Volume 14, Issue 68 (vol. 14, no. 68 2025)
2025, 14(68): 215-226 |
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Ali R, Sayfzadeh S, Valadabadi A, Shahsavari N, Zakerin H. The effect of simultaneous application of biofertilizers and nitrogen-containing chemical fertilizers on physiological traits and yield of late-crop sweet corn
(Zea mays L. saccharata) in the Takestan region. Plant Process and Function 2025; 14 (68) : 13
URL: http://jispp.iut.ac.ir/article-1-2123-en.html
URL: http://jispp.iut.ac.ir/article-1-2123-en.html
1- Department of Agronomy, Tak.C., Islamic Azad University, Takestan, Iran
2- Department of Agronomy, Tak.C., Islamic Azad University, Takestan, Iran ,saeedsayfzadeh@yahoo.com
3- Department of Crop production, Haj.C., Islamic Azad university, Hajiabad, Iran
2- Department of Agronomy, Tak.C., Islamic Azad University, Takestan, Iran ,
3- Department of Crop production, Haj.C., Islamic Azad university, Hajiabad, Iran
Abstract: (105 Views)
This research was conducted with the aim of investigating the effect of biofertilizers and nitrogen levels on the yield and some physiological characteristics of sweet corn under the conditions of delayed cropping and exposure to heat stress. This experiment was conducted as a factorial experiment as the base of a randomized complete block design with three replications. Planting dates were considered at two levels: d1: usual planting date of the region (June 15); d2: delayed planting date (July 15); application of nitrogen fertilizer at two levels: n1: recommended amount of nitrogen (300 kg.ha-1) and n2: 20% less than the recommended amount (240 kg.ha-1); and the use of bio-fertilizer at four levels: b1: no bacteria (control), b2: bio-super phosphate, b3: azotobacter + azospirillium + Pseudomonas, and b4: azotobacter + bio-sporphosphate. The results showed that the effect of delayed cropping on the physiological traits and yield of sweet corn was significant. The results of the comparison of the averages of the interaction of planting date × nitrogen × biofertilizer on proline content showed that at both levels of nitrogen consumption (240 and 300 kg/ha), the proline content in all biofertilizer treatments was higher on the second planting date than on the June 15 planting date. Although the use of biofertilizers significantly reduced the content of proline, which seems to be a physiological response to improve plant conditions against heat stress. Also, the Azotobacter + Azosprilium + Pseudomonas treatment had the highest seed yield, with an average of 2219.8 kg.ha-1. In the conditions of consumption of 240 kg.ha-1 of nitrogen, the use of the combination of biofertilizers compensated for the decrease in yield caused by the lower consumption of chemical nitrogen fertilizers. The results of the comparison of the mean interaction of the year × nitrogen effect showed that in the first year, due to the suitability of the air temperature for growth, the leaf area index increased relatively compared to the second year.
Article number: 13
Type of Study: Research |
Subject:
thermal stress
Received: 2024/09/26 | Accepted: 2025/04/15 | Published: 2025/10/29
Received: 2024/09/26 | Accepted: 2025/04/15 | Published: 2025/10/29
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