تأثير التسميد النيتروجيني و عدد الحشات في نمو الذرة البيضاء و حاصلي العلف الأخضر و الجاف

الملخص EN

Field experiment was conducted in Al-Muthanna province, during the autumn season of 2014 to investigate, the effect of (1, 2 and 3 cut) cutting frequency and different levels of nitrogen fertilizer (0, 200 and 400 kg N.

/ha) on green and dry fodder yield and some growth characteristics of Sorghum.

The results revealed that there was a significant effect for cutting frequency on green and dry fodder yield (70.83 and 25.86 ton/ha, respectively), besides the substantial effects on plant height, stem diameter, green fodder yield and dry, as compared to cutting 2 and 3.

It was 48.31 and 13.41 ton /ha in cutting 2 while in cutting 3 was 22.94 and 8.9 ton/h for both green and dry fodder yield.

The nitrogen level of 400 kg N.

/ha gave high significant value in green and dry fodder yield that were 64.37 and 21.14 ton/ha, respectively.

Interaction between the nitrogen fertilizer and cutting number gave significant value in green and dry yield, 3 cutting and 400 kg nitrogen fertilizer gave the highest yield of green and dry yield which were 92.84 ton /ha and 38.75 ton /ha compared with treatment one cutting and zero nitrogen that gave the lowest in green and dry fodder yield that were 14.67 ton/ha and 10.7 ton /ha respectively.

Interaction between one cut and the level of 400 kg N.

/ha gave highest green fodder yield and dry.