PJB-2024-424
Khalid Hussain
Abstract
It has been well established that known Indole acetic acid (IAA) can be sued for the improvement of various crop growth and yield. Similarly, micronutrients as Boron (B) are also essential for healthy crops. IAA and B have been studied separately (straight) for maize crop but its blended (combined) applications have not been reported for maize crop. Due to this research gap, experiments were performed to evaluate the IAA and B applications in two maize varieties (Pak-Afgoi and Golden) at University of Gujrat, Pakistan. Six levels of IAA and B were applied as straight and blended after 21 days of germination. It was noted from the results that foliar applications of IAA and B improved the growth and crop productivity of maize. Results indicated that maximum increase in morphological attributes i.e. plant height, fresh and dry weights of shoot and root, no. of leaves, leaf area, relative growth rate and net assimilation rates was noted at 30 ppm IAA and Boron. Quality and photosynthetic pigments i.e. Chl. a, b and total chl. carotenoids, antioxidents acitivities i.e. catalase (CAT) and peroxidase (POD), carbohydrates and proteins contents were improved under IAA and B applications. Foliar spray of Indole acetic acid and Boron also improved yield parameters (no. of cobs and seeds and yield). Golden variety showed promising results as compared to Pak-Afgoi. It was concluded that foliar application of IAA with B could be used to improve morphological, biochemical and yield parameters in maize but its (IAA+B) blended application can be superior over straight applications.
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