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Abstract
Two pot experiments were carried out during the two successive seasons of 2003/2004 and 2004/2005 in the wire house of Agric. Bot. and Plant Pathology Dept., Fac. Agric., Zagazig University, to study the effect of sewage sludge application, sewage water irrigation and their interactions on growth, yield, seed chemical composition and anatomical structure of lupine plants cv. Giza (1) under Egyptian conditions.
The obtained results could be summarized as follows:
1. Soil EC:
a. sewage sludge application or NPK mineral application at the recommended rate significantly increased soil EC before and after sowing
b. Application of 100 % sewage water to the soil significantly increased soil EC compared to irrigation with 50 % T.W. + 50 % S.W. and 100 % tap water alone.
c. The interaction between the two studied factors did not reflect any significant effect regarding soil EC.
2. Soil pH:
a. Addition of sewage sludge to the soil significantly increased soil pH.
b. Irrigation the soil with sewage water significantly affected soil pH both before and after sawing in the two seasons.
c. The interaction did not show any significant effect due to the interaction between both studied factors.
3. Plant height:
a. The tallest plant through the two growing seasons was obtained when adding 2 % sewage sludge.
b. Sewage water irrigation did not reach the level of significance among the studied levels of water during the two growing seasons.
c. The interaction effect between sewage sludge, and sewage water was insignificant during the two studied seasons and three growth stages intervals, except at 60 days after sowing in 2nd season.
4. Root length:
a. The tallest root through the three sampling dates was obtained when adding mineral nutrients NPK recommended dose and control followed by fertilization with 0.5 % sewage sludge.
b. Irrigation with 50 % T.W. + 50 % S.W. or 100 % S.W. recorded maximum root length compared to 100 % tap water.
c. The interaction effect between sewage sludge and sewage water were not significant in 2nd season but data showed significant effect in 1st season specially in 60 and 90 days after sowing.