Differential tolerance to manganese in introduced and bred lines of Macroptilium atropurpureum

1978 ◽  
Vol 29 (1) ◽  
pp. 67 ◽  
Author(s):  
EM Hutton ◽  
WT Williams ◽  
CS Andrew
Keyword(s):  
Dry Matter ◽  
Inorganic Nitrogen ◽  
Evaluation Studies ◽  
Nitrogen Sources ◽  
Manganese Concentration ◽  
Sand Culture ◽  
Manganese Tolerance ◽  
Growth Evaluation ◽  
Macroptilium Atropurpureum ◽  
Nitrogen Phosphorus

A number of lines of Macroptilium atropurpureum, including cv. Siratro, were grown in two experiments at different manganese levels in sand culture. In one experiment 40 ppm manganese was used in conjunction with nitrogen either in inorganic form or as Rhizobium; in the other, two levels of excess manganese (30 and 45 ppm) were used with rhizobial nitrogen at a lower pH. Dry matter yields for tops, roots and nodules were recorded, and the plant material analysed for nitrogen, phosphorus, calcium and manganese. Dry matter yields of tops were reduced, and the ratio of root to total dry matter yield increased, by both Rhizobium and excess manganese. Tops, but not roots or nodules, showed considerable differences in manganese tolerance between lines. Excess manganese caused small but significant changes in concentrations of other minerals. Regressions of rhizobial on inorganic nitrogen showed that at the levels used excess manganese does not impair rhizobial efficiency. Numerical analyses suggested that manganese tolerance operates at three levels; more vigorous lines usually remain so in the presence of manganese, some lines appear to be able to resist the uptake of excess manganese, and for any given level of manganese concentration within the plant, some lines appear more sensitive than others. The results show that growth evaluation studies can be carried out equally well with rhizobial or inorganic nitrogen sources, and they suggest that it should be possible to improve the tolerance of M. atropurpureum lines by selection and/or breeding.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce III. Nitrogen Content and Response to Nitrogen

1957 ◽  
Vol 10 (3) ◽  
pp. 253 ◽  
Author(s):  
WG Slater ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Nitrate Nitrogen ◽  
Analytical Data ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for total, soluble, and nitrate nitrogen. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of nitrogen was supplied.

EFFECT OF VARIOUS NITROGEN FERTILIZERS ON MANGANESE AND IRON AVAILABILITY AS MEASURED BY INCUBATION AND SAND CULTURE STUDIES

1970 ◽  
Vol 50 (2) ◽  
pp. 163-170 ◽  
Author(s):  
B. T. CHENG ◽  
G. J. OUELLETTE
Keyword(s):  
Inorganic Nitrogen ◽  
Nitrogen Sources ◽  
Nitrogen Fertilizers ◽  
Sand Culture ◽  
Iron Availability ◽  
Culture Studies ◽  
Potato Plants ◽  
Manganese Uptake ◽  
Oxidation Reduction ◽  
Manganese Availability

After two months of incubation, soils treated with inorganic nitrogen fertilizers contained more available manganese than those treated with organic sources, except for thiourea which increased it very considerably. Changes in manganese availability were partly due to pH changes and partly to the oxidation-reduction influence of the nitrogen carriers. Changes in iron availability were very small and this is presumably due to the chelation effect of the humic substances released during incubation of soil at room temperature. Nitrogen sources influenced not only manganese availability, but also manganese uptake by potato plants grown in sand cultures. Manganese uptake was about the same with nitrate and ammonium salts; however, plants supplied with physiologically neutral and basic nitrogen compounds contained appreciably less manganese than those supplied with acid compounds, although the pH of the solution was the same in all treatments.

Nutrient Interactions and Deficiency Diagnosis in the Lettuce V. Potassium Content and Response to Potassium

1958 ◽  
Vol 11 (4) ◽  
pp. 471 ◽  
Author(s):  
AE Grant Lipp ◽  
DW Goodall
Keyword(s):  
Dry Matter ◽  
Analytical Data ◽  
Potassium Content ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Stages Of Growth ◽  
Matter Production ◽  
Subsequent Response ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Lettuce plants grown in sand culture, and receiving nitrogen, phosphorus, and potassium at five levels in all combinations, were analysed at different stages of growth for these elements. An attempt was made to relate these analytical data to the subsequent response (in dry matter production) shown by the plants when a further amount of potassium was supplied.

scholarly journals Nutrient Interactions and Deficiency Diagnosis in the Lettuce II. Effects of Nutrition on Water Content

1957 ◽  
Vol 10 (1) ◽  
pp. 57 ◽  
Author(s):  
DW Goodall ◽  
WG Slater ◽  
AE Grant Lipp
Keyword(s):  
Water Content ◽  
Dry Matter ◽  
Sand Culture ◽  
Nutrient Interactions ◽  
Culture Experiment ◽  
Potassium Supply ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

In a sand� culture experiment with lettuces, the water content (as per cent. of dry matter) of the aerial portions was studied in plants subjected to five levels of nitrogen, phosphorus, and potassium supply in all combinations.

The digestibility and the nitrogen, phosphorus and ash contents of the leaves of some Australian trees and shrubs

1973 ◽  
Vol 13 (62) ◽  
pp. 245 ◽  
Author(s):  
MN McLeod
Keyword(s):  
Significant Variation ◽  
Dry Matter ◽  
Mature Trees ◽  
Lower Range ◽  
Nitrogen Levels ◽  
Dry Matter Digestibility ◽  
Individual Trees ◽  
Trees And Shrubs ◽  
Nitrogen Phosphorus

The dry matter digestibility measured in vitro and the levels of nitrogen, phosphorus and ash were determined on the leaves from mature trees of twenty-one species growing in two arboreta in southeastern Queensland and known to be grazed by animals. Most of the leaf samples had digestibilities in the lower range (68 per cent samples < 50 per cent D.M.D.) and low ash levels (65 per cent samples < 7 per cent ash). Nitrogen levels were satisfactory (86 per cent samples in range 1.5-3.0 per cent N) but the level of phosphorus tended to be low (84 per cent samples < 0.20 per cent P). Statistically significant variation between individual trees and seasons was found with some species.

Distribution of Biomass, Nitrogen, Phosphorus and Other Nutrients in Banksia marginata and B. ornata Shoots of Different Ages After Fire.

1986 ◽  
Vol 34 (6) ◽  
pp. 709 ◽  
Author(s):  
RH Groves ◽  
PJ Hocking ◽  
A Mcmahon
Keyword(s):  
National Park ◽  
Dry Matter ◽  
Lateral Roots ◽  
South Australia ◽  
Distribution Patterns ◽  
Nutrient Accumulation ◽  
Nitrogen And Phosphorus ◽  
Vegetative Organs ◽  
Western Victoria ◽  
Nitrogen Phosphorus

The heathland form of Banksia marginata Cav. regenerates rarely from seed but commonly by resprout- ing from buds on lateral roots, whereas Banksia ornata F. Muell. regenerates only from seed, usually released after fire. The two species co-occur in heath vegetation on nutrient-poor soils in south-eastern South Australia and western Victoria. Shoots were sampled from stands of B. marginata aged from 1 to 25 years and of B. ornata aged from 1 to 50+ years after fire in the Little Desert National Park, western Victoria. B. marginata, the resprouter, distributed a greater proportion of the total shoot dry matter and content of all nutrients to vegetative growth over its shorter life span than B. ornata, the non-sprouter. About 50% of the total phosphorus in B. ornata shoots at 50+ years was present in cones (including seeds) compared with only about 20% in B. marginata shoots at a comparable stage of senescence (25 years). This difference between the species was also true to a lesser degree for nitrogen. There were considerable differences between other nutrients in their distribution patterns in shoots. Nutrients could be grouped together on the basis of distribution in shoots more satisfactorily than on presumed physio- logical roles. Stems were major sites of nutrient accumulation in both species. The content of a particular nutrient in seeds as a proportion of the content in the living parts of the shoot ranged from 0.03% (Na, Mn) to 2.0% (P) in B. marginata, and from 0.3% (Na) to as high as 31% (P) in B. ornata. Concen- trations of all nutrients except sodium were much higher in seeds than in the woody cones or vegetative organs of both species; seeds of B. ornata were particularly rich in calcium and manganese. We conclude that the different patterns of distribution of biomass and nutrients, especially nitrogen and phosphorus, within shoots of the two species reflect their different regenerative modes after fire. Introduction Phosphorus and, to a lesser extent, nitrogen limit the growth of sclerophyllous shrubs on nutrient-poor soils in southern Australia

scholarly journals Symbiotic capability of calopo rhizobia from an agrisoil with different crops in Pernambuco

2013 ◽  
Vol 37 (4) ◽  
pp. 869-876 ◽  
Author(s):  
Altanys Silva Calheiros ◽  
Mario de Andrade Lira Junior ◽  
Débora Magalhães Soares ◽  
Márcia do Vale Barreto Figueiredo
Keyword(s):  
Dry Matter ◽  
Nitrogen Sources ◽  
Dry Weight ◽  
Dry Forest ◽  
Forest Zone ◽  
Symbiotic Efficiency ◽  
Total N ◽  
Calopogonium Mucunoides ◽  
Legume Symbiosis ◽  
Biological Nitrogen

Biological nitrogen fixation by rhizobium-legume symbiosis represents one of the most important nitrogen sources for plants and depends strongly on the symbiotic efficiency of the rhizobium strain. This study evaluated the symbiotic capacity of rhizobial isolates from calopo (CALOPOGONIUM MUCUNOIDES) taken from an agrisoil under BRACHIARIA DECUMBENS pasture, sabiá (MIMOSA CAESALPINIIFOLIA) plantations and Atlantic Forest areas of the Dry Forest Zone of Pernambuco. A total of 1,575 isolates were obtained from 398 groups. A single random isolate of each group was authenticated, in randomized blocks with two replications. Each plant was inoculated with 1 mL of a bacterial broth, containing an estimated population of 10(8) rhizobial cells mL-1. Forty-five days after inoculation, the plants were harvested, separated into shoots, roots and nodules, oven-dried to constant mass, and weighed. Next, the symbiotic capability was tested with 1.5 kg of an autoclaved sand:vermiculite (1:1) mixture in polyethylene bags. The treatments consisted of 122 authenticated isolates, selected based on the shoot dry matter, five uninoculated controls (treated with 0, 50, 100, 150, or 200 kg ha-1 N) and a control inoculated with SEMIA 6152 (=BR1602), a strain of BRADYRHIZOBIUM JAPONICUM The test was performed as described above. The shoot dry matter of the plants inoculated with the most effective isolates did not differ from that of plants treated with 150 kg ha-1 N. Shoot dry matter was positively correlated with all other variables. The proportion of effective isolates was highest among isolates from SABIÁ forests. There was great variation in nodule dry weight, as well as in N contents and total N.

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