Interactive effects of potassium and sodium on the growth and nodulating capacity of pea (Pisum sativum L) var: Merveile de Kelvedon under salt stress

The objective of the research is to evaluate the interactive effects of salinity and potassium salt on the growth and nodulating capacity. The experiment was conducted during the development of pea seedlings (Pisium sativum) var: Merveile Kelvedon, the test was conducted in a randomized complete block (split plot) with three levels of NaCl (S0: 0 , S1:50 , S2: 150) mMol, and two levels of potassium salt: potassium nitrate (KNO3) (N1: 20, N2: 40) mMol, and potassium acetate (CH3COOK) (A1:20 , A2: 40) mMol with four replicates grown in pots, under controlled conditions ,the work was executed on 48 experimentales units. The results are shown that treatment salts decreased significantly pigment chlorophyll (chla, Chlb, Chlt), leaf area (La), the number of nodules (Nnd ), root length and stem (Rl , Rs) and the dry weight of leaves and roots (Dwl, Dwr) with increasing levels of salinity, the content of potassium (K + ) and the selectivity coefficient (K / Na) of leaves and roots and the content of total nitrogen (TN) in the leaves is reduced with a high salinity concentration compared to the control, whereas the content of proline (Pro) and sugar (Sr) in the leaves and the content of sodium (Na + ) in the leaves and roots have been accumulated considerably when salinity levels are increased. The application of the two potassium salts in the soil potassium nitrate (KNO3) or potassium acetate (CH3COOK)) is removed deleterious effects of salinity .In comparing these two potassium salts we result, the level of potassium acetate (CH3COOK) (A2) increased the number of nodules (Nnd), total nitrogen (NT) in the leaves and the potassium content (K + ) in the shoots and roots, but potassium nitrate (KNO3) (N2) increased sodium content (Na + ) in the roots and the leaves compared to the other treatment one, we can conclude that the potassium acetate (CH3COOK) is a good fertilizer than potassium nitrate (KNO3) in saline conditions.