Wheat residue incorporation modulate emergence and seedling growth of canary grass by affecting biochemical attributes and soil properties. | [International Journal of Agriculture and Biology • 2016]

Author(s):

1. Farhena Aslam: Department of Agronomy, University of Agriculture, Faisalabad, Pakistan;Ayub Agriculture Research Institute, Faisalabad, Pakistan

2. Abdul-Khaliq : Department of Agronomy, University of Agriculture, Faisalabad, Pakistan

3. Asif Tanveer: Department of Agronomy, University of Agriculture, Faisalabad, Pakistan

4. Zahir Ahmad Zahir: Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, Pakistan

5. Amar Matloob: Department of Agronomy, Muhammad Nawaz Shreef University of Agriculture, Multan, Pakistan

Abstract:

Residue incorporation greatly modifies the soil chemical properties, and regulates seed germination and subsequent growth of neighboring species by inducing metabolic changes. Such growth regulatory effects often vary among cultivars and the stage of growth of donor plants. Little information is available on the induced biochemical changes in receiver plants and the soil chemical properties when wheat residue collected at different growth stages is incorporated into the soil. Bioassays were conducted to appraise the allelopathic potential of residue (8 G kg-1 soil) of hexaploid wheat (Triticum aestivum L.) cultivars (Millat-2011, AARI-2011, Lasani-2008 and Faisalabad-2008) collected at tillering (Z-30), anthesis (Z-60) and maturity (Z- 90)] against canary grass (Phalaris minor Retz.). Mean emergence time of canary grass was prolonged over control by soil incorporation of residue at anthesis and maturity stages of cultivars AARI-2011 and Lasani-2008. Final emergence percentage declined by 13?31% for residue collected at different growth stages. Maximum suppression in shoot (33?51% and 28?53%) and root (34?52% and 28?54%) length and seedling dry biomass (66?88% and 58?86%) of canary grass over control was also recorded under aforementioned treatment combinations. Total chlorophyll contents in canary grass declined in response to soil incorporation of residue at anthesis and maturity stages of all wheat cultivars but an increase was recorded for residue incorporated at tillering stage. Phenolic contents in residue and residue-amended soil increased with advancement in stage of wheat growth. Biochemical bases of phytotoxicity and changes in activities of enzymatic antioxidants in canary grass seedling are discussed. Such information suggests the growth regulatory potential of residue of specific wheat cultivars against weeds of economic significance in wheat based cropping systems and scope for increasing nutrient status of soils.

Page(s): 1033-1042

DOI: DOI not available

Published: Journal: International Journal of Agriculture and Biology, Volume: 18, Issue: 5, Year: 2016

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