تأثير الكبريت الزراعي و كبريتات الأمونيوم في جاهزية النتروجين في التربة خلال مراحل مختلفة من نمو نبات الذرة الصفراء

الملخص EN

A field experiment was conducted during the fall season of 2007 Factorial experiment design was used Treatments included three levels of agriculture sulfur (95% S) which were 0, 500 and 1000 kg S.ha-1, three levels of ammoniuom-sulphate (N21%) 0, 120, 240 Kg N.h-1 .

were planted with corn seeds (Zeamays L.) Research 106 .

Available nitrogen in soil was measured during stages of plant growth at time 15, 30, 60 days of planting to study N behavior in soil.

As well the total dry matter of plant and N uptake by plant were calculated at stage (60 days).

Results showed addition of agriculture sulfur caused a significant increase in availability of N in soil and a highest values were at level of 1000 kg S.

ha-1 at stage 60 days mainterd in soil (42.57mg N.Kg-1) As well as caused a highest N uptake by plant achieved to (1138.46mg N.plant-1).

The results showed that addition of ammoniuom-sulphate a significantly affect availability N in soil and uptake nitrogen.

values were at level of 240 kg N.ha-1 at stage 60 days mainterd in soil (52.12mg N.Kg-1) As well as caused a highest N uptake by plant achieved to (1321.87mgN.plant-1).

The interaction effect sulfure and ammoniuom-sulphate a highest significant increasing of available N , total yield of dry matter and N uptake by plant achieved to (57.11mg N.Kg-1), (89.75gm.plant-1), (1947.57mg).