Impact of full vs. deficit irrigations on various phenological stages of wheat

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Research Paper 01/07/2018
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Impact of full vs. deficit irrigations on various phenological stages of wheat

Adeel Aman, Muhammad Adnan
Int. J. Agron. Agri. Res.13( 1), 55-62, July 2018.
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In order to find out the most water critical stage of wheat crop, a pot experiment was carried out in a greenhouse at Faculty of Agriculture, Gomal University, Dera Ismail Khan, during 2016-2017. Randomized complete block (RCB) design with three repetitions was used for execution of the experiment. It was comprised of six treatments (irrigation regimes) which were assigned to pots measuring 53cm2. The application of various irrigation frequencies significantly affected leaf area index, crop growth rate, net assimilation rate, chlorophyll contents, days to emergence, days to maturity, height, tillers and grains count, 1000-seed weight, gain and biological yield as well as harvest index. Among various treatments, the highest grain yield (3821kg ha-1) was achieved when irrigation was applied at all phenological stages. It was followed by the treatment received no irrigation at heading stage (3227.7kg ha-1). The lowest yield (993.7kg ha-1) was, however, recorded in treatment where irrigation was applied at three weeks after seedling emergence. Therefore, it can be inferred from this experiment that seedling, tillering and grain formation are the most sensitive and critical moisture stress stages for obtaining higher yield of wheat under Agro-climatic conditions of Dera Ismail Khan.


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