الفهرس 
Material and MethodsOnly 14 pages are availabe for public view
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Abstract
The results obtained could be summarized as follows; 1- Both, rice straw (up to 2.5%, w/v) and rice stubble induced a considerable stimulation in seed germination of tomato plants. But higher concentration of rice straw inhibited the germination. 2- Effect on growth can be variable in this investigation, the response of tomato seedlings to rice stubble and different concentration of rice straw was reflected in seedling growth. 3- The application of aqueous extract of rice straw (0.5-2.5%, w/v) and rice stubble to tomato seedling induced a stimulatory effect on the accumulation of estimated metabolites (carbohydrates, protein, free amino acids and proline), enzyme activities and phenolic contents. supplying tomato seedlings with concentrations more than 2.5% (w/v) cause inhibitory effect on the above mentioned parameters. The results of green house experiment of tomato and weed plants at different stages of growth due to the application of rice straw residues and stubble can be summarized as follows, 1-Rice straw up to 2.5% (w/w) and rice stubble mostly enhanced the different growth parameters of plant organs (root, shoot, flowers and fruits), of tomato and weed plants at different stages of growth. The incorporation of rice straw residues more than 2.5% (w/w) have an inhibitory effect on growth parameters throughout the different stages of growth. 2-The photosynthetic pigments content in all treated tomato and weed plants increased by the incorporation of rice stubble and rice straw up to 2.5% (w/w). The incorporation of high concentrations of rice straw induced an inhibitory effect on the photosynthetic pigments of both tomato and weed plants except Portulaca oleracea.
3-The treatment of tomato as well as weed plants with different levels of rice straw residue and rice stubble caused considerable changes in the accumulation of estimated metabolites ( carbohydrate, protein, free amino acids and proline) in addition to phenolic compounds and flavonoids in different plant organs at different stages of growth.4-Rice stubble and rice straw residue (0.5-2.5%, w/w) induced stimulatory
effect on growth criteria and biochemical components of both healthy and
infected tomato as well as weed plants. Further incorporation of rice straw
residue above 2.5% (w/w) has inhibitory effect in the previous parameters,
except in Portulaca oleracea at different stages of growth.