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

Ravikovitch, S.; Yoles, D.

doi:10.1007/bf01372688

Cited by 29 publications

(10 citation statements)

References 8 publications

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“…The depressing effect of salinity on plant growth has been reported by various researchers (17)(18)(19)(20)(21)(22). A number of investigators have also noted a positive effect of N on plants grown in saline conditions (7,8,24,25). Irrespective of salinity levels, plant grew better under urea treatment than composted manure.…”

Section: Plant Growthmentioning

confidence: 70%

Urea and Manure Effect on Growth and Mineral Contents of Maize Under Saline Conditions

Irshad

Yamamoto

Eneji

et al. 2002

Journal of Plant Nutrition

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Salinity and soil nutrient deficiencies are the main factors reducing plant productivity in arid and semiarid areas. Among the essential elements, nitrogen is usually the most growth limiting plant nutrient in saline or non-saline soils. A pot experiment was carried out in the greenhouse to evaluate the influence of composted manure and urea as nitrogen sources on growth and mineral [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na)] content of maize (Zea mays L.) under different levels of salinity. Saline soils were prepared from an infertile loamy-sand soil, namely masatsuchi, by adding a mixture of Ca, Mg, and Na salt solutions with concentrations of 60, 110, and 160 mmol c L À 1 . The final salinity levels (ECe) achieved were 4, 9, and 13 dSm À 1 denoted as S1, S2, S3, respectively; S0 denotes untreated soil. The pH of the saline soils ranged from 7.1 to 7.4. Nitrogen was applied at four levels JOURNAL ORDER REPRINTS as follows: urea, composted manure, 1 2 urea þ 1 2 composted manure, and a control (no N fertilizer). Each of the three levels of applied N was at the rate of 200 kg ha À 1 . A basal dose of P and K was also applied. Treatments were factorially combined using RCB design with 3 replications. Maize was grown as the test crop. Plant growth and shoot and root biomass were monitored for 8 weeks, and shoot samples were also analyzed for N, P, K, Ca, Mg, and Na. Maize height and dry matter production were depressed with increasing salinity levels. The application of composted manure and urea fertilizer enhanced plant growth and nutrient uptake compared with the non-treated control. Maize growth was better under urea fertilizer than under composted manure. The uptake of nutrient was also affected by the salinity and form of fertilizer applied. Calcium, Mg, and Na uptake of shoot increased with increasing level of salinity irrespective of fertilizer level. However, for any level of salinity, the uptake of these elements differed in the following order: urea > urea þ manure > composted manure > control. Nitrogen uptake decreased with increasing salinity up to S2 while P and K decreased up to S3. Irrespective of salinity, N, P, and K uptake were higher in urea and urea þ manure treatments as compared to manure and control. The poor response of composted manure may be due to its short-term application or impeded N mineralization under saline conditions.

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Section: Plant Growthmentioning

confidence: 70%

Urea and Manure Effect on Growth and Mineral Contents of Maize Under Saline Conditions

Irshad

Yamamoto

Eneji

et al. 2002

Journal of Plant Nutrition

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“…Salinity could induce P deficiency in young leaf tissues at low [Pi] in the root medium. It has been reported that in field studies P fertilization enhanced salinity tolerance of barley and wheat (Manchanda et al 1982) and of clover and millet (Ravikovitch and Yoles 1971). In addition, in tomato plants grown in nutrient solution with low [Pi], salinity tolerance increased as [Pi] in the root medium increased (Award et al 1990).…”

Section: Discussionmentioning

confidence: 98%

Phosphorus translocation in salt-stressed cotton

Martı́nez¹,

Läuchli²

1991

Physiol Plant

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1991. Phosphorus translocation in salt-stressed cotton. -Physiol. Piant. 83: 627-^32.The effect of salinity on plants has usually been studied at high inorganic P concentration ([Pi]) in the nutrient solution, and salinity x Pi interactions have been examined at much higher [Pi] than found in soil solutions. Short-term ^^Fi experiments were carried out to study the effect of salinity (150 mM NaCl) on phosphorus translocation in cotton plants (Gossypium hirsutum L. cv. Acala SJ-2) grown in nutrient solutions containing 10 \iM [Pi]. The effect of additional Ca to a concentration of 10 mM was also tested. Salinity inhibited '^P translocation from root to shoot. This inhibition was more evident at higher [Pi] in the root medium. Increasing [Pi] 33-fold in the solution resulted in a 4.3-fold increase in [^"P| in the root under saline conditions, but only in a 1.8-fold increase in the shoot. In older shoot tissues total [Pj was elevated in the salinized plants. In the young tissues, however, total P concentration was higher in control plants. Inhibition of ^*P translocation by salinity was greater from root to young leaves than to mature shoot tissues. Salinity also decreased '^P recirculation from the cotyledons to the young leaf. Inhibition by salinity of both '-P translocation and recirculation to young leaves was fully reversed by increasing Ca supply from 1 to 10 mM.

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

Cited by 29 publications

References 8 publications

Urea and Manure Effect on Growth and Mineral Contents of Maize Under Saline Conditions

Urea and Manure Effect on Growth and Mineral Contents of Maize Under Saline Conditions

Phosphorus translocation in salt-stressed cotton

Nitrogen Metabolism of Halophytes Ii. Nitrate Availability and Utilization

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