DETERMINATION OF YIELD AND YIELD COMPONENTS RESPONSE OF SOYBEAN (GLYCINE MAXL.) TO SWING DATE, TEMPERATURE AND SUNSHINE HOURS

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AGHAYARI F.; FARAJI A.; KORDKATOOLI A.

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Journal: AGROECOLOGY (بوم شناسی کشاورزی) Year:2015 | Volume:7 | Issue:4 Page(s): 547-562

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Title

DETERMINATION OF YIELD AND YIELD COMPONENTS RESPONSE OF SOYBEAN (GLYCINE MAXL.) TO SWING DATE, TEMPERATURE AND SUNSHINE HOURS

Author(s)

AGHAYARI F. | FARAJI A. | KORDKATOOLI A. | Issue Writer Certificate

Keywords

CULTIVARQ2

PHENOLOGYQ3

REGRESSION MODELSQ2

YIELD GAPQ3

Abstract

Introduction: Soybean (Glycine max L.) is one of the major sources to produce oil. Suitable sowing date makes optimum use of climate factors such as temperature, moisture and during the day. Soybean is not easily adaptable with soil and climate change, because its flowering and ripping depends on duration of daylight. Long days delays flowering process and short days causes acceleration of plant maturity. Temperature is one of the most important effective factors on the growth of any kind of plant (Caliskan et al., 2008). Related to the radiation effect on the plant growth, excessive studies have been done in the world. One of the necessary pre-conditions to get upper yield is making necessary conditions for optimal use of radiation (Muchow et al., 1990). Awareness of the effective factors on the yield of soybean can help us to get better management of the plant. Therefore, the goal of this research was to study the effect of sowing date, temperature and sunshine hours on the length of growth period, yield and yield components of soybean.Materials and methods: This research was performed to study the effect of sowing date, temperature, and sunshine hours on yield and yield components of soybean in the area of Aliabad-Katoul in Golestan province, during 2011-2012 cropping year. In this order, different soybean fields with different sowing date had been remarked in vast area of soybeanfields of Aliabad-Katoul area. In this study 30 soybean fields with Katoul (D.P.X) CULTIVAR and 30 soybean fieldswith Sari (J.K) CULTIVAR werte chosen. To assess the study traits (the length of different phenological periods, yield, and yield components) into each of field, 5 plots in zigzag pattern (S) had been chosen and in each plot, the study traits had been measured and the average of them was recorded for each field. The important soybeangrowth stages, including the start of flowering (R1), the start of pods of the plants (R3), the start of seedformation (R5), the start of physiological ripping (R7) and complete ripping (R8) was recorded (Fehr & Caviness, 1980).Results and discussion: In this study, phenological developments during growing period were influenced by the sowing date. There was a negative linear correlation between delaying of sowing date and growth duration as the 86% and 90% of the variation in the Katoul and Sari CULTIVARs justified, respectively. Delaying of sowing date of both CULTIVARs, reduced the yield. This negative significant linear relation explained 79% and 53% of changes in Katoul and SariCULTIVARs, respectively. The slope of the regression equation indicated that delaying of sowing date (days from20th June) reduced seed yield in Katoul and Sari CULTIVARs equal to 50.6 kg.ha-1 and 37.4 kg.ha-1 per day, respectively. The result showed that response of soybean yield components to the average of temperature during flowering and grain filling in both CULTIVARs was positive and significant, except for seed number per squaremeter in Sari CULTIVAR. Between mean temperature during starting flowering to starting grain filling and soybeanpod number per plant was a positive linear correlation as the 77 and 68% of the variation in the Katoul and Sari CULTIVARs justified, respectively. In addition, in this research it was observed that there was a significant relation between the total sunshine hours during flowering and grain filling and the components of soybean yield.Conclusion: The results of this study showed that sowing date had significant effect on plant traits such as seed yield. The majority of the study traits decreased due to delay of sowing date. Thus, in the study area sowing date is one of the most important effective factors on the growth and yield of soybean.

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APA: Copy

AGHAYARI, F., FARAJI, A., & KORDKATOOLI, A.. (2015). DETERMINATION OF YIELD AND YIELD COMPONENTS RESPONSE OF SOYBEAN (GLYCINE MAXL.) TO SWING DATE, TEMPERATURE AND SUNSHINE HOURS. AGROECOLOGY (بوم شناسی کشاورزی), 7(4), 547-562. SID. https://sid.ir/paper/211217/en

Vancouver: Copy

AGHAYARI F., FARAJI A., KORDKATOOLI A.. DETERMINATION OF YIELD AND YIELD COMPONENTS RESPONSE OF SOYBEAN (GLYCINE MAXL.) TO SWING DATE, TEMPERATURE AND SUNSHINE HOURS. AGROECOLOGY (بوم شناسی کشاورزی)[Internet]. 2015;7(4):547-562. Available from: https://sid.ir/paper/211217/en

IEEE: Copy

F. AGHAYARI, A. FARAJI, and A. KORDKATOOLI, “DETERMINATION OF YIELD AND YIELD COMPONENTS RESPONSE OF SOYBEAN (GLYCINE MAXL.) TO SWING DATE, TEMPERATURE AND SUNSHINE HOURS,” AGROECOLOGY (بوم شناسی کشاورزی), vol. 7, no. 4, pp. 547–562, 2015, [Online]. Available: https://sid.ir/paper/211217/en

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