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  • The possible mechanism of cotton premature senescence under drip irrigation below mulch film-From the perspective of growth and nutrients.

    Author(s) : Mai WenXuanTian ChangYan

    Author Affiliation : Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, Xinjiang, China.

    Journal article : Plant Nutrition and Fertilizer Science 2012 Vol.18 No.1 pp.132-138 ref.20

    Abstract : Premature senescencesenescenceSubject Category: Natural Processes
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    of cottoncottonSubject Category: Commodities and Products
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    under drip irrigation below mulch film (DI) is much more widespread than under floodingfloodingSubject Category: Miscellaneous
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    irrigation (FI), and the change of plant nutrientsnutrientsSubject Category: Miscellaneous
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    under DI has been regarded as a possible influencing factor. In this study, a field experiment was conducted to investigate the cotton growth and nutrient status under DI in comparison to FI. Severe symptomssymptomsSubject Category: Diseases, Disorders, and Symptoms
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    of premature senescence occurred at the later growth stagesgrowth stagesSubject Category: Miscellaneous
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    of cotton under DI, while no such symptoms were observed under FI. At 125 DAS (late bolling stage), shoot biomassbiomassSubject Category: Miscellaneous
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    under DI was significantly higher than that under FI, while root biomasses showed an opposite trend, and the shoot/root ratio under DI was significantly higher than that under FI. The shoot dry weight of plantsplantsSubject Category: Organism Names
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    grown under DI dropped abruptly from 125 DAS (late bolling stage) to 160 DAS (boll opening stage). Field observations indicated that the main reason for the decrease was the shedding of a large number of leaves, squares and bollsbollsSubject Category: Anatomical and Morphological Structures
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    . The shoot to root ratio under DI also decreased to the same level as that of the FI treatment. An analysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    of leaf nutritionnutritionSubject Category: Miscellaneous
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    revealed that the nitrogennitrogenSubject Category: Chemicals and Chemical Groups
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    and phosphorusphosphorusSubject Category: Chemicals and Chemical Groups
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    concentrations of old leaves were lower than those of young leaves under both of DI and FI at the later growth stages, whereas the potassiumpotassiumSubject Category: Chemicals and Chemical Groups
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    concentration presented an opposite picture. The K concentration of young leaves under DI was lower than that under FI, and the K concentration of cotton shootsshootsSubject Category: Anatomical and Morphological Structures
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    showed a similar trend. The above results suggested that premature senescence of cotton under DI may result from the fact that the requirement of the vigorously growing shoots for K exceeds the K amount that the poorly developed rootsrootsSubject Category: Anatomical and Morphological Structures
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    are able to supply.

    ISSN : 1008-505X

    Record Number : 20123199941

    Publisher : Editorial Department of Plant Nutrition and Fertilizer Science

    Location of publication : Beijing

    Country of publication : China

    Language of text : Chinese

    Language of summary : English

    Indexing terms for this abstract:

    Organism descriptor(s) : GossypiumgossypiumSubject Category: Organism Names
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    Descriptor(s) : analysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    , biomassbiomassSubject Category: Miscellaneous
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    , bollsbollsSubject Category: Anatomical and Morphological Structures
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    , cottoncottonSubject Category: Commodities and Products
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    , floodingfloodingSubject Category: Miscellaneous
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    , growth stagesgrowth stagesSubject Category: Miscellaneous
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    , irrigationirrigationSubject Category: Miscellaneous
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    , mulchesmulchesSubject Category: Miscellaneous
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    , nitrogennitrogenSubject Category: Chemicals and Chemical Groups
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    , nutrientsnutrientsSubject Category: Miscellaneous
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    , nutritionnutritionSubject Category: Miscellaneous
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    , phosphorusphosphorusSubject Category: Chemicals and Chemical Groups
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    , potassiumpotassiumSubject Category: Chemicals and Chemical Groups
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    , rootsrootsSubject Category: Anatomical and Morphological Structures
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    , senescencesenescenceSubject Category: Natural Processes
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    , shootsshootsSubject Category: Anatomical and Morphological Structures
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    , symptomssymptomsSubject Category: Diseases, Disorders, and Symptoms
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    , trickle irrigationtrickle irrigationSubject Category: Techniques, Methodologies and Equipment
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    Identifier(s) : flooded conditions, mulching materials, watering

    Broader term(s) : MalvaceaemalvaceaeSubject Category: Organism Names
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    , MalvalesmalvalesSubject Category: Organism Names
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    , eudicotseudicotsSubject Category: Organism Names
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    , angiospermsangiospermsSubject Category: Organism Names
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    , SpermatophytaspermatophytaSubject Category: Organism Names
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    , plantsplantsSubject Category: Organism Names
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    , eukaryoteseukaryotesSubject Category: Organism Names
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