Evaluation of split root system followed by semi-hydroponic conditions and fungi in peach trees to improve water uptake efficiency in low yield lands

The most important factor limiting the production of horticultural crops, especially in countries like Iran, is water deficiency. Application of appropriate methods to increase water efficiency in fruit trees is the most important factor for optimal fruit production. This study was conducted as a factorial randomized complete block design with three replications on Redtop peach trees grafted on GF677. Treatments included placing the bag near to the tree to direct the root to the bag and creating semi-hydroponic conditions that were performed at three levels without bag, one bag, and two bags. Also, to estimate the effects of the split root system in increasing water efficiency, different levels of irrigation were performed at three levels of 50, 75 and 100% of field capacity. Effective fungi inoculation at three levels including no fungus, Mycorrhiza glumus and Trichoderma harizanium were applied to evaluate the efficiency of water. Physiological and qualitative properties of saplings were evaluated 24 months after planting. The results showed that leaf growth parameters were significantly increased by bag insertion, fungal inoculation and irrigation. One bag placement, 75% irrigation capacity and inoculation of Trichoderma increased leaf fresh and dry weights by 62 and 52%, respectively. Fruit diameter and length were increased by 6 and 8%, respectively, in placement of two bags. Bagging was increased sugar content and titrable acidity compared to control. Mycorrhiza fungi enhanced titratable acidity and Trichoderma enhanced fruit firmness up to 9 and 32%, respectively.