Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Jochen Kummerow"'
Publikováno v:
Plant and Soil. 131:225-228
The deciduous tropical dry forest at Chamela (Jalisco, Mexico) occurs in a seasonal climate with eight rainless (November through June) and four wet months (700 mm annual precipitation). The forest reaches a mean height of 10 m. Tree density in the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00773e0cb29d6f58cd165525fd3b29c7
https://doi.org/10.1007/bf00009452
https://doi.org/10.1007/bf00009452
Publikováno v:
Annals of Botany. 67:97-101
The effect of varying independently nutrient solution temperature (5, 15, 25°C) and air temperature (10, 20, 30°C) on hydroponically grown Ceanothus greggii (Rhamnaceae) seedlings was studied. Increasing both air and solution temperatures caused hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef0ed30004831cf33d6da48de111e1f6
https://doi.org/10.1093/oxfordjournals.aob.a088121
https://doi.org/10.1093/oxfordjournals.aob.a088121
Autor:
Jochen Kummerow, Anne Larigauderie
Publikováno v:
Ecography. 14:38-44
The purpose of the experiment was to see whether a change in nutrient availability resulting from perturbations might alter rates of development of the major plant growth forms of an arctic tussock tundra slope. Slow release fertilizer pellets (NPK)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0126016aabb008f9faef2472a6476160
https://doi.org/10.1111/j.1600-0587.1991.tb00631.x
https://doi.org/10.1111/j.1600-0587.1991.tb00631.x
Publikováno v:
Vegetatio. 90:73-80
Very limited information regarding fine-root growth and production of tropical dry forests is available. Fine roots and small roots are defined as rootlets with diameters < 1 mm and 1.1 to 5 mm, respectively. Live and dead fine-and small-root mass fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a42de0649da6090e11f65be24ac0923f
https://doi.org/10.1007/bf00045590
https://doi.org/10.1007/bf00045590
Publikováno v:
Vegetatio. 87:37-44
Quercus coccifera L., the characteristic scrub oak of the garrigue, covers more than 100,000 ha in southern France alone. Precipitation in this area averages 900 mm/year and summer rains are not rare. A total belowground biomass of 7.2 kg/m2, includi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5311866aa016f5a75107c84ff2dc26ac
https://doi.org/10.1007/bf00045653
https://doi.org/10.1007/bf00045653
Autor:
G. M. Marion, Jochen Kummerow
Publikováno v:
Ecography. 13:50-55
Nitrogen (N) deficiencies in tundra ecosystems could be caused, in part, by the kinetics of root N uptake. The objectives of this study were to quantify NH4 uptake by field-grown excised roots of Eriophorum vaginatum I. under controlled NH4 concentra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71e416949a57e4c44357ffdffc489f19
https://doi.org/10.1111/j.1600-0587.1990.tb00588.x
https://doi.org/10.1111/j.1600-0587.1990.tb00588.x
Publikováno v:
American Journal of Botany. 62:473-478
A B S T R A C T The sclerophyllous evergreen shrub vegetation of southern California and central Chile is characterized by several examples of morphologically similar species. For each one out of a group of four Californian shrub species, four morpho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8efb7c570b36b97c3be21577aae387fb
https://doi.org/10.1002/j.1537-2197.1975.tb14072.x
https://doi.org/10.1002/j.1537-2197.1975.tb14072.x
Autor:
B. A. Ellis, Jochen Kummerow
Publikováno v:
Plant and Soil. 109:207-213
Nitrogen fixation in excised root nodules of 2-year-old, postfireCeanothus tomentosus andC. leucodermis seedlings was measured over an 8-month period using the acetylene reduction method. High levels of NO3−N and NH4−N present in postfire soils w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e989d42a47596ade65a31ed4bd325a4
https://doi.org/10.1007/bf02202086
https://doi.org/10.1007/bf02202086
Publikováno v:
Canadian Journal of Botany. 66:253-256
Root and leaf growth of the arctic sedge Eriophorum vaginatum L. were studied from early spring (June 7) to early fall (August 7) in the foothills of the Brooks Range in northern Alaska. The observations were designed to test the hypothesis that root
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40c1f3b7ee259221caf80a7d737468ef
https://doi.org/10.1139/b88-043
https://doi.org/10.1139/b88-043