Date Received: 14-10-2014
Date Accepted: 17-11-2014
Date Published: 06-08-2025
##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2014.12.8.
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How to Cite:
Non-Structural Carbohydrates Accumulation in Stems of Early Maturing Rice Lineunder DifferentNitrogen Rates
,
Tang Thi Hanh
,
Nguyen Van Hoan
,
Pham Van Cuong
Keywords
Dry weight, early maturing rice, nitrogen rates, non - structural carbohydrates
Abstract
Pot experiments were carried out in the green house at Faculty of Agronomy in 2012 autumn and 2013 spring seasons under low nitrogen (N1), intermediate nitrogen (N2) and high nitrogen (N3) ratesto evaluatethe accumulation ofnon-strutural carbohydrates(NSCs)in stems of a newly developed line with early maturityand the check cultivar IR 24. The experiments were laid out in randomized complete block (RCB) with 4 replications. At the heading stage, 7, 14 and 21 days after heading (DAH) one plant of each treatment were randomly selected to measure leaf area, dry weight of stems and total mass of non-structural carbohydrates (TNSCs) translocated from stems to panicles. Grain yield was determined at harvest. The results showed thatnitrogen levels affected NSCs accumulation in stems at heading stage and TNSCstranslocation. The contribution of NCSsin stems at heading stage to grain yield was higher in IL19-4-3-8 than in IR 24. The amount (mg/g) of NSC residues in stem at after heading stage of IL19-4-3-8 was lower than IR 24. Sinigficant and positive correlation was found betweenTNSCs from heading stage to 7 day after heading (DAH) and individual grain yield of IL19-4-3-8 in both season, whereas the correlation was positive but insignificant in IR 24.
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