DETERMINING OF CRITICAL PERIOD OF WEEDS CONTROL IN SOYBEAN (GLYCINE MAX L.) IN SARI REGION

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EFTEKHARI ALI; SHIRANIRAD AMIR HOSSEIN; REZAEI A.M.; SALEHIAN H.; ARDEKANI M.R.

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Journal: Iranian Journal of Crop Sciences Year:2006 | Volume:7 | Issue:4 Page(s): 347-364

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Title

DETERMINING OF CRITICAL PERIOD OF WEEDS CONTROL IN SOYBEAN (GLYCINE MAX L.) IN SARI REGION

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Keywords

WEEDSQ2

SOYBEANQ2

CRITICAL PERIODQ3

CONTROLQ4

INTERFERENCEQ4

Abstract

In order to determine CRITICAL PERIOD of WEEDS CONTROL in SOYBEAN a field experiment was carried out in Agricultural research station, Dashtenaz, Sari in 2003 cropping season. The experimental design was a complete Randomized block with 3 replications with 16 treatments. The treatment was included different stages without WEEDS, WEEDS competition during different plant phenological stages. The CONTROL treatment was WEEDS free and with WEEDS competition during growing season. Among recognized WEEDS species, Amaranthus retrofelexsus and Convolvulus arvensis had the maximum and minimum dry matter, at the rate of 47.2% and 2.3%, respectively. WEEDS dry matter also decreased significantly with increasing WEEDS free period. The WEEDS free period did not significantly affect on the stem nodules, seed dry weight and the number of grain per pods. The maximum number of pods per plant (85) was recorded in the CONTROL plot (WEEDS free). The minimum number of pods per plant (40) was recorded in the CONTROL plot (with WEEDS competition during growing season). The number of unfilled pods per plant, biological yield, seed yield and the number of sub branches per plant decreased significantly with increasing the period of weed INTERFERENCE. Therefore seed yield (570g/m2) in the CONTROL plot (WEEDS free) decreased (185g/m2) in the CONTROL plot (with WEEDS competition). It can be concluded that significant decrease in grain yield can be prevented by CONTROL of WEEDS between phenological stages V3 (25days after seeding) and R1 (52days after seeding). The trends of variation of seed yield in comparison to the CONTROLs, in this period (V3 to R1) showed that it has decreased from 99.3 % in FR1 80.76 % in FV11 treatment and from 98.59% in CV3 to 72.2% in CV7.

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APA: Copy

EFTEKHARI, ALI, SHIRANIRAD, AMIR HOSSEIN, REZAEI, A.M., SALEHIAN, H., & ARDEKANI, M.R.. (2006). DETERMINING OF CRITICAL PERIOD OF WEEDS CONTROL IN SOYBEAN (GLYCINE MAX L.) IN SARI REGION. IRANIAN JOURNAL OF CROP SCIENCES, 7(4), 347-364. SID. https://sid.ir/paper/57413/en

Vancouver: Copy

EFTEKHARI ALI, SHIRANIRAD AMIR HOSSEIN, REZAEI A.M., SALEHIAN H., ARDEKANI M.R.. DETERMINING OF CRITICAL PERIOD OF WEEDS CONTROL IN SOYBEAN (GLYCINE MAX L.) IN SARI REGION. IRANIAN JOURNAL OF CROP SCIENCES[Internet]. 2006;7(4):347-364. Available from: https://sid.ir/paper/57413/en

IEEE: Copy

ALI EFTEKHARI, AMIR HOSSEIN SHIRANIRAD, A.M. REZAEI, H. SALEHIAN, and M.R. ARDEKANI, “DETERMINING OF CRITICAL PERIOD OF WEEDS CONTROL IN SOYBEAN (GLYCINE MAX L.) IN SARI REGION,” IRANIAN JOURNAL OF CROP SCIENCES, vol. 7, no. 4, pp. 347–364, 2006, [Online]. Available: https://sid.ir/paper/57413/en

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