تأثير التسميد المعدني على مقاومة بعض أصناف الشعير (Hordeum vulgare L)‎ للرقاد

الملخص EN

This study was carried out at Abi Jarash Farm, Faculty of Agriculture - University of Damascus, during the two growing season 2016/2017, 2017/2018.

Seven varieties of barely were grown according to the Experimental design, split block, with three replications, in order to evaluate resistance of some barely varieties to lodging under mineral fertilization based on some traits, such as : stem length, number of productive tillers, spike length, wall thickness, stem diameter, length of second internode.

The result showed that barley plant resistance to lodging affected by the anatomical characteristics of the stem, especially stem diameter and wall thickness.

The genotype Acsad 1713 was recorded the highest values in both of stem diameter and wall thickness (473.4, 47.41 micrometer, respectively) surpassed the other varieties under study, and has the lowest value of number of spikes.plant-1 (4.31 tiller.

Plant-1), and spike length (5.90 cm).

While the results indicated that the added fertilizer treatment (F7 : N80P80K150) recorded the highest values for the two following traits; stem diameter (418.8 micrometer), wall thickness (44.12 micrometer).

It was also noticed that the correlation was negative and highly significant between number of productive tillers and both of the stem diameter (r=-0.912**) and wall thickness (r=-0.859*).

While spike length was correlated positively and significant, with number of productive tillers (r= 0.839*) and negatively significant with length of second internode (r = 0.873*).