Vol. 5, Issue 2 (2020)
The effect of fertilizers on the percentage of total carbonate minerals on the sunflower (Helianthus annuus L.)
Author(s): Dr. Raid SH Jarallah, Maha Hussein Hashem
Abstract: This study was carried out in plastic pots to study the effect of organic fertilizer, mineral fertilizer, and humic acid on the presence of carbonate minerals in the rhizosphere and bulk soils after (30, 60, and 90) days from planting the sunflower plants. The experiment was designed according to the Complete Randomized Design (C.R.D). The treatments included mineral fertilization (160) kg.N.h-1, symbolized by (M) and organic fertilization (poultry waste) at the level (10) tons.h-1, symbolized as (O). Humic acid was applied at the level (450) kg.h-1, symbolized by the symbol (H) a local variety of sunflower seeds (Helianthus annuus L) planned in pots on July, 13th, 2018. The present that the fertilizing type (mineral, organic and humic acid) plays a big role in the percentage of total carbonate minerals. The percentage of carbonate minerals in the soil of rhizosphere statistically decreased with the organic fertilization treatment as compared to the treatments of mineral fertilization and humic acid at the 30-day period of planting. The highest statistical decrease occurred with the treatment MHO (24.33) as compared to the comparison treatment. After (90) day period, into the sunflower rhizosphere, the values were lower than the treatment for O and MH, with significant differences compared to the treatment of mineral fertilization and non-significant from the treatment of humic acid. The percentage of total carbonate minerals decreases with time as plant growth continued and the highest values were recorded in bulk soils.