استجابة الباذنجان المزروع في البيوت المحمية للعناصر المغذية العضوية و الكيميائية

Abstract EN

An experiment was carried out in plastic house units – Horticulture department – College of Agriculture – Baghdad University (Abu Ghraib) during 2011 – 2012 and 2012 – 2013 growing seasons aimed to study the effect of organic fertilization on reducing chemical fertilizers quanlity and their effect on growth and production of eggplant(Hybrid Barcelona).

Randomized Complete Block Design (RCBD) with three replicates were used.

An experiment contained 14treatments, the treatments without fertilization (A1) and chemical fertilizer as recommended (NPK) with Cow manure at the rate of 5 % of soil volume(A2)were considered as contral.

Therefore, the treatments results of other treatments(12 treatments) compared with them, six treatments (level of organic fertilizer Biotron S + level of chemical fertilizer NPK) were A3 (100% +50%), A4 (100% + 0%), A5 (150% + 50%), A6 (150% + 0%), A7 (200% + 50%) and A8 (200% +0%).

and six treatments like them with spraying organic fertilizer Vegeamino (1 ml.L-1) were A9, A10, A11, A12, A13 and A14 sequentially .

The results of An experiment showed that reduced level of chemical fertilizer in the two treatments(A13 and A11) and chemical fertilizer as recommended (A2) gave the highest increases in concentration of elements (Fe, Mn and Zn) in the leaves and gave a significant increases in most characteristics such as vegetative growth, flowery, yield and quality of fruits compared with most other treatments.

The treatment A13 was recorded as the best treatment among treatment combinations on total leaf area in first season(419.8 dcm2), dry weight of shoot(402.5 and 404.6 g.plant-1) and number of flowers per plant(140.7 and 139.6 flower.plant-1) for both seasons respectively.

A13 treatment also gave the highest values in fruit weight and total yield with an increment of 46.0% and 160.8% respectively in the first season as compared with the control(A1) whereas in the second season it’s gave values were close to highest values in above characters given by A2 treatment with an increment of 41.2% and 135.5% respectively as compared with the control(A1).

The treatments that reduce of Chemical fertilizer (A3- A14) distinguished with reduce of nitrate concentrate in fruits for both seasons.