| Titles |
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English :
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Impact of mineral and bio-nitrogen fertilization on nitrate accumulation of cucumber
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Arabic :
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تأثير التسميد النيتروجينى المعدنى والحيوى على تراكم النترات فى الخيار
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| Abstract |
The objective of the present study is to asses the effect of mineral and bio-nitrogen fertilizers on the nitrate content of cucumber fruits. Two field experiments were carried out at Sakha Agricultural Research Station Farm, Kafr El-Sheikh Governorate, Egypt during the two successive summer seasons of 2004 and 2005 using the recommended cucumber hybrid seeds. Split split plot design was used with four replicates. The plot area was 20 squire meter. The main plots were assigned to two inoculation methods of 1- the inoculum was added as liquid and, 2- the inoculum was added as tablets. The sub plots were assigned to three mineral nitrogen levels of 1- zero nitrogen (check treatment), 2- 30 kg N fed-1 (fed = 4200 m2), and 3- 60 kg N fed-1. The mineral nitrogen was added as ammonium nitrate 33%. The sub sub plots were assigned to two inoculation treatments of 1- without inoculation and 2- Inoculation with effective strains of non symbiotic N2-fixing bacteria. Nitrate content of the cucumber fruits was measured during the early, middle and late cuttings.
The most important results can be summarized as follows:
* Increasing mineral nitrogen levels led to dramatic increase of nitrate content in cucumber fruits and petioles in both seasons.
* Clear increases in nitrate content of cucumber fruits and petioles were detected due to inoculation with non symbiotic N2-fixing bacteria in both seasons.
* No clear differences in nitrate content of cucumber fruits and petioles were observed due to inoculation methods in both seasons.
* The highest nitrate content was observed in the samples from the early cut and the lowest with the samples of late cut in both seasons.
* Increasing the mineral nitrogen levels led to clear increases of nitrate and nitrite in the soil in both seasons.
* Nitrate and nitrite in the soils were increased by the inoculation with non symbiotic N2-fixing bacteria
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| Publication year |
2006
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| Pages |
1175-1184
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| Availability location |
Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt
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| Availability number |
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| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
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| Country |
Egypt
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| City |
Mansoura
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| Publisher |
Name:
Faculty of Agriculture, Mansoura University
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| serial title |
Mansoura University Journal of Agricultural Sciences
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| ISSN |
1110-0346
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| Volume |
31
. 2
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| Department |
Soil Fertility and Plant Nutrition Research
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| Author(s) from ARC |
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| Agris Categories |
Soil fertility
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AGROVOC
TERMS |
Cucumbers.
Inoculation.
Nitrogen.
Nitrogen fertilizers.
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| Publication Type |
Journal
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