Comparison of three types of anti-stress and its effect on some vegetative growth characters, yield characters and the concentration of IAA and Peroxidase enzyme using protected Agriculture system

A field study was conducted during the fall season of 2016-2017 at the experimental station, horticulture and landscape gardening, College of Agriculture , Aljaderea , Baghdad, to study the effect of three types of anti-stress (super active, terra- sorb and humestar) interfere with soil fertilizer NPK18:18:18, as well as treatment of adding NPK fertilizer and control treatment on Sweet and chili Pepper. The data obtained was statistically analyzed by using the analysis of variance methods. Means were compared by using L.S.D. test at 5% level. The layout of the experiment was Randomized Complete Block. Design (RCBD) with three replicates to become the number of experimental units 15 for each cultivars of pepper.The results showed that the treatment of HNP was significantly superior compared to all the experimental treatments in the number of leaves of sweet pepper reached (193 leaf.plant-1). While the SNP treatment was significantly superior compared to other treatments in the number of leaves per plant of chili pepper and the relative content of the chlorophyll of both cultivars sweet pepper and chili pepper which reached (355 leaf.plant-1, 0.82 , 0.89) respectively. The results showed that TNP was significantly superior in leaf area (75.67 and, 47.75 dm2) for both sweet and sweet varieties. The SNP treatment significantly exceeded compared to other treatments by giving the highest concentration of IAA in both cultivars sweet and chili pepper There are significant differences (19.33 and 26.33) respectively.The results of table showed significant differences between the experiment factors in concentration of peroxidase enzyme in the leaves and fruits of the sweet and chili pepper. The two treatments of the control and the chemical fertilizer NPK were significantly superior compared to other treatments, with the concentration in leaves of sweet pepper (1.35 and 1.24) respectively, Fruits (1.75 and 1.65) respectively. The results of chili pepper were (1.30 and 1.19) in leaves and (1.65 and 1.55) in fruits respectively. While SNP treatment gave the highest number of fruits per plant of sweet and chili pepper which reached 22.8 and 40 fruits per plant, while NPK treatment was superior in fruit weight of both cultivars reached (39.39 and 9.14 gm) respectively, the highest singular plant yield of sweet pepper obtained from SNP treatment which gave (412.8 gm) while the treatment of chili pepper and NPK gave singular plant yield reached (280.4 gm).

Keywords:

super active , NPK , terra- sorb , Humestar