• Muhammad Bilal Chattha

• Muhammad Umer Chattha

• Muhammad Umair Hassan

• Imran Khan

• Muhammad Nawaz

• Muhammad Aman Ullah Khan

• Muhammad Aamer

• Muhammad Usman

تلخیص

Plant growth promoting substances (PGPS) are being widely used in crop production to increase productivity and to overcome harmful effects caused by environmental stresses. The experiment was planned to evaluate the influence of PGPS on the growth, phenology and yield of spring maize. The growth promoting substances like kinetin (30 ppm), humic acid (2%), Moringa leaves extract (2%), salicylic acid (2%), ascorbic acid (2%), and water spray were applied twice as foliar sprays at 6 leaves and 8 leaves stage. Results showed that foliar application of kinetin, humic acid, MLE, ascorbic acid and salicylic acid significantly improved the growth, phenology and yield attributes of maize as compared to control. Results showed that maximum improvement in days to tasseling, leaf area index, crop growth rate and number of leaves per plant, grains per cob, 1000-grain weight, biological yield, and grain yield were recorded with the application of 2% ascorbic acid, however, the use of PGPS had no significant effect on the days to silking. Further, a maximum plant height was recorded with the foliar feeding of 2% humic acid. Moreover the highest value of chlorophyll (a, b) and total phenolic contents were recorded with kinetin (30 ppm). So, all tested PGPS were variable in their effect, however, they improved the plant performance and may be applied to improve growth and yield of maize.

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