Corn yield response to crowding stress and cropping season
Corn (Zea mays L.) is planted in two seasons per year in northern Iran (mid-April as a main crop and mid-June as a second crop). The main objective of this study was to determine whether corn yield response would differ between these two seasons and different plant populations. Two field experiments...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/23410/ http://psasir.upm.edu.my/id/eprint/23410/1/Corn%20yield%20response%20to%20crowding%20stress%20and%20cropping%20season.pdf |
| _version_ | 1848844750171406336 |
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| author | Moktharpour, Hassan Teh, Christopher Boon Sung Saleh, Ghizan Selamat, Ahmad Asadi, Mohammad Esmail Kamkar, Behnam |
| author_facet | Moktharpour, Hassan Teh, Christopher Boon Sung Saleh, Ghizan Selamat, Ahmad Asadi, Mohammad Esmail Kamkar, Behnam |
| author_sort | Moktharpour, Hassan |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Corn (Zea mays L.) is planted in two seasons per year in northern Iran (mid-April as a main crop and mid-June as a second crop). The main objective of this study was to determine whether corn yield response would differ between these two seasons and different plant populations. Two field experiments were conducted at the Agricultural Research Center of Golestan - Iran in 2007 and 2008 at different planting densities. The results showed that the values of grain yield and most traits were significantly lower in the second season. Maximum grain yield was observed at planting densities of 6.5 plants m -2 in the first season, whereas in the second season grain yield was the same for planting densities between 2.5 and 12.5 plants m -2. Based on the second-year experimental results, the following functions were fitted to show the relationship between yield ha -1 (Y) and planting densities (X) for the first and second seasons, respectively: (Y = -167.6X 2 + 2672.2X + 511.77; R 2 = 0.992) and (Y = 1200.1 ln(X) + 2924.4; R 2 = 0.935). This study found that the optimum plant population was 6.5 plants m -2 under low heat stress, and should be reduced to 2.5-4.5 plants m -2 under heat stress conditions. |
| first_indexed | 2025-11-15T08:35:53Z |
| format | Article |
| id | upm-23410 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:35:53Z |
| publishDate | 2011 |
| publisher | Taylor & Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-234102015-12-09T06:44:21Z http://psasir.upm.edu.my/id/eprint/23410/ Corn yield response to crowding stress and cropping season Moktharpour, Hassan Teh, Christopher Boon Sung Saleh, Ghizan Selamat, Ahmad Asadi, Mohammad Esmail Kamkar, Behnam Corn (Zea mays L.) is planted in two seasons per year in northern Iran (mid-April as a main crop and mid-June as a second crop). The main objective of this study was to determine whether corn yield response would differ between these two seasons and different plant populations. Two field experiments were conducted at the Agricultural Research Center of Golestan - Iran in 2007 and 2008 at different planting densities. The results showed that the values of grain yield and most traits were significantly lower in the second season. Maximum grain yield was observed at planting densities of 6.5 plants m -2 in the first season, whereas in the second season grain yield was the same for planting densities between 2.5 and 12.5 plants m -2. Based on the second-year experimental results, the following functions were fitted to show the relationship between yield ha -1 (Y) and planting densities (X) for the first and second seasons, respectively: (Y = -167.6X 2 + 2672.2X + 511.77; R 2 = 0.992) and (Y = 1200.1 ln(X) + 2924.4; R 2 = 0.935). This study found that the optimum plant population was 6.5 plants m -2 under low heat stress, and should be reduced to 2.5-4.5 plants m -2 under heat stress conditions. Taylor & Francis 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/23410/1/Corn%20yield%20response%20to%20crowding%20stress%20and%20cropping%20season.pdf Moktharpour, Hassan and Teh, Christopher Boon Sung and Saleh, Ghizan and Selamat, Ahmad and Asadi, Mohammad Esmail and Kamkar, Behnam (2011) Corn yield response to crowding stress and cropping season. Archives of Agronomy and Soil Science, 57 (8). pp. 853-871. ISSN 0365-0340; ESSN: 1476-3567 http://www.tandfonline.com/doi/abs/10.1080/03650340.2010.499901 10.1080/03650340.2010.499901 |
| spellingShingle | Moktharpour, Hassan Teh, Christopher Boon Sung Saleh, Ghizan Selamat, Ahmad Asadi, Mohammad Esmail Kamkar, Behnam Corn yield response to crowding stress and cropping season |
| title | Corn yield response to crowding stress and cropping season |
| title_full | Corn yield response to crowding stress and cropping season |
| title_fullStr | Corn yield response to crowding stress and cropping season |
| title_full_unstemmed | Corn yield response to crowding stress and cropping season |
| title_short | Corn yield response to crowding stress and cropping season |
| title_sort | corn yield response to crowding stress and cropping season |
| url | http://psasir.upm.edu.my/id/eprint/23410/ http://psasir.upm.edu.my/id/eprint/23410/ http://psasir.upm.edu.my/id/eprint/23410/ http://psasir.upm.edu.my/id/eprint/23410/1/Corn%20yield%20response%20to%20crowding%20stress%20and%20cropping%20season.pdf |