Nabatia

NPK Fertilizer Effects on Growth and Flowering of Chinese Carnation

Mazin Amer Owain — Sat, 06 Jul 2024 00:00:00 +0000

This study investigates the impact of varying levels of NPK chemical fertilizers on the growth and flowering of the Chinese carnation plant (Dianthus chinensis). Conducted during the 2022–2023 academic year at the University of Tikrit's College of Agriculture, the experiment utilized a randomized complete block design (RCBD) with four treatments: no fertilizer, high nitrogen (47% N), high phosphorus (41% P), and high potassium (43% K). Key growth metrics, including plant height, leaf count, total chlorophyll content, flower count, and floral dimensions, were measured. Results indicated significant differences between treatments. High potassium fertilizer resulted in superior vegetative growth, with the highest leaf count (38.17 leaves per plant), wet weight (28.74 g per plant), and dry weight (6.05 g per plant). It also produced the most flowers (10.66 per plant). High nitrogen fertilizer notably increased chlorophyll content (12.14 mg/g wet weight), enhancing photosynthesis efficiency. These findings demonstrate that targeted nutrient application can optimize growth and flowering in Dianthus chinensis, with high potassium levels being particularly effective. The implications of this study suggest that precise NPK management can enhance ornamental plant production, contributing to horticultural practices and commercial flower cultivation. Future research should explore the long-term effects of these fertilizers and their environmental impact.

Generative Propagation of Teak (Tectona grandis. Linn. F sp.) Using Seeding Method

Salih Soood Yagoub — Sat, 06 Jul 2024 15:08:11 +0000

In the Diyla area, fourteen ground water samples were obtained for this study in high density polyethylene (HDPE) bottles that had been previously cleaned and filled with diluted HNO3. To prevent cross-contamination, the bottles were rinsed with the same water that would be used for the sample. Using normal procedures, each sample was examined for five parameters: TDS, Ca, Mg, No3, So4, and F (APHA, 1995). Using the Trimble Juno 3D Handheld, the sampling sites' geographic locations are gathered. Electrical Conductivity (EC) was used to compute Total Dissolved Solids (TDS). Spectronics 21 (Model BAUSCH AND LOMB) was used to measure nitrates (NO3-) and sulphates (SO4-2). Standard AgNO3 was used to estimate chloride (Cl-), and an Orion ion analyzer with an ion-selective electrode was used to analyse fluoride (F-). With the exception of pH and EC, all the parameters are presented in mg/l. The unit of EC expression is micro Siemens/cm.

The Effect of Shading, Vermicompost, and Chelated Iron on the Leaf Content of Certain Elements in Gardenia Plants

Zainab Kamal Mustafa Nuftji, Alaa Husein A-Q. Al -Bakkar — Sat, 06 Jul 2024 15:11:31 +0000

The study was conducted at a private nursery (Mohammed Nursery) located on the Erbil road during the 2022 agricultural season. The experiment was carried out on composite gardenia plants propagated by cuttings and grafted onto one-year-old rootstocks for a duration of 5 months from April 2022 to October 2022. The study aimed to investigate the effect of shading at two levels (0% and 75% direct sunlight, using a green net (Saran cover)), the addition of organic fertilizer (vermicompost) at two levels, and the application of iron fertilizer in the form of chelated iron at three levels (0, 0.1, and 0.2 g.L-1) on the leaf content of certain elements in gardenia plants. The shading effect at 75% resulted in a significant increase in leaf nitrogen content, reaching (1.72%) and iron content (73.94 mg.kg-1). The application of organic fertilizer at 25% also demonstrated a significant increase in leaf nitrogen content (1.75%), phosphorus (0.248%), potassium (1.36%), and iron (67.95 mg.kg-1). The use of chelated iron at a concentration of 0.2 g.L-1 showed a significant effect on most parameters, with the highest results in leaf nitrogen content (1.78%), phosphorus (0.256%), potassium (1.28%), and iron (78.45 mg.kg-1).