STUDY ON INFESTATION LEVELS AND SPATIAL DISTRIBUTIONS OF AMARANTHUS BLITOIDES, CHENOPODIUM ALBUM AND SOLANUM NIGRUM IN CORN FIELD

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

MOHAMMADVAND E.; RASHED MOHASEL M.H.; NASIRI MAHALATI MAHDI; POURTOUSI N.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Field Crops Research Year:2008 | Volume:6 | Issue:2 Page(s): 419-432

Download Full-Text

Persian Verion

View:

811

Download:

Cites:

Information Journal Paper

Title

STUDY ON INFESTATION LEVELS AND SPATIAL DISTRIBUTIONS OF AMARANTHUS BLITOIDES, CHENOPODIUM ALBUM AND SOLANUM NIGRUM IN CORN FIELD

Author(s)

MOHAMMADVAND E. | RASHED MOHASEL M.H. | NASIRI MAHALATI MAHDI | POURTOUSI N. | Issue Writer Certificate

Keywords

POPULATION DYNAMICSQ3

WEED MAPPINGQ3

SITE-SPECIFIC APPLICATIONQ3

2Q3

4-D+MCPAQ3

NITROGENQ3

Abstract

For increasing the effectiveness of weed management and more understanding of weed POPULATION DYNAMICS, spatial distribution needs to more attentions. Infestation levels and spatial distributions of Amaranthus blitoides, Chenopodium album and Solanum nigrum were studied in four 10x30 m corn fields. N-fertilizer was applied in two method of whole application at the time of corn planting (T1 and T2) and equal split application at the time of corn planting and at six-leaf stage (T3 and T4). One of either fields with the same method of N-fertilizer application, received herbicide too (T1 and T3). Weeds Samples were taken four times at the intersection of 2.5m square grids with 23days interval. The first sample was taken June 24, before top-dressing and herbicide application in related plots. For studying weed spatial distribution, the parameters of appropriate semivariogram model were calculated and weed contour maps were constructed by using kriging. The weed semivariograms fitted spherical and exponential models, over four sampling times and fields and spatial autocorrelation during growing season, was moderate to strong. In early growing season, Amaranthus blitoides was the dominant weed species in all fields, but lower density was recorded for Chenopodium album and Solanum nigrum. At the first sampling time, mean density of A. blitoides and S. nigrum in fields with split application of N-fertilizer was respectively more- and less than fields with whole application of N-fertilizer. In the case of C. album an evident difference wasn’t observed. Herbicide application in related plots considerably reduced the density of three mentioned species; however density never became zero. In the majority of cases the lack of herbicide application causes to increase in population density at the second sampling time. Spatial structure was observed in all three species and study on contour maps confirmed the existence of patches that the density was high in their center, but decreasing gradually toward edges. In general, despite of some displacement, structure and location of patches were kept and possibly these places were the locations for weed emergence in next year. So site-specific herbicide application and exploitation of its advantages may be possible; however, more researches are necessary.

Cites

References

بررسی الگوهای توزیع مکانی علف هرز اویارسلام بنفش (Cyperus rotundus) تحت مدیریتهای مختلف نیتروژن و علف کش در ذرت

Cite

APA: Copy

MOHAMMADVAND, E., RASHED MOHASEL, M.H., NASIRI MAHALATI, MAHDI, & POURTOUSI, N.. (2008). STUDY ON INFESTATION LEVELS AND SPATIAL DISTRIBUTIONS OF AMARANTHUS BLITOIDES, CHENOPODIUM ALBUM AND SOLANUM NIGRUM IN CORN FIELD. IRANIAN JOURNAL OF FIELD CROPS RESEARCH, 6(2), 419-432. SID. https://sid.ir/paper/119088/en

Vancouver: Copy

MOHAMMADVAND E., RASHED MOHASEL M.H., NASIRI MAHALATI MAHDI, POURTOUSI N.. STUDY ON INFESTATION LEVELS AND SPATIAL DISTRIBUTIONS OF AMARANTHUS BLITOIDES, CHENOPODIUM ALBUM AND SOLANUM NIGRUM IN CORN FIELD. IRANIAN JOURNAL OF FIELD CROPS RESEARCH[Internet]. 2008;6(2):419-432. Available from: https://sid.ir/paper/119088/en

IEEE: Copy

E. MOHAMMADVAND, M.H. RASHED MOHASEL, MAHDI NASIRI MAHALATI, and N. POURTOUSI, “STUDY ON INFESTATION LEVELS AND SPATIAL DISTRIBUTIONS OF AMARANTHUS BLITOIDES, CHENOPODIUM ALBUM AND SOLANUM NIGRUM IN CORN FIELD,” IRANIAN JOURNAL OF FIELD CROPS RESEARCH, vol. 6, no. 2, pp. 419–432, 2008, [Online]. Available: https://sid.ir/paper/119088/en

Related Journal Papers