تأثير نوعية المياه والرش بالاسكوربك اسد و الاوسموستراس في نمو وحاصل الذرة الصفراء (Zea mays L)

Effect of Water quality and spraying with Ascorbic Acid and Osmosterase on the growth and yield of Maize(Zea mays L.)

Abstract

A field experiment was conducted in the spring season of 2021 AD at Ibn al-Bitar Vocational High School located in the Al-Otaishi area of ​​Al-Hussainiya district of the Holy Karbala Governorate in Iraq to study the effect of irrigation water quality and foliar feeding (spraying with ascorbic acid and osmosterase) on the growth and yield of maize. Zea mays L. The randomized complete block design (RCBD) and the arrangement of split plates was chosen as a factorial experiment with two factors, the first factor included the quality of irrigation water at three qualities (A1, A2 and A3), while the second factor was foliar spraying on the vegetative total of maize plants with two concentrations of Ascorbic acid (500 and 750) mg L-1, as well as spraying with two concentrations of osmosterase (300 and 600 ) ml L-1 in addition to the comparison treatment, which is spraying with distilled water for one time only. And by three replications.
The results of the first factor A (water quality) showed that the average treatment A1 (irrigation with river water) was superior to the highest value in the following studied traits (plant height 243 cm, leaf area 61.71 cm2, chlorophyll content 50.113 SPAD, number of corn cobs in the experimental unit 30.93 corn cob and length of corn cob is 20,533 cm, the diameter of corn cob is 4.027 cm, the number of rows in corn cob is 17,600 rows, the average grain yield is 170.1 gm plant-1, the average total grain yield is 9.167 tons ha-1, the weight of 500 grains is 132.13 g, and the dry weight is 1.800 kg. 1 The biological yield is 19.088 tons ha-1 the protein content is 10.387 g. The results also indicated the superiority of treatment A2 (irrigation with puncture water), as it reached its highest value in the following studied traits (harvest index 58.722 % proline content 0.986 mg kg-1, and the activity of the enzyme superoxide dismutase enzyme SOD 56.505 absorption units Ml-1).
While the results of the second factor showed the superiority of treatment C2 (spraying with ascorbic 750 mg L-1) in the following studied traits (plant height 247 cm, number of corn cobs in the experimental unit 31.56, corn cob diameter 4.100 cm, number of rows in corn cob 17,222 rows, and the number of grains per Row 37.22 grains , total number of grains per corn cob 643.2 grains , dry weight 1.867 kg plant-1, biological yield 19.780 tons ha-1 , protein content 10.467 gm, proline content 1.056 mg kg-1, activity of superoxide dismutase enzyme SOD 56.009 absorption units ml-1). The results also indicated the superiority of the C4 treatment (spraying with Osmostrace 600ml L-1) in the following studied traits (leaf area 59.59 cm2, chlorophyll content 50.722 SPAD, corn cob length 21.333 cm, average grain yield 178.8 gm plant-1, and average total grain yield 9.461 Tons ha-1, the weight of 500 grains is 130.00 g, and the dry weight is 1.867 kg Plant-1). The results of the interaction between factors A, water quality and C foliar feeding (spraying with ascorbic and osmostria), showed the superiority of treatment A1C2 (irrigation with river water and spraying with ascorbic 750 mg L-1) in the following studied traits (plant height 257.97 cm and number of corn cobs per unit). The experimental corn cob is 33.33 Cob , the length of corn cob is 21.677 cm, the diameter of corn cob is 4.267 cm, the total number of grains in corn cob is 676.7 grains, the average grain yield is 184.0 gm plant-1, the average total grain yield is 9.745 tons ha-1, and the biological yield is 22.260 tons ha-1 and the protein content is 11.033 g). The results also indicated the superiority of the treatment A1C4 (irrigation with river water and spraying with Osmostrace 600 ml L-1) in the following studied traits (leaf area 66.03 cm2 chlorophyll content 53.400 SPAD, weight of 500 grains 139.00 g, dry weight 2.050 kg Plant-1)