الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
A pot experiment was conducted at a green house at faculty of agriculture, Mansoura University, during 2003 and 2004 seasons to study the using of Kochia and Echinochloa crusgalli for reclamation the salt affected soils. Soil samples collected from two locations: 1 Al tena area: This area is new reclamation site located on south of Port Said near of Manzala lake and three samples with different salinity were taken. A) Low on salinity EC 4.42 dS m1 and uncropped before. B) Planted before since (6years) and the salinity of this sample is 7.51 dS m1 . C) High in salinity EC 15.17 dS m1 and this sample produce many crops such as rice, wheat and sugar beet. 2 Kalabsho area: This area is new reclamation site located on Dakahlia governorate and it?s near of the sea three samples were taken and different on its salinity as follow: a) Salinity was 1.09 dS m1. b) Salinity was 2.04 dS m1. c) Salinity was 18.00 dS m1. In this study two plants are namely Kochia and Echinochloa crus galli were planted. The obtained results could be summarized as follows: Kochia plant is more tolerant than Echinochloa crus galli, where Kochia can tolerate the salinity up to EC = 18 dS m1 while Echinochloa can tolerate up to EC = 4.42 dS m1. Both plants led to reduce the soil salinity harvesting. Changes of soil EC, soluble cations and soluble anions under different soil salinity as affected by Kochia cultivation Soil salinity were decreased after cultivation of Kochia under clayey and sandy soils. Soluble cations (Na+, K+, Ca++, and Mg++) were decreased after cultivation of Kochia under clayey and sandy soils. Soluble anions (CO3, Cl, and SO4=) were decreased after cultivation of Kochia under clayey and sandy soils, Except, (HCO3) which was increased. Changes of soil EC, soluble cations and soluble anions under different soil salinity as affected by Echinochloa crus galli cultivation Soil salinity were decreased after cultivation of Echinochloa crus galli under clayey and sandy soils. Soluble cations (Na+, K+, Ca++, and Mg++) were decreased after cultivation of Echinochloa crus galli under clayey and sandy soils. Soluble anions (CO3, Cl, and SO4=) were decreased after cultivation of Echinochloa crus galli under clayey and sandy soils, Except, (HCO3) which was increased. Effect of soil salinity on nutrient concentration and their uptake in Kochia Plants: N, P, and K concentration and its uptake of Kochia plant were decreased with increasing different soil salinity during seasons 2003 and 2004. Ca, and Mg concentration and its uptake of Kochia plant were decreased with increasing soil salinity, while Na was increased with increasing soil salinity levels during seasons 2003 and 2004 Effect of soil salinity on nutrient concentration and their uptake in Echinochloa crus galli Plants: N, P, and K concentration and its uptake of Echinochloa crus galli plant were decreased with increasing the levels of soil salinity during seasons 2003 and 2004. Ca, and Mg concentration and its uptake of Echinochloa crus galli plants were decreased with increasing the levels of salinity, while Na was increased with increasing the levels of soil salinity during seasons 2003 and 2004. Effect of soil salinity levels on fresh and dry weight of Kochia Plants: Results show that the fresh and dry weight of Kochia plant during both seasons decreased with increasing salinity levels under both texture clayey and sandy soils. Effect of soil salinity levels on fresh and dry weight of Echinochloa crus galli Plant: Results illustrated that the fresh and dry weight of Echinochloa crus galli plant during both seasons were decreased with increasing salinity levels under both texture clayey and sandy soils. CONCLUSION In view of the obtained results, it can be concluded that Kochia and Echinochloa had tolerance to soil salinity. Kochia has tolerance to salinity under sandy soil up to 18 dS m1 and 15.17 dS m1 in clay soil. Decreasing of soil salinity was observed after cultivation of Kochia and Echinochloa but after Kochia cultivation, the soil salinity was more decreased as compared to Echinochloa planted. It can be concluded that frequency of Kochia cultivation decreased soil salinity than Echinochloa cultivation in salt affected soil. Generally, Kochia is suitable to reclaim salt affected soil which common in Egypt.