Author: Athumani Kassim KissiwaPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 136
Book Description
One-year Clear Seeded Alfalfa (Medicago Sativa L.) as a Nitrogen Source for Corn (Zea Mays Indentata L.)
Author: Athumani Kassim KissiwaPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 136
Book Description
Nitrogen Nutrition of Seedling Alfalfa (Medicago Sativa L.)
Author: Bertrand D. EardlyPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 220
Book Description
Nitrogen fertilization of seedling legumes is a controversial practice intended to provide N to the plant during periods when seed N, soil N, and N2 fixation may not meet plant requirements; eg. prenodulation, postharvest, or in the event of an inoculation failure. Field experiments were conducted in 3 consecutive years (1980, 1981, and 1982) on a Woodburn silt loam soil (Aquultic Argixeroll) containing low soil N to evaluate the effect of 9 rates of NH4 NO3 -N (0-224 kg N ha−1) on nodulation, acetylene reduction (AR), percentage herbage N, percentage nitrate N, and dry matter yield of seedling alfalfa (Medicago sativa L. cv. 'Apollo'). The R. meliloti at the field site were found to be ineffective at N2 fixation, thus an inoculation treatment was added in 1982 by the use of a split-block design. The response of the variables to applied N was evaluated at 10 weeks, and over a postharvest time course. At ten weeks after planting, only the uninoculated, ineffectively nodulated plants exhibited increased herbage yield and %N in response to the applied N. All rates of N fertilization decreased nodulation and AR in a curvilinear response, regardless of rhizobial effectiveness. The applied NH4NO3 continued to decrease AR and nodulation of seedlings through the third week after the initial harvest. Acetylene reduction activity of control plants dropped to 68% of preharvest levels at 2 to 4 days postharvest, then recovered during the next 4 weeks. Herbage nitrate N was increased in one year out of three. Dry matter yield and total herbage N of uninoculated plants were increased during the initial growing season, and unaffected the following spring. Since the inoculated plants showed little response to the N rates, except for decreased N2 fixation, it was concluded that during establishment, managerial emphasis should be placed on inoculation rather than N fertilization to obtain a consistent source of N for herbage protein. An ancillary investigation was conducted to characterize native Rhizobium taken from uninoculated, ineffectively nodulated, M. sativa nodules. Results suggested that Phaseolus vulgaris L. may be an alternate host for the native Rhizobium. Agricultural implications of this finding were discussed.
An Evaluation of Alfalfa as a Nitrogen Source
Author: Frederick L. GroyaPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 108
Book Description
Improvement of the Nitrogen Fixation Potential in Alfalfa (Medicago Sativa L.)
Author: David L. HoffmanPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 60
Book Description
Symbiotic Nitrogen Fixation in Alfalfa (Medicago Sativa L.) During Vegetative Regrowth
Author: Kathleen Ann FishbeckPublisher:
ISBN:
Category :
Languages : en
Pages : 162
Book Description
Yields, Root Development, Carbohydrate Reserves and in Vitro Dry Matter Disappearance of Spring-seeded Alfalfa (Medicago Sativa L.) Treated with Herbicides and Harvested in the Year of Seeding
Author: Seppo Kalevi PulliPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 220
Book Description
Development and Application of Transformation Techniques to Alfalfa (Medicago Sativa L.), Sugarbeet (Beta Vulgaris L.) and Maize (Zea Mays L.)
Author: Katelijn D' HalluinInfluence of Climatic and Soil Factors on the Release of Soluble Nitrogen and Protein from Alfalfa (Medicago Sativa L.) Cultivars
Author: Richard Paul WalgenbachPublisher:
ISBN:
Category :
Languages : en
Pages : 188
Book Description
Host Plant Metabolism of Symbiotically Fixed Nitrogen in Alfalfa (Medicago Sativa L.) Root Nodules
Author: Randall Gene GroatYield Response of an Alfalfa (Medicago Sativa L.) and Timothy (Phleum Pratense) Mixture to P and K, Mg, B, and N on a Typic Haplorthod, Adams Loamy Fine Sand
Author: Norman William PaulingPublisher:
ISBN:
Category :
Languages : en
Pages : 306
Book Description