تقييم أثر استخدام الأصناف عالية الإنتاجية المستحدثة علي إنتاج محصول الأرز في مصر

Abstract EN

The research aims to measure the effect of using new high-yielding varieties on increasing the productivity of feddan productivity of rice crop by estimating the effect of varietal technology on the feddan productivity of rice crop and studying the economic impact of varietal change on the transmission of the supply function of the rice crop as well as determining the amount of increase in production by replacing of the high-yielding varieties by the low-yielding varieties.

The study utilized the covariance partitioning and the Harry Air-Edward Show model in estimating the transition factors in the resulting supply of different varieties of rice crop to evaluate the most important varieties of rice crop.

The results of the classification of rice crop varieties according to the productive merit at the level of the Republic as an average for the period (2015-2017) indicated that Sakha 107 variety.

Hybrid 1 variety ranked first in terms of productivity with an average of 4.6 tons/fed.

Each of Giza 179.

Sakha 101.

Giza 187.

Sakha 106 and Sakha 104 ranked second with productivity average of 3.9 tons/fed.

The third rank included Giza 177.

Sakha 102 and Sakha 103 with an average of 3.7 tons/fed and while Giza 171 variety occupied the fourth rank with an average of 3.2 tons/fed.

If the cultivated rice areas are distributed in Egypt according to the feddan productivity of each variety - so that increasing the areas of high productivity and reducing the areas of low productivity – this could lead to an increase in the total production of the rice crop in the light of the diversity in the cultivated rice varieties and the rise in the average production of feddan.

Therefore.

replacing Sakha 107 variety with the aforementioned varieties leads to an increase in the total production by 459 thousand tons and an increase in the value of production by 1797 thousand pounds.

Also.

replacing hybrid 1 variety with the aforementioned varieties leads to an increase in the total production by 737 thousand tons and an increase in the value of production by about 2893 thousand pounds.

as an average for the period (2015-2017).

The study recommends that farmers should adopt replacing high-yielding (newly developed) varieties with low productivity varieties to reduce the gap between production and consumption.