Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture
Khan, A., Nigar, S., Amanullah, A., Khalil, S., Ahmad, N. (2011). Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture. EKB Journal Management System, 2(1), 29-34. doi: 10.21608/eajbsh.2011.17009
Amir Zaman Khan; Shaheen Nigar; Amanullah Amanullah; S. K. Khalil; N. Ahmad. "Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture". EKB Journal Management System, 2, 1, 2011, 29-34. doi: 10.21608/eajbsh.2011.17009
Khan, A., Nigar, S., Amanullah, A., Khalil, S., Ahmad, N. (2011). 'Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture', EKB Journal Management System, 2(1), pp. 29-34. doi: 10.21608/eajbsh.2011.17009
Khan, A., Nigar, S., Amanullah, A., Khalil, S., Ahmad, N. Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture. EKB Journal Management System, 2011; 2(1): 29-34. doi: 10.21608/eajbsh.2011.17009

Physio-chemical quality of determinate and indeterminate soybean cultivars as influenced by canopy tempreture

Egyptian Academic Journal of Biological Sciences, H. Botany
Article 4, Volume 2, Issue 1, December 2011, Page 29-34  XML PDF (33.57 K)
Document Type: Original Article
DOI: 10.21608/eajbsh.2011.17009
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Authors
Amir Zaman Khan1; Shaheen Nigar2; Amanullah Amanullah3; S. K. Khalil3; N. Ahmad4
1-Department of Agronomy, Faculty of Crop Production Sciences, NWFP Agricultural University Peshawar-Pakistan
2Institute of development studies, NWFP Agricultural University Peshawar-Pakistan
3Department of Agronomy, Faculty of Crop Production Sciences, NWFP Agricultural University Peshawar-Pakistan
4PCSIR Laboratories, Khyber Road, Peshawar-Pakistan
Abstract
The objective of this study was to quantify the effects of canopy temperature on physiochemical quality of soybean planted on different dates. An experiment was conducted at the Agriculture Research Farm of the NWFP Agricultural University, Peshawar, during 2006 and 2007. Determinate cultivars (Epps, maturity group [MG] V) and indeterminate cultivar, Williams 82 [MG] 111) were planted on May 1st to August 1st at one month interval during both years. Data was recorded on canopy temperature and physio-chemical attributes of soybean. Heat indices were calculated from canopy maximum and minimum temperatures for the periods between growth stages starting from beginning of bloom to physiological Maturity (R3-R7). Physiochemical attributes were regressed on different heat indices. Canopy temperature during reproductive growth stages of R4-R5, R5-R6 and R6-R7 had pronounced effect on physiochemical quality of soybean. Increase in mean averaged temperature in the range of 23-30oC during growth stage of R6-R7 improved germination, field emergence, and increase seedling dry weight, protein and oil contents of soybean seed. Whereas, increase in mean temperature averaged in the range of 23 to 30oC during reproductive growth stage of seed beginning to full-seed (R5R6) reduced germination, field emergence, electrical conductivity, protein and oil contents of soybean seed. Increase in maximum temperature in the range of 32 to 37oC during growth stage of full bloom to seed initiation (R4-R5) decreased seedling dry weight and oil content of soybean seed. 
Keywords
seed quality; vigor; varieties; Canopy Temperature; and Reproductive growth stages
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