تأثير حامض الهيوميك و الكثافة النباتية على نمو و حاصل صنفين من الذرة الصفراء Zea mays L. : 1-الصفات الحلقية

العناوين الأخرى

Effect of humic acid and plant density on growth and yield of two varieties of maize (Zea mays L.)‎ : 1-field traits

المؤلفون المشاركون

خالد سعيد عبد الله
عباس عبد الله طه
الليلة، موفق جبر

المصدر

مجلة جامعة كركوك للعلوم الزراعية

الناشر

جامعة كركوك كلية الزراعة

تاريخ النشر

2019-12-31

دولة النشر

العراق

عدد الصفحات

17

التخصصات الرئيسية

العلوم الزراعية

الملخص الإنجليزي

A field experiment was conducted in the autumn seasons (2015) and the spring( 2016) at the agricultural research center of the colsteme of agriculture / university of kirkuk in al-sayada area south of kirkuk governorate, using three levels of humic acid (24,12,0 kg .

ha-1) and two maize varieties (zp684 and dracma) under the influence of four levels of plant density, which is (142857,95238,71428 and 57142 plant.ha-1), and distributed according to the design of the complete random sectors and in the order of three factors, which were identified by three replicates.

A number of field characteristics were studied for the maize, including: plant height, ear height, number of leaves, number of days of planting, up to 75% of male and female flowers, stem diameter, and leaf area index.

The results showed a significant overlap between the three factors studied for the autumn season in the effect of plant height, ear height, number of leaves and stem diameter, and did not significantly affect the leaf area index, the global treatment of the addition of humic acid has increased(24 kg .

ha-1) , low plant density (57142 plants .

ha-1) and (dracma) in the autumn season giving the highest rates of plant height (142.13 cm), height of ear( 55.27 cm), number of leaves (13.17 leaf .

plant-1) and stem diameter (21.35 mm) there was no overlap between the factors in the characteristics of the paper area index and the number of days from planting to 75% of male and female flowers.

In the spring season, the results showed a significant overlap between the three factors in the characteristics of plant height and the index of the leaf area and the height of the ear were not significant differences in the other studied traits.

The binary interaction was significant in all the attributes in the autumn season.

The (dracma) cultivar was characterized by low plants density (57142 plant .

ha-1) in plant height, ear height, stem diameter, and number of leaves in the autumn season, the two cultivars were significantly affected by plant height, leaf height and leaf area index in the spring season.

The number of leaves and diameter of the stem was not significantly affected by any binary interactions; it appears that the presence of humic acid has positively affected most of the studied traits.

This was evident in the level (24 kg .

ha-1) in giving the highest rates of plant height, height of ears, number of leaves, diameter of the stem and index of leaf area.

The level of comparison (without addition) was delayed to reach the stage of male and female flowering compared to the treatments added to the acid.

The Dracma cultivar was significantly superior in the number of leaves and the height of the essential ear and the leaf area index for both the autumn and spring seasons.

The different characteristics of ZP684 and Dracma differed in reaching the male and female flowering stage for both seasons.

The plants which planted in the low density took the lead in giving the highest values of plant height the diameter of the stem, the height of the ears, the number of leaves and the minimum time to reach 75% of male and female flowers.

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رقم السجل

BIM-1250849

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