Cultivation and weed control for aspen seedling establishment in the southern Rocky Mountains

1987 ◽  
Vol 17 (1) ◽  
pp. 47-50 ◽  
Author(s):  
James T. Fisher ◽  
Robert W. Neumann
Keyword(s):  
New Mexico ◽  
Weed Control ◽  
Seedling Establishment ◽  
Rocky Mountains ◽  
Seedling Survival ◽  
High Elevation ◽  
Southern Rocky Mountains ◽  
Weed Cover ◽  
Southern Site ◽  
Survival And Growth

Containerized aspen (Populustremuloides Michx.) seedlings were planted at high-elevation sites in southern (May 1982) and northern (July 1983) New Mexico. Each plantation compared fall cultivation (20 cm depth), prior to planting the following spring or summer, with cultivation at the time of planting. Subtreatments of the tests included applications of the postemergent herbicide dalapon and the preemergents linuron, trifluralin, or simazine applied 2 to 3 weeks before planting. First season survival exceeded 75% for the best treatment at each site. Cultivation, in general, effectively reduced weed cover and improved seedling success. Fall cultivation, in particular, improved seedling survival and growth only at the relatively dry southern site. Except for spring-cultivated plots in the south, some herbicide applications improved weed control and seedling performance over cultivation alone. The combination of fall cultivation plus trifluralin is considered the best site preparatory treatment tested.

Soil moisture strongly limits Douglas-fir seedling establishment near its upper elevational limit in the southern Rocky Mountains

2020 ◽  
Vol 50 (8) ◽  
pp. 837-842 ◽  
Author(s):  
Alison C. Foster ◽  
Patrick H. Martin ◽  
Miranda D. Redmond
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Seedling Establishment ◽  
Rocky Mountains ◽  
Negative Impact ◽  
Seedling Survival ◽  
Douglas Fir ◽  
Southern Rocky Mountains ◽  
Precipitation Regimes ◽  
Maximum Temperatures

Climate change is causing significant shifts in tree species distributions to higher elevations and latitudes. Seed germination and seedling establishment are particularly important steps in tree range expansion under warmer conditions, yet seedling establishment is influenced by a range of factors beyond temperature, including herbivory, microenvironment, and the timing and amount of precipitation. We conducted an experiment to assess how augmented precipitation regimes, wildlife herbivory, and microclimate influence germination and first-season survival of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) near the upper elevational limit of its range in the southern Rocky Mountains. Germination was strongly influenced by moisture, with over three times higher germination in watered treatments. Seedling survival was similar across watered treatments but was negatively associated with microenvironments with higher maximum temperatures. These results indicate that soil moisture effects on germination and the negative impact of hot growing-season temperatures on seedling survival limit initial seedling establishment in Douglas-fir, even at the cooler and wetter end of its range, suggesting that the planting of this species will be most successful in cooler and wetter microsites. Taken together, this study suggests that continued warming and projected increases in droughts may strongly limit Douglas-fir regeneration and thus its ability to shift upwards with climate change.

scholarly journals Survival and Growth of Douglas-Fir Relating to Weeding, Fertilization, and Seed Source

1996 ◽  
Vol 11 (2) ◽  
pp. 62-69 ◽  
Author(s):  
Brian E. Roth ◽  
Michael Newton
Keyword(s):  
Weed Control ◽  
Nitrogen Fertilization ◽  
Seedling Survival ◽  
Seed Orchard ◽  
Douglas Fir ◽  
Seed Source ◽  
Interactive Effects ◽  
Dominant Factor ◽  
Local Source ◽  
Survival And Growth

Abstract The goal of this study was to quantitatively evaluate the individual and interactive effects of weed control, nitrogen fertilization, and seed source on Douglas-fir (Pseudotsuga menziesii) survival and growth in a range of sites and growing conditions in western Oregon. Weed control was the dominant factor influencing seedling survival and growth and accounted for 49% of the explained variation in seedling volume after 2 yr. Nitrogen fertilization had no effect when used in conjunction with weed control and a negative effect when used without weed control. Seedlings from a seed orchard source were significantly larger in diameter and volume than those from a wild local source after two growing seasons, but second-year heights were similar for the two seedling types. Initial seedling size was positively correlated with growth rate. West. J. Appl. For. 11(2):00-00.

The Southwest

2016 ◽  
Author(s):  
James Brooks
Keyword(s):  
New Mexico ◽  
Rocky Mountains ◽  
Rio Grande Valley ◽  
Rio Grande ◽  
Dual Process ◽  
Santa Fe ◽  
Place Making ◽  
Southern Rocky Mountains ◽  
San Juan River ◽  
New Locations

Few traveling between Santa Fe, New Mexico, and the Rio Grande valley realize that they are traversing one of the most significant American Indian migration and settlement corridors in the Southwest, a well-watered and fertile floodplain that served to link peoples of the southern Rocky Mountains and the San Juan River to those of the Jemez range and Sangre de Cristo Mountains, and the Rio Grande, across some 300 miles. This chapter gives an overview of Pueblo (Tiwa, Tewa, Towa, Keres, Hopi, and Zuni), Apache, Navajo, and O’odham histories, and reveals a dual process of migration and place making across a millennium. The Southwest has a high variability in seasonal precipitation, and its peoples have demonstrated creative and adaptable cultures that allowed for movement to new locations and the creation of new homelands as a crucial aspect of their survival.

Corn gluten meal—a natural preemergence herbicide: Effect on vegetable seedling survival and weed cover

2000 ◽  
Vol 15 (4) ◽  
pp. 189-191 ◽  
Author(s):  
Melissa C. McDade ◽  
Nick E. Christians
Keyword(s):  
Weed Control ◽  
Sweet Corn ◽  
Seedling Survival ◽  
Direct Seeding ◽  
Corn Gluten Meal ◽  
Corn Gluten ◽  
Weed Cover ◽  
Important Pest ◽  
Field Plots

AbstractWeeds are considered the most important pest group for farmers interested in lowering external inputs and avoiding synthetic chemical use. Corn gluten meal (CGM) is a natural preemergence weed control used in turfgrass, which reduces germination of many broadleaf and grass weeds. The objective of this study was to investigate weed cover and vegetable seedling survival in field plots when CGM is incorporated before planting. Three studies were conducted, with three replications for each study. Five rates of powdered CGM (0,100, 200, 300, and 400 g m–2) were weighed and incorporated into the top 5–8 cm of soil in recently disked 1.5-m by 2.7-m plots. Seeds of eight vegetables were each planted in rows 1.4 m long and 0.3 m apart. Seedling survival and percentage of weed cover were recorded for each plot. Corn gluten meal at rates of 100, 200, 300, and 400 g m–2reduced mean weed cover by 50, 74, 84, and 82%, respectively, compared with the control. Seedling survival at 100 g CGM per m2was reduced by 67% for ‘Comanche’ onion, 35% for ‘Ruby Queen’ beet, 41% for ‘Red Baron’ radish, 71% for ‘Provider’ bean, 73% for ‘Scarlet Nantes’ carrot, 59% for ‘Maestro’ pea, and 68% for ‘Black Seeded Simpson’ lettuce, compared with the control. Seedling survival for ‘Daybreak’ sweet corn was not reduced by rates of 100 or 200 g CGM per m2, but was reduced by 26% at a rate of 300 g CGM per m2compared with the control. Because of the reduction in seedling survival at even the lowest rate of CGM (100 g m–2), direct seeding of these vegetables into soil into which CGM has been incorporated is not advisable. Using transplants may be an alternative that takes advantage of the herbicidal effects of CGM and the nitrogen it provides.

Naturally acidic surface and ground waters draining porphyry-related mineralized areas of the Southern Rocky Mountains, Colorado and New Mexico

2009 ◽  
Vol 24 (2) ◽  
pp. 255-267 ◽  
Author(s):  
Philip L. Verplanck ◽  
D. Kirk Nordstrom ◽  
Dana J. Bove ◽  
Geoffrey S. Plumlee ◽  
Robert L. Runkel
Keyword(s):  
New Mexico ◽  
Rocky Mountains ◽  
Southern Rocky Mountains ◽  
Ground Waters

Magnetostratigraphy, age and depositional environment of the Lobo Formation, southwest New Mexico: implications for the Laramide orogeny in the southern Rocky Mountains

2016 ◽  
Vol 30 ◽  
pp. 401-423 ◽  
Author(s):  
Marie G. De los Santos ◽  
Timothy F. Lawton ◽  
Peter Copeland ◽  
Alexis Licht ◽  
Stuart A. Hall
Keyword(s):  
New Mexico ◽  
Rocky Mountains ◽  
Depositional Environment ◽  
Southern Rocky Mountains ◽  
Laramide Orogeny

Two new Gordionus species (Nematomorpha: Gordiida) from the southern Rocky Mountains (USA)

Zootaxa ◽  
2012 ◽  
Vol 3406 (1) ◽  
pp. 30 ◽  
Author(s):  
ALYSSA C. BEGAY ◽  
ANDREAS SCHMIDT-RHAESA ◽  
MATTHEW G. BOLEK ◽  
BEN HANELT
Keyword(s):  
United States ◽  
New Mexico ◽  
United States Of America ◽  
Rocky Mountains ◽  
The State ◽  
The Body ◽  
National Forest ◽  
Santa Fe ◽  
First Order ◽  
Southern Rocky Mountains

The phylum Nematomorpha contains approximately 350 species in 19 extant genera. The genus Gordionus contains 56species, four of which occur in the contiguous United States of America. Here we describe two new Gordionus speciesfrom the southern Rocky Mountains. Worms were collected at three sites in the Santa Fe National Forest in northern NewMexico in the southernmost tip of the Rocky Mountains. Sites consisted of first order streams above 3120m in aspen/pinewoodland. Gordionus lokaaus n. sp. has flat, polygonal or roundish, areoles covering all parts of the body. The male cloa-cal opening is surrounded by broad bristles with stout apexes forming a unique tube-like opening. Adhesive warts aresmall and postcloacal spines are thin and triangular-shaped. Gordionus bilaus n. sp. also has flat polygonal or roundshaped areoles, but has indistinct interareolar furrows making neighboring areoles appear fused. The male cloacal openingis surrounded by stout, finger-like bristles in 2‒3 rows. Adhesive warts are larger and postcloacal spines are broad andmound-shaped. These species double the number known from the state of New Mexico and are the first gordiids described from the southern part of the Rocky Mountains.

Distribution, Abundance, And Nest-Site Characteristics Of Black Swifts In The Southern Rocky Mountains Of Colorado And New Mexico

2008 ◽  
Vol 120 (2) ◽  
pp. 331-338 ◽  
Author(s):  
Richard G. Levad ◽  
Kim M. Potter ◽  
Christopher W. Shultz ◽  
Carolyn Gunn ◽  
Joseph G. Doerr
Keyword(s):  
New Mexico ◽  
Rocky Mountains ◽  
Nest Site ◽  
Southern Rocky Mountains ◽  
Site Characteristics

scholarly journals Tree Shelters Improve the Survival and Growth of Planted Engelmann Spruce Seedlings in Southwestern Colorado

2001 ◽  
Vol 16 (3) ◽  
pp. 114-120 ◽  
Author(s):  
Douglass F. Jacobs ◽  
Klaus Steinbeck
Keyword(s):  
Rocky Mountains ◽  
Growing Season ◽  
High Elevation ◽  
Picea Engelmannii ◽  
Control Treatment ◽  
Growth And Survival ◽  
Tree Shelters ◽  
Engelmann Spruce ◽  
Growing Seasons ◽  
Survival And Growth

Abstract Shade-tolerant Engelmann spruce (Picea engelmannii) is a difficult species to reforest successfully in the high-elevation spruce-fir forests of the Rocky Mountains. This study investigated the use of plastic tree shelters as a form of shade protection and a means to improve the growth and survival of planted Engelmann spruce seedlings in southwest Colorado. A total of 1500 seedlings were planted into a 48 ha clearcut site at an average elevation of 3273 m. Treatments included four different colors of tree shelters and a control where seedlings were planted using the traditional shading method. This consisted of shading the seedlings using logging slash, stumps, and vegetation within the site. After two growing seasons, survival was 58% for the control treatment and ranged from 95 to 99% in the lighter three shelter color treatments. The darkest shelter color resulted in 95% mortality after the first growing season. Both height and diameter growth of surviving seedlings were significantly greater in the lightest two shelter color treatments as compared to the control treatment. These results indicate that tree shelters may provide an effective method of improving high-elevation Engelmann spruce reforestation programs. West. J. Appl. For. 16(3):114–120.

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