Responses of Alfalfa (Medicago Sativa L.) to Growth Regulators in Combination with Different Systems of Management PDF Download
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Author: Martin Andrew Massengale
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 344
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Author: Martin Andrew Massengale
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 344
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Author: Tafesse Kibatu Shikur
Publisher: LAP Lambert Academic Publishing
ISBN: 9783848423712
Category :
Languages : en
Pages : 100
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Citrus seedlings are generally slower in growth when compared with other major fruits. It is clear that the more the seedlings stay in the nursery the more difficult it would be to fulfill required nursery activities such as protecting the seedlings from environmental hazards and diseases. In addition rapid growth rate will reduce the cost of nursery operations and enable fast virus indexing. Triacontanol, a common constituent of plant waxes, was shown to be an active growth substance, which at nanomolar concentrations increased the growth and yield of crops. However, these synthetic growth regulators are expensive and not available in developing countries. Growth stimulating effect of alfalfa has been documented by mulching or watering plant with an extract prepared by socking in water. Two experiments were conducted in two sites. The result of the study have revealed that seedling length, number of leaves, seedling diameter, dry weight and leaf area of Troyer Citrange can be increased by manipulating socking time and application intervals of alfalfa water extract and amount of alfalfa mulch.
Author: Kuen-Jann Yeh
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 90
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Author: John Charles Phillips
Publisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 242
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Experiments were conducted to determine the effects of certain plant regulatory chemicals on seed production of alfalfa (Medicago sativa L.). Two plant regulators, SADH (succinic acid 2,2-dimethylhydrazide) and TIBA (2,3,5- triiodobenzoic acid), received particular attention. Replicated field tests of the plant regulators were carried out on the cultivar 'Talent' in southern Oregon and on 'DuPuits' in the Willamette Valley. Other experiments were conducted in the greenhouse, laboratory, and in controlled environment chambers to explore possible modes of action. In 1972 foliar sprays of SADH and an experimental formulation of succinic acid derivatives, TD-6266-R, resulted in seed yields of 'Talent' of approximately 400 kg ha−1 compared to 168 kg ha−1 in untreated plots. These responses were statistically significant, while lesser seed yield increases due to 2,4-DB [4-(2,4-dichlorophenoxY) butyric acid] and chlormequat [(2-chloroethyl)trimethylammonium chloride] were not significant. Similar field testing in 1973 resulted in no seed yield enhancement by any plant regulator. However, precipitation at the experimental site during the 1973 growing season was only 0.4 cm in contrast to the 30-year average of 4.3 cm. A plant regulator-environment interaction is suggested. Yield component analysis showed that the number of seeds per pod was increased significantly by the same treatments which promoted yield. Number of pods per raceme was also a strong determinant of seed yield. The relative importance of one component of yield, the number of seedbearing racemes per unit land area, is yet to be established. After treatment with SADH and TIBA in 1973, fieldgrown 'DuPuits' alfalfa accumulated more total dry matter and up to twice as much dry matter in pods as did untreated plots. Shoots treated with TIBA exhibited a mean net carbon dioxide exchange (NCE) rate of 21 mg CO2 dm−2 leaf area hr−1 compared to 16 mg CO2 dm−2 hr −1 for SADH-treated and control shoots. However, dry matter accumulation and NCE responses were statistically nonsignificant at the .05 probability level. Specific leaf weight exhibited an increased diurnal maximum when treated with SADH and TIBA, while the diurnal minimum remained equal to that of control plants. The principal effect of TIBA on reproductive development was via its promotion of the growth and raceme initiation of axillary branches. In a dosage response study, 10 ppm TIBA was most effective, resulting in a fourfold increase in total branch length per primary stem and a highly significant increase in total raceme production. The finding that two axillary structures generally arise from an alfalfa leaf axil may be useful in understanding the phenomena of branching and floral initiation in this crop. Alfalfa genotypes differed in their growth response to environmental conditions. It appeared possible that genotypes also differed in response to applied plant regulators. This research has shown that applied plant regulators can promote flowering in alfalfa and has suggested that the carbon budget of alfalfa may also be affected. These changes may or may not be translated into increased seed production. The net effects are a result of plant regulator interaction with environmental conditions and plant genotype. Thus, variability in the response to plant regulators can be expected.
Author: Norman William Pauling
Publisher:
ISBN:
Category :
Languages : en
Pages : 306
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Author: L. Neville Wilson
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 776
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Author:
Publisher:
ISBN:
Category : Weeds
Languages : en
Pages : 720
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Author: Fareed Kow Nanse Arthur
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1732
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