La réponse physiologique et biochimique de la pomme de terre (variété Spunta) à la salinité enprésence de fertilisant organique (fumier des volailles) (Cas de Ouargla)

Abstract

Salinity is a major abiotic stress for the development of the potato, strategic culture in our country. To highlight the effect of organic fertilization on improving production and increasing tolerance of this plant to saline stress, an experiment was installed in the field on the farm "BABZIZ" (in the region of Ouargla located in the South East of Algeria), to compare the effect of four increasing doses of poultry manure (20, 30.40, 50 t / ha) fertilizers to treatment and a control without any input, the parameters of vegetative growth and yield, as well as the content of leaf chlorophyll and organic solutes and this, in three experimental sites at levels of increasing salinity, it is a little salty soil, saline soil and ground very salty. The results showed a significant increase in parameters of vegetative growth and yield response to increasing doses of poultry manure compared to treatment with mineral fertilizer and a control input of any fertilization. Every time, the best performance was recorded by the dose T6 (50t/ha VF) with a maximum yield at the site 445.91qx/ha the saltiest. In addition, analysis of variance on the accumulation of chlorophyll and of organic solutes has shown that increasing intake by poultry manure increased the concentrations of leaf chlorophyll and organic solutes, indicating the correct answer and confirms biochemical of potatoes to better withstand salt stress. The highest concentrations of organic solutes were also obtained with the dose (50 t / ha) and poultry manure, this whatever the level of salinity