Impact of different nitrogen levels on maize (Zea mays L.) growth and yield
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Abstract
The macronutrient that is crucial for improving crop development and yield is nitrogen. The effects of various amounts of external nitrogen transport on maize growth and yield characteristics are examined in this study. The field study was conducted at the Latif Farm in Tando Jam, Sindh Agriculture University. The study investigates how different levels of nitrogen addition affect the growth and production of maize. This study investigated six different nitrogen fertilization levels: 0, 60, 90, 120, 150, and 180 kg/ha urea. For each plant, the maximum leaf area (205.00 cm2) and plant height (208.50 cm) were measured. The results were as follows: Each plant produced 125 maize cobs. 180 kg of nitrogen fertilizer per hour is T6. The data indicates that there are 512.77 ears per plant, 326.20 ears' weight, 3.61 stem diameter, 6.11 green fertilizer t/ha productivity, 37.27 yield index, 38.22 chlorophyll content, and 10.11 dry matter productivity. An increase in seed yield of 20% compared to no nitrogen fertilization demonstrated the positive effect of nitrogen fertilization. On the other hand, the control group (T1 = no fertilizer) exhibited the lowest values: the plant height was 90.01 cm, the leaf area was 120.00 cm2, the number of cobs per plant was 1.02, the number of grains per plant was 400.20, the 100-grain weight was 284.11 g, the stem diameter was 2.50 cm, the green fodder yield was 3.88 t/ha, the harvest index was 21.60, the chlorophyll content was 17.60, and the dry matter yield was 4.70 (T1 = no fertilizer).
Keywords: Different; Growth; Levels; Maize; Nitrogen