تأثير التغذية بالحامضين الأمينين "الأرجنين و السستاين" و نترات البوتاسيوم في نمو وحاصل نباتات الطماطة النامية في البيوت البلاستيكية

الملخص EN

An experiment was conducted during the winter growing season of 2013/2014 in unheated plastic house conditions belonging to tomato development project in Khor Al- Zubair / Agriculture Directorate of Basrah.

The aim was to study the effect of foliar spraying of the aim was to study the effect of foliar spraying of two amino acids (arginine and cysteine) and potassium nitrate (KNO3) on s growth and yield of tomato Lycopersicon esculentum Mill.

cultivar" Wogdan".

The study included fifteen treatments which were the combinations of five treatments [i.e.

Amino acids arginine and cysteine at (75 and 150) mg.

l-1 of each of them in addition to the control treatment (used water only)] and KNO3, at three concentrations (0 ,1.0 and 1.5) g.

l-1 applied by spraying four times at 15-day intervals started three weeks after transplanting.

Results showed that spraying with arginine at both concentrations and cysteine at 75 mg.

l-1 significantly increased leaf area per plant as compared with control treatment.

Spraying with arginine at 150 mg.

l-1 gave the highest values for nitrogen, potassium concentrations, whereas spraying with arginine at 75 mg.

l-1 gave the highest value for phosphorus concentration in the leaves.

Spraying with arginine at both concentrations and cysteine at 75 mg.

l-1 significantly increased total soluble carbohydrate in the leaves spraying with arginine and cysteine at 75 mg .l-1 of each of them increased fruit setting percentage as compared with control treatment.

Spraying with arginine and cysteine at 75 mg .l-1 of each of them increased early yield per plant as much as 11.12 and 10.31%, and total yield per plant as much as 13.12 and 11.87 % as compared with the control treatment, respectively.

Spraying with KNO3 at 1 and 1.5 g.

l-1 significantly increased all parameter studies as compared with control.

The most effective treatment was 1.5 g.

l-1 KNO3.

Spraying with cysteine at 75 mg.

l-1 and KNO3 at 1.5 g.

l-1 gave the highest total yield per plant by 3.972 kg, whereas control treatment gave the lowest by 2.159 kg.