Sodium and Potassium Requirements of Pangola and Other Pasture Grasses

Gammon, Nathan

doi:10.1097/00010694-195307000-00009

Cited by 24 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plants of agricultural importance that respond to Na+, even though K+ is present in high concentrations in nutrient media, include Apium graveolens, Beta vulgaris (mangel), Beta vulgaris (sugar beet), Beta' vulgaris (Swiss chard), Beta vulgaris (table beet), and Brassica rapa. There is ' much evidence (55,81,120,129,151,244,266) that Na+ is beneficial to the growth of many field crop plants but it cannot replace K+, and has not proven to be essential for them.…”

Section: Role Of Minerals Other Than Univalent Cations-a Surveymentioning

confidence: 99%

Role of Mineral Elements with Emphasis on the Univalent Cations

Evans¹,

Sorger²

1966

Annu. Rev. Plant. Physiol.

492

186

View full text Add to dashboard Cite

Section: Role Of Minerals Other Than Univalent Cations-a Surveymentioning

confidence: 99%

Role of Mineral Elements with Emphasis on the Univalent Cations

Evans¹,

Sorger²

1966

Annu. Rev. Plant. Physiol.

492

186

View full text Add to dashboard Cite

“…As an indirect factor of growth the beneficial effects of Na applications to the soil have been explained frequently as a release of K from the soil, or as promoting better root development (5). These phenomena have been considered of special importance in meeting the K requirements of plants on soils low in K. Quite often too the growth of plants has been increased by the addition of Na salts to soils (4,5,8,17,36) or to nutrient solutions low in K (12,24,35). When plants are high in K, Na responses have been observed (12,18,31) but most often these are much reduced or not at all in evidence (4,17,18,22,35).…”

mentioning

confidence: 99%

Chlorine, Bromine and Sodium As Nutrients for Sugar Beet Plants

Ulrich

Ohki

1956

Plant Physiol.

View full text Add to dashboard Cite

Chlorine, sodium and silicon have long been considered as elements that are possibly essential to the growth and development of sugar beets and other plants. Of these elements Cl has been found just recently by Broyer et al (2) to correct a severe nutritional deficiency of the tomato plant when grown in low halide culture solutions. Raleigh (28) Much has been written about Na in terms of direct and indirect effects upon plant growth (5,9,10,19,20,23 In view of these reports, often indefinite in their conclusions, it was thought worthwhile to re-examine Na, Si and Cl in relation to the growth of sugar beet plants by adding these elements to otherwise complete culture solutions prepared from "chemically pure" salts. The initial experiment was of a factorial design using two levels of the elements in question. The first level of Cl, Na or Si was the amount present as an impurity in the salts and distilled water. The other level was an exact quantity added. It was thought that if the requirement for any one or more of these elements was larger than that provided by the impurities present, it would be revealed by the increased growth of the plants at the higher nutrient level. If increased growth was not obtained, the second step to be taken would include a further purification of all salts for each of the elements not found to enhance growth or development of the sugar beet plant. Two other factors were also included in the experiment; K at 2 levels and 2 beet varieties, giving a total of 5 factors each at 2 levels. METHODS AND MATERIALSPLANT CULTURE: The sugar beet (Beta vulgaris) varieties used in the 25 factorial experiment were U.S. 22/3 and GW 304, and for the chloride series experiment, U.S. 75

show abstract

“…From time 0 to 4 h, accumulation of Na in pretreated shoots was slightly less than that found with controls. Thereafter, the ability of pretreated plants to accumulate Na in shoot tissue increased as a sigmoidal function oftime after anoxia from 1.43 to 3.42 gmol g-' DW, reaching a maximum between 12 and 16 h. The time required for enhanced Na transport and the magnitude of the enhancement appeared to be independent of either the light regimes and nutrient status of the plant before or after anoxia (data not shown).…”

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

“…less than 1.8 mg ml-' (22), and has been associated with high K concentrations in the ingested herbage (24, 31). Sodium additions can reduce K accumulation and the critical concentration of K required to achieve maximum yields (12,17,30).Sodium accumulation in shoots of several grass species is determined by the amount exported from the roots to the shoots by xylem loading (18,29). Crafts and Broyer (7) reported that the transport of Na from roots to shoots of barley (Hordeum vulgare L.) seedlings was 2-to 3-fold greater when the roots were exposed to anoxia treatment the previous day.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Changes in K, Rb, and Na Transport to Shoots after Anoxia

Bräuer¹,

Leggett²,

Egli³

1987

Plant Physiol.

View full text Add to dashboard Cite

The effect of anoxia on subsequent uptake and transport of K, Rb, and Na was examined with seedlings of barley (Hordeum vulgare L.), corn (Zea mays L.), and tall fescue (Lolium x Festuca hybrid derivative) to further our understanding of xylem loading. Roots were incubated in solutions depleted of 02 by flushing with N2 gas. After 1 hour exposure, plants were returned to aerated solutions for 16 hours prior to measuring uptake and transport. For each species, anoxia pretreatment significantly enhanced Na transport to the shoot. The rate of Na accumulation into roots, however, was not affected. There was no enhancement of either K or Rb accumulation in shoots, indicating specificity for Na transport. A minimum exposure to anoxia of 30 minutes and a minimum of 12 hours elapsed time was necessary to achieve the maximum rate of Na transport to the shoot in barley seedlings. Accumulation of Na in the shoot of both the control and anoxia pretreated barley plants was inhibited by anoxia and by addition of the proline analog, L-azetidine-2-carboxylic acid, during the uptake period. Enhancement of Na transport was associated with a proportional increase in the rate of synthesis of a membrane bound protein with a molecular weight of 78,000 daltons.There is increasing interest in substituting Na salts for K fertilizers as a means of reducing the hypomagnesemesia potential of some pastures. Hypomagnesemesia or grass tetany is a metabolic disorder of ruminants characterized by low serum Mg, i.e. less than 1.8 mg ml-' (22), and has been associated with high K concentrations in the ingested herbage (24, 31). Sodium additions can reduce K accumulation and the critical concentration of K required to achieve maximum yields (12,17,30).Sodium accumulation in shoots of several grass species is determined by the amount exported from the roots to the shoots by xylem loading (18,29). Crafts and Broyer (7) reported that the transport of Na from roots to shoots of barley (Hordeum vulgare L.) seedlings was 2-to 3-fold greater when the roots were exposed to anoxia treatment the previous day. The purpose of this study was to further characterize the effect of anoxia pretreatment on root uptake of K, Rb, and Na and transport to shoots to gain further understanding of xylem loading that may aid the development of cultural practices substituting Na for K. MATERIALS AND METHODSGrowing Conditions. Barley (Hordeum vulgare L. cv 'Barsoy') seeds were allowed to imbibe water overnight in 0.2 mm CaSO4 and were incubated for 2 d between moistened layers of germination paper. After radicle and coleoptile emergence, 5 seedlings were placed on a stainless steel grid (3.0 cm diameter) inserted into a plastic retention ring and covered with moistened perlite. Twenty-four retention rings were suspended over 10 L ofaerated 0.2 mm CaSO4, and held in the dark at 22C for 2 d. On d 5, the CaSO4 solution was replaced with 0.1 strength Hoagland solution (16) and a 12 h day/night regime was imposed.On d 8, after 6 to 8 h illumination, roots of half of the ...

show abstract

Sodium and Potassium Requirements of Pangola and Other Pasture Grasses

Cited by 24 publications

References 0 publications

Role of Mineral Elements with Emphasis on the Univalent Cations

Role of Mineral Elements with Emphasis on the Univalent Cations

Chlorine, Bromine and Sodium As Nutrients for Sugar Beet Plants

Changes in K, Rb, and Na Transport to Shoots after Anoxia

Contact Info

Product

Resources

About