الفهرس 
Effect of salts on vegetative growthOnly 14 pages are availabe for public view
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Abstract
A complete randomized, factorial pot experiment was c~trried outin the Experimental Fam of the Faculty of Agriculture, Tanta University, Rafr El-Sheikh to study the effect of 0, 1080, 2000 or 3800 ppm C1 in the irrigation wtiter on aome citrus rootstocl.cs. Sour orange, Cleopatxa mandarin and Troyer citrange rootstocks were used in this experiment. Na or Ca CI2 were used as sources for the dlfferen-t concentrations of Cl,ion to study salt eft fecte These plants were grown under these salt treatments either fo6~ o r 18 montha Before final analysis The effect of these treatments on the occurrence of visual symptoms indicating salt toxicity were recorded do the number of susvfvfng plants was determined* Moreover, plant height, trunk diameter, root length and their fmsh. and dry weights were determined. h~oreover,plan$ leaves, stems and roots nutrient content was analysede These nutrients included total N,P,K,Ca,Mg,Na,Cu,Zn,Fe and C1. amtomica1 study was also conducted to study the effect of these salt treatments on mture leaf, shoot and laterel root branches internal structure. The obtained results could be summerized in the following : - 1- Effect of s a l i n i t y on plant tolerance : a) The morphological f e a t u r e s t h a t appear on plant leaves, shoots with the progress of salt injury i n the three rootstocks were described . b) Survival of plants was dlspaired by both salt concentration and duration of treatment, It was alao observed t h a t sodium chloride was more harmful than calcium chlorZde at the same concentrationo I c) Sour orange was the most salt t o l e r a n t rootstock followed by Cleopatra mandarin citrange in d-ecreaaing order . 2- Effect of sallnity on plant vigor and f i n a l l y ’ Troyer Plants of a l l roots-tocks. reached the peak of t h e i r growth e a r l i e r aa the salt concentration vas increas ed* This e f f e c t was more pronounced in ~actlr e a t -ment ’than when CaCX2 was used . I r r i g a t i o n with salty water depressed plant growth. This e f f e c t w a s p o s i t i v e l y related to salt concentr a t i o n , and duration of t h i s treatment. The s e v e r i t y of salt injury was more r e l a t e d to C1 ion concentration to the salts t h a t were used . 3- Effect of salinity an some plant nutrients :- a) While Sour orange leaves accu~nulated more GI and less lga, Cleopatru mandarin accumulated more Na and less Cle b) The accumulation sf Na, C1 in plant tissues ws increased as their concentrations in the irrigation water increased up to a limit after which this accumulation decreased 1 c) Results indicated that leaf, stem or root N content vards inconsistently affected* No definite trend in this aspect could be observed . d) Salinity reduced the content of K,P in the tissues of the salt affected plant . e) Higher levels of Xg, Ca was found in the salt affected plantse Both salt concentration and durtztion of treatment had an effect in this respect f) Fe and Zn? were reduced by salinity treatments.Hawever Cu content of salt affected citrus rootstocks was inconsistent.