تأثير الرش الورقي بمستخلص الطحالب البحرية عند مستويات عديدة من التسميد المعدني في نمو وإنتاجية نباتات صنف البطاطا العادية (فريدا)‎

الملخص EN

This research was conducted in spring season of 2018 at the agricultural scientific research center in Homs in order study respons of potatoes plants (Cultivar Farida) to foliar spray with seaweed extract, seaweed extract have been used in concentration of (2.5 ml.

L-¹), at a rate of three times, (20 days) intervals between them, and using several levels of fertilization of the proposed equation fertilization metallic after the analysis of the soil for spraying treatments (The first, second, third, fourth), respectively (75%, 50%, 25%, 0%), and found the following : - Response of plants to foliar spray and increasing significantly of vegetative growth (plant height, leaves number, area leaves) in the first treatment compared with the control, whereas were not significant differences among the rest spraying treatments and control.

- The first treatment of spray preeminence significantly on treatments (the third and fourth) in the qualities of productivity (number tubers, weight tubers, productivity), there were no significant differences among each of (the second treatment and control), (control and the third treatment).

Increase the content tubers of dray matter and starch in the first treatment and it preeminence significantly on control, whereas were not significant differences in content tubers of protein.