تأثير الحراثة الدنيا و التقليدية في نمو و حاصل صنفين من الرز (عنبر 33 و فرات)‎

الملخص EN

This research was conducted in Najaf government – Abbasia region at summer season of 2009 .The aim of the research was to find out the effect of minimum tillage system with heavy offset disc harrows and conventional tillage system with mold board plow on the growth and yield properties of two variety of rice Oryza sativa L.

( Anbar 33 and Forat) .

The structure of the soil was silty clay loam .

Split plot design with RCBD was used to carry out this research with three replications .

The results showed that : the conversion from conventional to minimum tillage system with the Anbar 33 variety was led to a significant decreasing in root length , plant height , Productive tillers , Grains per Panicle , Sterility and panicle length which resulted in a significant decreasing in the seed yield of this variety .

Whereas the conversion from conventional to minimum tillage with the variety Forat did not show any significant differences in the root length , plant height , Productive tillers , Grains per Panicle , panicle length , Sterility , weight of 1000 grains and rice seed yield , it is mean we can use the minimum tillage with heavy offset disc harrows to prepare the soil for sowing Forat variety of rice crop.

Generally the minimum tillage system was exceeded the conventional tillage system in most research properties significantly .

Also Forat variety was exceeded Anbar 33 variety in most properties significantly .