MANAGEMENT OF REMINI APPLE PRODUCTION IN DRY AREAS (UNDER UNFAVORABLE CONDITIONS OF WATER SHORTAGE AND SOIL TEXTURE)

Hamid Kheyrodin*

ABSTRACT

In order to investigate the effect of water stress and soil texture on the yield andgrowth indicators of potato cultivar Aiola, the flooding method with differentvolumes of water has been used in Semnan University.The effects of drought stress on changes in dry matter of plant organs, total plant drymatter TDM, relative growth rate RGR, crop growth rate CGR, leaf area index LAI, leafarea durability LAD and net absorption rate NAR were very high.Dehydration stress has caused a decrease in CGR, and this is the reason why tubersand potato performance are reduced. In general, the effects of stress on growthindicators are different depending on the intensity of stress and cultivars, and theresearch results indicate a decrease in growth indicators. It is due to the lack ofwater. The maximum production of potatoes occurs when the soil moisture is at itsoptimum level. The optimum level of soil moisture is 60 to 70% of the total wateravailable to the plant, depending on the growth stage. Our results have shown thatirrigation at the rate of 200 mm reduces the dry matter of the aerial part of the plant,the dry matter of the root, the dry matter of the tuber and the yield of the tuber. Ofcourse, the application of dry stress has reduced the dry weight of potato roots andthe amount of this reduction is correlated with the intensity of the stress.

Keywords:

Management, potato cultivation, water stress, soil texture.

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