The effects of soil physical conditions on the anchorage of wheat (Triticum aretivum L.)

Sulaiman, N.F. (2015) The effects of soil physical conditions on the anchorage of wheat (Triticum aretivum L.). Doctoral thesis, Harper Adams University.

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Abstract

The anchorage provided by the adventitious roots of cereal crops is essential to keep the plant upright and prevent toppling over, known as lodging. Plant anchorage depends on adventitious root development and the physical conditions of the surrounding soil. The research aims to determine the effect of soil conditions on anchorage and yield of wheat. This entailed inves tigating the effect of soil physical conditions, namely, bulk density, moisture content and cultivation systems on the plant properties associated with lodging incidence, focusing primarily on adventitious root development, anchorage moment and the grain y ield of winter wheat. The effect of bulk density (treatments 1.1, 1.3 and 1.5 Mg m - 3 ) in sandy loam and clay loam soil on the anchorage moment of wheat plants grown in pots was significant in both soil types: the plant anchorage moment increased by 40% and 3% with increasing soil bulk density from 1.1 to 1.3 and 1.5 Mg m - 3 , respectively. The adventitious root development and plant anchorage moment was significantly influenced by cultivation systems: under control traffic condition, zero tillage resulted in increased values of the soil physical and adventitious root properties. Consequently, plant anchorage moment increased by 9% and 32% compared to shallow and deep tillage systems, respectively. Nevertheless, the results indicated 35% reduction in the yield due to the tramline effects in zero tillage system compared to shallow and deep tillage systems. Under non - controlled traffic condition, however, the results of determining four tillage treatments showed no effect on the soil physical conditions, adventiti ous root development and plant anchorage moment Furthermore, wheat plants subjected to the reduced moisture content of 50% - 65% of field capacity before flag leaf emergence were estimated to be 25% more likely to root lodge compared to plants grown at 85 % - 100% moisture content of field capacity.

Item Type: Thesis (Doctoral)
Divisions: Crop and Environment Sciences
Depositing User: Ms Kath Osborn
Date Deposited: 22 Aug 2018 15:23
Last Modified: 22 Aug 2018 15:23
URI: http://hau.repository.guildhe.ac.uk/id/eprint/17323

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