with dormant, spring or summer plantings effectively establishing full cover in the first growing season. Zoysiagrass that was sprigged in the dormant season was successfully established by the end of the first growing season while a full zoysiagrass cover was not achieved with either spring or summer plantings in Arkansas. Dormant sprigging reached full coverage as fast or faster than traditional spring or summer planting dates at both locations, indicating that bermudagrass and zoysiagrass establishment can be achieved earlier in the growing season using dormant sprigging methods.

scholarly journals Occurrence and intensity of more important fungal diseases on soybean (Glycine max (L.) Merrill) cultivars

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 590-592
Author(s):  
T. Duvnjak ◽  
M. Vrataric ◽  
A. Sudaric ◽  
J. Cosic
Keyword(s):  
Genetic Diversity ◽  
Downy Mildew ◽  
Disease Incidence ◽  
Stem Canker ◽  
Climatic Conditions ◽  
Planting Date ◽  
Fungal Diseases ◽  
Stem Blight ◽  
Growing Seasons ◽  
Glycine Max L

The main objective of this study was to determinate the occurrence and intensity of attack by the more important fungal diseases on soybean in Eastern Croatia. Four-year investigation (1998–2001) was undertaken on 10 domestic soybean cultivars with different level of disease resistance. The investigation was set in two planting date (optimal and delayed) on experimental fields of the Agricultural Institute Osijek. Following more important diseases were established: Downy mildew, Pod and stem blight and Stem canker. Significant differences in disease incidence were caused by genetic diversity of tested materials as well as different climatic conditions among growing seasons. According to planting date, significantly higher incidence of Downy mildew and Pod and stem blight was in optimal planting date.

Effet de la date de semis sur la productivité du lin oléagineux cultivé en climat frais

2011 ◽  
Vol 91 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Denis Pageau ◽  
Julie Lajeunesse
Keyword(s):  
Growing Season ◽  
Planting Date ◽  
Planting Dates ◽  
Grain Yields ◽  
Linum Usitatissimum L ◽  
Seeding Date ◽  
Sowing Dates ◽  
1000 Grain Weight ◽  
Late Sowing ◽  
Cool Climate

Pageau, D. and Lajeunesse, J. 2011. Effect of seeding date on oilseed flax grown in a cool climate. Can. J. Plant Sci. 91: 29–35. In Quebec, the growing season is relatively short and most crops are sown early in the spring. However, flax (Linum usitatissimum L.) production is recent in Quebec and the effect of time of seeding on flax productivity has not yet been studied. The objective of this project was to determine the effect of four different sowing dates on the productivity of oilseed flax grown in a cool climate in Quebec. Four planting dates (mid-May to mid-June) were evaluated for 4 yr (2004, 2006, 2007 and 2008) with four cultivars (AC Emerson, AC McDuff, CDC Bethune and Lightning). During 2 yr, delays in seeding reduced grain yields. Moreover, in 2006 and 2007, flax seeded at the last planting date (mid-June) did not reach maturity. Compared with the earliest seeding date, a 2-wk delay in sowing reduced grain yields by 34 to 42% in 2006 and by 25 to 51% in 2007. Late sowing also reduced the oil content and 1000-grain weight of flax. These results indicate that oilseed flax should be sown early (11–18 May) in regions where the climate is cool.

scholarly journals Vegetation Management Using Polyethylene Mulch Mats and Glyphosate Herbicide in a Coastal British Columbia Hybrid Poplar Plantation: Four-Year Growth Response

2001 ◽  
Vol 16 (1) ◽  
pp. 26-30 ◽  
Author(s):  
K.D. Thomas ◽  
W.J. Reid ◽  
P.G. Comeau
Keyword(s):  
British Columbia ◽  
Hybrid Poplar ◽  
Basal Area ◽  
Growing Season ◽  
Growth And Yield ◽  
Hybrid Poplars ◽  
Growing Seasons ◽  
Herbicide Treatment ◽  
Glyphosate Herbicide ◽  
Coastal British Columbia

Abstract This study was initiated in 1995 to gather information on the effectiveness of opaque polyethylene mats and glyphosate herbicide treatment on growth and yield of hybrid poplar plantations on south coastal British Columbia. Immediately after planting 40 cm tall hybrid poplar cuttings, 60 × 60 cm opaque polyethylene mats were installed. All treatment plots were mechanically cultivated in one direction twice yearly from 1995 to 1997. This practice left an uncultivated strip between trees running in the same direction as the cultivation. The uncultivated strip was approximately 1 m wide, and represented approximately one-third (0.04 ha) of the total plot area (0.13 ha). Glyphosate was applied at a rate of 2.1 kg active ingredient (ai)/ha in water to the uncultivated strips in the herbicide treatment plots in midsummer of the second and third growing seasons. The opaque polyethylene mats significantly improved poplar height growth only for the first growing season. After four growing seasons, hybrid poplars treated with glyphosate were significantly taller (983 cm) than those in either the mat (915 cm) or control treated plots (902 cm). Diameter at breast height (dbh) was also significantly greater in the herbicide treated plots (88 mm) than in either the mat (78 mm) or control (77 mm) treated plots. Total volume was also significantly greater in herbicide plots (23 ³/ha) than in either the mat (17 m³/ha) or control (17 m³/ha) plots. Basal area and total volume were 14% and 37%, respectively, greater in the herbicide plots than in the mat and control plots following the fourth growing season. West. J. Appl. For. 16(1):26–30.

scholarly journals Morphophysiological aspects of ornamental sunflowers cultivated in different growing seasons under semi-arid conditions

2022 ◽  
Vol 26 (4) ◽  
pp. 299-305
Author(s):  
Sheila D. P. da Silva ◽  
Gracielle P. de Souza ◽  
Agnaldo R. de M. Chaves ◽  
Marcelle A. da Silva ◽  
Rafaela R. de Souza ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Arid Regions ◽  
Block Design ◽  
Growing Season ◽  
Climatic Conditions ◽  
Growing Seasons ◽  
Arid Conditions ◽  
Randomized Block Design ◽  
Leaf Surface Area ◽  
Semi Arid

ABSTRACT Knowledge of how climatic conditions affect plant morphophysiology is essential for understanding how to manage the growth cycles of different crops. The aim of this study was to evaluate the effects of the growing seasons in a semi-arid area on the morphophysiological variables of ornamental sunflower plants. The experiment was carried out in a randomized block design in a split-plot arrangement with four replicates. Six cultivars (‘Bonito de Outono Sortido’, ‘Sol Noturno’, ‘Sol Vermelho’, ‘Jardim Amarelo Alto’, ‘Girassol F1 Sunbright Supreme’ and ‘Girassol F1 Vincents Choice’) were evaluated in the main plots and two different growing seasons (GS) in the subplots (GS1 - warm climate and GS2 - mild climate). Evaluations of gas exchange, chlorophyll indices, and leaf surface area were carried out at the reproductive stage (R5.5). The cultivation of ornamental sunflowers in semi-arid regions was significantly affected by the growing season. Changes in gas exchange variables and the morphophysiology of ornamental sunflower plants in the two growing seasons reflected the high phenotypic plasticity characteristic of this species. The cultivation of ornamental sunflowers under semi-arid conditions in the growing season, when air temperature and solar radiation are high, could be limited due to elevated transpiration rates. Therefore, it is recommended that they are grown mainly during the moderate climatic season in semi-arid regions.

scholarly journals Molecular diagnosis of phytoplasma infection in some Moldavian tomato varieties

2020 ◽  
pp. 88-92
Author(s):  
A. G. Bahsiev ◽  
I. A. Zamorzaeva ◽  
N. I. Mihnea
Keyword(s):  
Molecular Diagnosis ◽  
Plant Protection ◽  
Growing Season ◽  
Environmental Safety ◽  
Climatic Conditions ◽  
Wild Form ◽  
Solanum Habrochaites ◽  
Growing Seasons ◽  
Tomato Field ◽  
Phytoplasma Infection

Relevance. The use of molecular methods allows reliable and fast determination of the resistance of genotypes (varieties) to pathogens, thereby reducing possible product losses and, at the same time, maintaining its environmental safety. It is very important in conditions of increasing demand for high-quality agricultural production. Aim: Using molecular diagnosis of ʹCandidatus Phytoplasma solaniʹ to compare the degree of infection in some Moldavian tomato varieties at different stages of plant development.Material and methods. The molecular analysis (nested-PCR) of plants of the four Moldavian tomato varieties (Elvira, Cerasus, Mary Gratefully, Desteptarea) created at the Institute of Genetics, Physiology and Plant Protection, and the wild formSolanum habrochaites, was carried out for the presence of the phytopathogen ʹCa. P. solaniʹ. Researches were made during two growing seasons. Results. The distribution of infection between the studied varieties was different in the process of plants development. The spread of infection in the tomato field was recorded under the climatic conditions of two growing seasons: the season of 2018, which was hot but with normal rains in the middle of summer, and the season of 2019, in conditions of a very hot and dry summer. During both seasons, Cerasus variety manifested the highest resistance to ʹCa. P. solaniʹ infection.  A little more than half of plants of this variety were affected by stolbur only at the end of the growing season, after harvesting most of the crop. Varieties Elvira and Desteptarea had similar levels of infection of plants with phytoplasma during two years of research. These varieties manifested a higher sensitivity to phytoplasma infection compared with Cerasus. Mary Gratefully was the genotype with the highest dependence of the sensitivity toʹCa. P. solaniʹ infection from the climatic conditions of the growing season. Plants of the wild form Solanum habrochaites demonstrated complete immunity to phytoplasma infection during the growing season. Conclusion.The Cerasus variety, as well as the wild form Solanum habrochaites, can be recommended for including in breeding programs for the creating tomato varieties or hybrids resistant to phytoplasma. Thus, molecular diagnosis may be a useful tool for the breeding resistant genotypes. 

scholarly journals PLANTING DATE EFFECT ON PIGEONPEA DEVELOPMENT IN MID-MISSOURI

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 494g-495
Author(s):  
Lurline Marsh ◽  
Mohsen Dkhili
Keyword(s):  
Field Study ◽  
Temperature Region ◽  
Cajanus Cajan ◽  
Growth And Development ◽  
Growing Season ◽  
Planting Date ◽  
Planting Dates ◽  
Pod Length ◽  
Number Of Seeds ◽  
Short Growing Season

Determinate, photoperiod-insensitive genotypes of pigeonpea, (Cajanus cajan) have the potential for production in the short growing season of the temperature region. A field study was conducted to determine the effect of three planting dates on the growth and development of this crop in Missouri. Seeds of four genotypes, ICPL 87 Isolation (85k), ICPL 85010, ICPL 85024 and ICPL 8304 were planted at three planting dates in 1990, May 1, May 15 and May 31. Germination of the earliest planted seeds was low but increased in the later planted ones. The earlier the planting date the longer was the time to flowering, but the earlier was pod maturity. The earliest planted group flowered within 78-110 days after planting. The genotypes in this group produced the highest fresh pod weights of 330-730 g/plant and the latest planted ones produced the least. Pod length, the number of seeds per pod and weight of 100 seeds had ranges of 5.1-5.9 cm, 3-4 seeds and 17-23 g, respectively and were unaffected by planting dates.

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