تأثير عمق تواجد بذور الأدغال و اختلاف كميات الأمطار في إنبات و نمو دغل الحنيطة (Lolium rigidum L.)‎

الملخص EN

A pot experiment was conducted during growing season 2012-2013 to eva- luate the growth and seed production of (Lolium rigidum L.) which had grown under different environmental condition.

The study included two factors.

The first was (Lolium rigidum L.) seed burial in soil at (0.0 , 1 , 4 , 8) cm.

while the second factor, it was grown under different rainfall (300 , 400 , 500) mm.

The results showed that the seeds on soil surface or 1cm.

depth in soil had supperpass significantly in percentage of emergences than 4 or 8 cm.

depth in soil.

On other hand, plant that had emerged at different seed depth had not significantly in number of tillers .Plant that had emerged at (1 , 4)cm.

seed depth had significantly increased dry weight and seed production up to (50 , 55 , 47,6 , 51,4)% respectively if it compered with plants had grown from seed on soil surface.

However, 500 mm.

rainfall gave a good results in percentage of emergence, number of tillers, and dry weight per plant comparasion with (400 or 300) mm.

rainfall.

There is a gradually increasing in seeds production when the rainfall increased from 300 to 500mm.

The interaction between 400mm.

rainfall with seed on soil surface gave high percentage of emergences, Also 500mm.

rainfall with seed on soil surface gave high number of tillers, while 500mm.

rainfall with burial at 4cm.

in soil gave high Dwt of plant and high seedproduction.