Macronutrient use efficiency in rice (Oryza sativa L.) cv. Hiranmayee under short term stagnant water
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Date
2019
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Publisher
Orissa University of Agriculture and Technology, Bhubaneswar
Abstract
A pot experiment was conducted during kharif’ 2018 in the net house of Department
of Plant Physiology, College of Agriculture, OUAT, Bhubaneswar to study
“Macronutrient use efficiency in rice (Oryza sativa L.) cv. Hiranmayee under short
term stagnant water”, statistically fitted in a completely randomised design with seven
treatments as time of water stagnation and was replicated four times in pots. The
plants were put under 15cm of water stagnation in the pots at 30 DAS for a period of
0 days(Control), 5 days, 10 days, 15 days, 20 days, 25 days, and 30 days and
thereafter the stagnant water was removed and watering was done as and when
required. Recommended dose of fertiliser (80:40:40 NPK kg/ha) and no Ca and Mg
fertiliser was applied initially in each pot with nitrogen as three split doses.
Macronutrient use efficiency of rice cv. Hiranmayee was greatly influenced by short
term period of water stagnation that reduced the yield and yield components viz. test
weight, number of panicles per plant, number of fertile grains per plant. In contrast,
there was increase in metabolic activity of plant as the period of waterlogging
continues up to 30 days than control. The plant height, leaf number, leaf area, tiller
number was not significantly affected but accompanied by remarkable changes in
stress molecule accumulation like proline, protein, total antioxidant and their
scavenging enzymes, catalase and peroxidase activity, in water stagnation condition
than control. The translocation and accumulation of N, P, K, Ca, Mg and S to
different plant parts (root, leaf blade, leaf sheath, panicle before flowering and grain,
husk, rachis after flowering) was decreased as the period of water stagnation
continues up to 30 days.
Description
Th-5671
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