The influence of phosphorus and nitrogen on millet and clover growing in soils affected by salinity

Ravikovitch, S.; Yoles, D.

doi:10.1007/bf01372687

Cited by 62 publications

(22 citation statements)

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“…It is likely that other factors may be important in any consideration the differences between species in ability to compete for nitrate. A number of studies suggest salinity levels are of importance in relation to nitrogen assimilation (Lunm and Gallatin, 1965;Ravikovitch and Yoles, 1971). Particularly interesting in relation to the form of nitrogen utilized by salt-marsh plants are the findings of Kayamura and Takada (1971) that the ability of Streptomyces to utilize different nitrogen sources is dependent upon the sodium chloride level in the growth medium.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Metabolism of Halophytes Ii. Nitrate Availability and Utilization

1973

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SUMMARYThe availability and utilization of nitrate by salt-marsh plants has been studied. All the species examined are able to assimilate nitrate, which appears to be the most important form of nitrogen available on the marsh. Speeies, from the strand line and lower marsh have higher nitrogen contents and nitrate reductase levels, than those from the upper marsh. Competition between species for nitrate is more important in the upper than lower marsh, because of low nitrate supply. Species such as Armeria maritima, Glaux maritima, Limonium vulgare and Triglochin maritima are able to compete more effectively for nitrate in the upper marsh than Puccinellia maritima, Salicornia europaea, Suaeda tnarititna, Spergularia media and Spartinax anglica. The results indicate there is an increase in nitrogen supply down the marsh, which may be associated with the input of nitrate during tidal innundation.

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Section: Discussionmentioning

confidence: 99%

Nitrogen Metabolism of Halophytes Ii. Nitrate Availability and Utilization

1973

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“…This is also true for greenhouse-grown crops when saline water is used for irrigation or, when grown in soil, where a high water table or the accumulation of fertilizer residues contributes to the development of saline conditions (Sonneveld 1988). Alleviation of salt stress in leaf vegetables is important not only to prevent yield losses but also to avoid quality deterioration due to physiological disorders such as tipburn van den Ende et al 1975).As salt damage to crops involves not only total salt effect (osmotic effect) but also specific ion effects (Lauchli and Epstein 1984) it has been postulated (Adams and Doerge 1987;Kafkafi 1984;Ravikovitch and Yoles 1971) that crop salinity tolerance can be improved by the suitable use of nutrients. For instance, antagonistic phenomena between ions (e.g.…”

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Combined effects of KNO3 and salinity on yield and chemical composition of lettuce and Chinese cabbage

et al. 1991

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The effect of N and K nutrition on the salt tolerance of lettuce (Lactuca sativa L. cv. 'Salinas') and Chinese cabbage (Brassica campestris L., Pekinensis cv. Kazumi) was evaluated in three greenhouse experiments under a controlled aero-hydroponic system of cultivation. Three levels of KNO3 (1, 5 and 10 mM) were tested in all the experiments with rapidly circulated saline and nonsaline nutrient solutions. Two experiments, carried out between January and March 1989, with lettuce (Exp. I) and Chinese cabbage plants (Exp. III), consisted of two salinity levels, EC= 1.75 and 6.0 dS m-l, the former representing a nonsaline nutrient solution. In the third experiment with lettuce (Exp. II., conducted between March and May 1989), three saline nutrient solutions having EC levels of 4.7, 7.75 and 10.75 dS m-1 were compared to the nonsaline solution. The nutrient solutions were salinized with NaC1 and CaC12, in a 4:1 molar ratio. The highest yields of fresh weight of both crops were obtained from the 5 mM KNO 3 under both saline and non-saline conditions. The 10 mM treatment caused yield reduction in Chinese cabbage, probably due to a severe tipburn disorder. The relatively high fresh weight yield obtained at the lowest (1 raM) KNO 3 level can be explained by the positive effect of circulation velocity on nutrient uptake. The threshold salinity damage value for the vegetative yield of lettuce plants fed by 5 or 10 mM KNO 3 was approximately 5 dSm -1 and the yield decreased by 6.5% per unit dS m-1 above the threshold. No yield improvement due to the addition of KNO 3 occurred under highly saline conditions (Exp. II). The fresh weight of Chinese cabbage obtained from the 'saline' 1 and 5 mM KNO 3 treatments was approximately 15% lower than the 'non-saline'-treatment (Exp. III). Salinity increased tipburn and the effect was not altered by the addition of KNO 3 . No significant interaction between nutrition (KNO 3 level) and salinity was found. The application of salts increased the concentration of Na and C1 * Contribution from Institute of Soils and Water, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel. No. 3092-E 1990 series Offprint requests to: A Feigin in plant tissue and reduced the levels of N and K; the opposite occurred in plants fed by the medium and high levels of KNO a .The yield and quality of leaf vegetables, such as lettuce and Chinese cabbage, grown on irrigated land can be considerably influenced by water composition. This is also true for greenhouse-grown crops when saline water is used for irrigation or, when grown in soil, where a high water table or the accumulation of fertilizer residues contributes to the development of saline conditions (Sonneveld 1988). Alleviation of salt stress in leaf vegetables is important not only to prevent yield losses but also to avoid quality deterioration due to physiological disorders such as tipburn van den Ende et al. 1975).As salt damage to crops involves not only total salt effect (osmotic effect) but also specific ion effects (Lauchli and Epstein 1984) it has b...

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“…In both tops and roots, the K:Na ratio decreased signifrcantly with increase in salinity level. Tops from the EC6 treafinent had the highest N:P ratios, which differed significantly from those of the ECl2 (Heikal et al 1980a) and millet (Ravikovitch and Yoles 1971).…”

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confidence: 86%

Growth and chemical composition of flax cultivars on artificially salinized soil

Beke¹,

Graham²

1995

Can. J. Plant Sci.

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J. Plant Sci. 75: [159][160][161][162]. Seven flax cultivars, grown in a greenhouse in nonsaline, moderately saline, and strongly saline-(l , 6, and 12 dS m-t; soils had greater dry weightJ of plant to=ps on moderately saline treatment. Tops had higher K*. and Na* concentrations on the saline treatments, but K:Na ratios decreased with increasing salinity. Tops were less salt tolerant than roots.Cultivars responded differently to the treatments, but appeared, overall, similar in salt tolerance.Key words: Flax cultivars, ion concentrations, ion ratios, soil salinity, semi-arid region

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The influence of phosphorus and nitrogen on millet and clover growing in soils affected by salinity

Cited by 62 publications

References 5 publications

Nitrogen Metabolism of Halophytes Ii. Nitrate Availability and Utilization

Nitrogen Metabolism of Halophytes Ii. Nitrate Availability and Utilization

Combined effects of KNO3 and salinity on yield and chemical composition of lettuce and Chinese cabbage

Growth and chemical composition of flax cultivars on artificially salinized soil

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