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Comparison of Antioxidant Activity and Antioxidant Components in Lettuce, Onion and Tomato Obtained with Different Levels and Forms of Nitrogen Fertilization

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Journal of Agricultural Science and Technology(A) 2014年第7期4卷 597-604页

作者： Ragab Abdelmohsen E1-Mergawi Khalid Naser Al-Redhaiman Hussein F. Abouziena Department of Plant Production and Protection College of Agriculture and Veterinary Medicine Qassim University Buraidah51452 Al-Qassim Saudi Arabia Department of Botany Agricultural & Biological Research Division National Research Center Cairo 12622 Egypt

The effect of N levels and sources on the antioxidant components in vegetable is not completely understood. Therefore, greenhouse experiments were conducted to determine the changes in antioxidant capacity diphenyl-2-picrylhydrazyl （DPPH） and ferric reducing antioxidant power （FRAP）, total phenolics, ascorbic acid, total carotene and lycopene contents in edible portions of lettuce, onion and tomato due to different nitrogen levels and sources. The experiment included three N levels （20, 40 and 60 kg/ha for lettuce trial and 60, 120 and 180 kg/ha for either onion or tomato） and four nitrogen sources （calcium nitrate, ammonium sulphate, ammonium nitrate and urea.. The antioxidant capacity and phenolic contents in lettuce was enhanced under low nitrogen level, while the antioxidant capacities, phenolics, carotenoids and lycopene in tomato fruits were not significantly affected by the nitrogen dose applied. Application of calcium nitrate caused 50% increase in DPPH and 20% in FRAP of lettuce compared to other nitrogen forms. Tomato treated with calcium nitrate or ammonium sulphate had higher phenolic and ascorbic acid contents than treated plants with ammonium nitrate or urea. Antioxidant tested parameters of onion were not significantly affected by the nitrogen treatments. Nitrogen concentration in tomato fruits significantly correlated with FRAP antioxidant capacity, phenolics, ascorbic acid, carotene and lycopene contents.

关键词： Ammonium nitrate ammonium sulphate ascorbic acid calcium nitrate carotene phenolics urea.

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Effect of Foliar Copper Fertilizer on Pineapple cv. N36 Planted on BRIS Soil at East Coast of Peninsular Malaysia

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Journal of Environmental Science and Engineering 2011年第12期5卷 1678-1682页

作者： A.M. Arshad A.A. Marzuki A. Aziz Department of Agro-technology Faculty of Agro-technology and Food Sciences Universiti Malaysia Terengganu Kuala Terengganu Terengganu 21030 Malaysia Department of Biological Sciences Faculty of Science and Technology Universiti Malaysia Terengganu Kuala Terengganu Terengganu 21030 Malaysia

The physical and chemical properties of BRIS soil are unsuitable for agricultural purposes. A proper fertilizer and crop management practices are required. An attempt was made to convert this land into a sustainable production land for pineapple. Therefore, the objective of the study was to determine the effect of foliar copper fertilizer on the growth and fruit quality of pineapple cv. N36, for fresh consumption planted in Entisol type BRIS soil at the east coast of Peninsular Malaysia. The complete randomized design （CRD） method with three replications was used at 0 to 6.6 ***^-1 of copper sulfate. Results demonstrated that the unpleasant effect of BRIS soil on brix value was restored with copper fertilizer. The most suitable quantity of foliar copper fertilizer for pineapple cv. N36 planted in Entisol type BRIS are between 1.6 to 3.3 ***^-1 of copper sulfate.

关键词： Brix-value copper sulfate entisol ethephon muriate of potash urea.

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THE EFFECTS OF THREE KINDS OF FERTILIZER ON DEGRADATION OF CHLORSULFURON

THE EFFECTS OF THREE KINDS OF FERTILIZER ON DEGRADATION OF C...

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40th IUPAC Congress

作者： Fa-bing YE Yuan-yan DONG a Xian-wen HU a Tianzhi OUYANG b Department of Chemistry Huanggang Normal University Hubei Huanggang 438000 a Department of Chemistry Huazhong Agricultural University Wuhan 430070 b Department of Bioengineering Hubei Polytechnic University Wuhan 430068

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