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Research Detail

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F. Ahmed
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.R. Uddin
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.D. Hossain
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

U.K. Sarker
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

D. Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

D.N. Chadny
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

An experiment was conducted at the  Agronomy  Field  Laboratory,  Bangladesh Agricultural University, Mymensingh to evaluate the effect of aqueous extract of  sorghum  crop  residues  on  weed  management  and  crop performance  of  wheat.  The  experiment  consisted  of  three  varieties  of wheat viz., BARI Gom-19, BARI  Gom-21,  BARI  Gom-24  and  five  different levels of treatments such as no use of aqueous extract, aqueous extract  of  sorghum  crop  residues:  1:20  ratio   (w/v),   1:30   ratio   (w/v), 1:40 ratio (w/v) and hand weeding. The experiment was laid out in a randomized complete block design with three replications. Seven weed  species belonging to five families infested the experimental plots. Weed population, weed dry weight and  percent  inhibition  of  weed  were significantly influenced by aqueous extract of sorghum crop residues and varieties. The maximum weed growth was noticed with the variety BARI Gom-19 and the minimum was found in  the  variety  BARI  Gom-21.  The  grain yield as well as the other yield contributing characters produced by   BARI Gom-21 was the highest among the studied varieties. The highest percent inhibition for all of the  weeds  was  found  in  hand  weeding treatment. The second highest percent weed inhibition was occurred in aqueous extract of sorghum crop residues @ 1:20  ratio  (w/v)  treatment  which was 51.81, 51.10, 52.90, 55.58, 75.27, 73.83 and 53.85 percent for bathua (Chenopodium album), mutha (Cyperus rotundus), durba (Cynodon dactylon), biskatali (Polygonum hydropiper), angta (Paspalum scrobiculatum), tit begun (Solanum torvum) and shama (Echinochloa crusgalli) respectively. The highest loss of  grain yield  was  obtained  where no aqueous extract  of  sorghum  crop  residues  were  used.  The  highest yield and yield attributes were observed where hand weeding is  done  followed by the application of aqueous extract of sorghum crop residues @1:20  ratio  (w/v).  Wheat  var.  BARI  Gom-21  with   all   treatments produced the highest grain and straw yield among  the  treatment  combination. The results of this study indicate that different amount  of  aqueous extract of sorghum crop residues showed potential activity to  suppress weed growth and it has significant effect on the yield of wheat. Therefore, aqueous extract of  sorghum  crop  residues  might  be  used  as  an alternative way for weed management in effective and sustainable crop production.

  Wheat, Inhibition (%), Yield and harvest index. Sorghum, Biskatali, Bathua, Tit begun
  Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh
  00-11-2016
  00-03-2017
  Crop-Soil-Water Management
  Weed management, Wheat

To  determine  the optimum dose of aqueous extract of  sorghum  crop  residues  for  the  establishment of an easy, economic and sustainable method for efficient weed management and better yield of wheat.

The experiment was carried out at the Agronomy Field Laboratory of Bangladesh Agricultural  University,  Mymensingh  from  November  2016  to   March   2017,  located at 24°75' N  latitude  and  90°50'  E  longitude  at  an  elevation  of  18  m  above the mean sea level  characterized  by  non-calcareous  dark  grey  floodplain  soil belonging to the Old Brahmaputra Floodplain, (AEZ-9). The soil of  the experimental  field  was  more  or  less  neutral  in  reaction  with  pH  value  6.8,  low  in organic matter and fertility  level.  The  land  type  was  medium  high  with  silty  loam in texture. The experiment consists of two factors including crop residues (5) i) No use of extract (control), ii) Aqueous extract of sorghum crop residues @ 1:20   ratio   (w/v),   iii)   Aqueous   extract   of   sorghum   crop   residues   @   1:30   ratio (w/v),   iv)   Aqueous   extract   of   sorghum   crop   residues   @   1:40   ratio   (w/v)   and   v) Hand weeding and wheat variety (3): i) BARI Gom-19 (Sourav) ii) BARI Gom-21 (Shatabdi) iii) BARI Gom-24 (Prodip).  The  seeds  were  sown  on  21  November, 2016 as per treatment  specifications.  The  experiment  was  laid  out  in  a  randomized complete block design with three replications. Thus  total  numbers  of plots were 45.  Each  plot  size  was  (2  m x 2.5  m).  The  distance  maintained  between the individual plots was 0.5 m  and  the  distance  between  the  replication was 1.0 m. After collection, the crop residues were dried under shade in the covered threshing floor of Agronomy Field Laboratory of BAU. The studied crop residues were cut as small as possible by using sickle. The small pieces of sorghum crop residues were dipped into water for 24 hours and then collected the aqueous extract from residues.  The prepared sorghum aqueous extract was applied two times (20 days and 40 days) after seed sowing by a hand sprayer and harvesting was done in 8th march, 2017. Data were collected on the basis of different parameters of wheat and weeds. Among them percent inhibition shows the suppressing ability of aqueous extract of sorghum residues on weed. Inhibition (%) = Dry weight of weed at control - Dry weight of weed from treatment/Dry weight of weed at control x 100. Data were also collected from wheat on  yield  basis  such  as  grain  yield,  straw  yield, harvest index etc which showed the  yield  performance  of  wheat.  The  recorded data were compiled and tabulated for statistical analysis. Analysis  of  variance was done with the help of computer package,  MSTAT-C  program.  The  mean differences among the treatments  were  adjudged  by  Duncan’s  Multiple  Range Test.

  Bangladesh Agron. J. 2018, 21(2): 87-95
  DOI: https://doi.org/10.3329/baj.v21i2.44497
Funding Source:
1.   Budget:  
  

From the above results it was found that the wheat var. BARI Gom-21 with C4 (hand weeding) treatment exhibited the superior effect and BARI Gom-21 with C1 showed quite close result with it. Results of the present study reveal that application of aqueous extract of sorghum crop residues has positive effect on yield for most of the studied traits. It also shows that aqueous extract of sorghum crop residues have herbicidal activity for suppressing weed growth and there is immense prospect of sorghum crop residues as a weed management tool. Therefore, aqueous extract of sorghum crop residues could be a prospective source of weed control tool for crop production in modern agricultural science which minimizes cost of production, environmental pollution, unsafe agricultural production, human health concerns, soil sickness and depletion of crop diversity.

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