Effect of nano NPK application and proline spraying on vegetative growth characteristics of WONDERFUL pomegranate seedlings under salt stress

Abstract

The experiment was conducted in lathouse of the Department of Plant Production, Al-Musayyib Technical College for the period from 1/9/2021-1/5/2022. To know the effect of nano NPK  at three concentrations (150,75.0 mg L-1) and spraying of the amino acid proline at a concentration (300.0 mg L-1) on WONDERFUL pomegranate seedlings irrigated with four levels of saline irrigation water (9,6,3 ,1.3 dSm-1)The vegetative measurements (plant height, stem diameter, number of branches, length of branches, chlorophyll) were conducted. The research was conducted according to the CRD design with three replications, three seedlings for the experimental unit and three factors (4 * 3 * 2), the number of transactions was 24 for each replicate, the results were analyzed using the GENSTAT program according to the least significant difference test L.S.D under the probability level (0.05).The results showed that the salinity level 1.3 dSm m-1excelled in all the studied traits, as it gave a significant increase of (86.92 cm, 7.111 mm, 11.55 seedling branches-1, 19.14 cm, 30.58 SPAD), respectively, Also, the concentration of 150 mg L-1 of nano-NPK excelled in all vegetative traits, where it gave an increase of (77.79 cm, 6.779 mm, 9.85 seedling branches-1, 16.78 cm, 29.75 SPAD), and proline concentration 300 mg L-1 excelled in chlorophyll content and the number of branches