Impact of water deficit on critical period of pigweed (amaranthus retroflexus l. ) in sunflower

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.

Kayamarsi Z.; Kazemeini S. A.

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

Journal Paper

Paper Information

Journal: Iran Agricultural Research Year:2018 | Volume:37 | Issue:2 Page(s): 27-34

Download Full-Text

Persian Verion

View:

352

Download:

Cites:

Information Journal Paper

Title

Impact of water deficit on critical period of pigweed (amaranthus retroflexus l. ) in sunflower

Author(s)

Kayamarsi Z. | Kazemeini S. A. | Issue Writer Certificate

Keywords

Critical period of weed controlQ3

Acceptable yield lossQ1

Gompertz modelQ2

Logistic modelQ2

Abstract

The Critical period of weed control is a part of crop life cycle during which weeds must be kept weed-free to avoid yield losses due to competition. In order to evaluate the effect of deficit irrigation on critical period of redroot pigweed (Amaranthus retroflexus L. ) in sunflower (Helianthus annuus L. ), an experiment was carried out as split plot based on randomized complete block design with three replications at the experimental farm of College of Agriculture, Shiraz University, during 2010 and 2011 growing seasons. Factors were water deficit at three levels (100%, 75% and 50% of field capacity) as main plots and weed interference periods in weedy and weed-free plots at five sunflower growth stages (8-leaf, 12-leaf, head emergence, flowering and maturity) as subplots. Results showed that water deficit decreased grain yield and grain yield components in both years. Critical period of redroot pigweed in normal irrigation with accepting 5% yield loss in sunflower was 35-86 DAP (days after planting) in the first year and 49-94 DAP in the second year. By decreasing irrigation water to 75%FC and 50%FC, the length of critical period increased to 34-100 and 32-105 DAP in the first year and 50-101 DAP and 44-98 DAP in the second year of the study, respectively. Generally, our results showed water deficit extended the length of critical period of redroot pigweed in sunflower.

Cites

No record.

References

No record.

Cite

APA: Copy

Kayamarsi, Z., Kazemeini, S. A., & HAMZEHZARGHANI, H.. (2018). Impact of water deficit on critical period of pigweed (amaranthus retroflexus l. ) in sunflower. IRAN AGRICULTURAL RESEARCH, 37(2 ), 27-34. SID. https://sid.ir/paper/363070/en

Vancouver: Copy

Kayamarsi Z., Kazemeini S. A., HAMZEHZARGHANI H.. Impact of water deficit on critical period of pigweed (amaranthus retroflexus l. ) in sunflower. IRAN AGRICULTURAL RESEARCH[Internet]. 2018;37(2 ):27-34. Available from: https://sid.ir/paper/363070/en

IEEE: Copy

Z. Kayamarsi, S. A. Kazemeini, and H. HAMZEHZARGHANI, “Impact of water deficit on critical period of pigweed (amaranthus retroflexus l. ) in sunflower,” IRAN AGRICULTURAL RESEARCH, vol. 37, no. 2 , pp. 27–34, 2018, [Online]. Available: https://sid.ir/paper/363070/en

Related Journal Papers