B Mostafaei, J Saleh,
Volume 11, Issue 3 (7-2009)
Abstract
There are more than 37,000 hectares of land cultivated with date palm in Hormozgan Province producing around 145,000 tons of date annually. Therefore, increasing date yield and quality can ender positive effects, especially on farmers, income in the region. One of the most important agricultural practices is mineral nutrition nd soil fertility management that can improve yield and fruit quality of date palm.
This research was conducted for a duration of three years to study the effect of essential nutrients application on Date Bunch Wilt and ry disordr (DBWD) which has caused large production reductions in recent years. Two palm groves of “Mordasang” cultivar were chosen as experimental sites. One was afflicted with DBWD and he other one healthy.
Fertilizer treatments were applied on the basis of soil and leaf nalysis as follows:
1- Control (with no use of fertilizers)
2- Addition of balanced amounts of macro-nutrients and
3-Addition of balanced amounts of macro as well as micro-utrients. Theexperiment was arranged with a complete randomized block design of five replications. Maintenance operations consisted of pollination, weeding, disease and pest control. Such plant esponses as fruit yield, bunch number and percentage of bunches fflicted by DBWD were determined and compared among treatments. There was no significant difference observed between bunch numbers per tree in the fertilizer treatments. Application of ssential nutrient elements (treatments 2 and 3) resulted in a onsiderable increase in date yield and a decrease in dried bunches percentage.
Gh. Shabani, M. R. Ardakani, M. R. Chaichi, J. K. Friedel, K. Khavazi,
Volume 17, Issue 2 (3-2015)
Abstract
To study the effect of different fertilizing systems on macro and micro nutrients uptake by annual medic (Medicago scutellata cv. Robinson) an experiment was conducted under dry farming and irrigated conditions at two research stations (Sararood Dryland Agricultural Research Institute and Soil Fertility Research Station in Mahidasht) during 2009 growing season. The experimental treatments consisted of the two experimental sites with different climatic conditions and cultural systems (dry farming and irrigated systems), while the fertilizer treatments consisted of the control (no fertilizer), chemical fertilizer, biological fertilizer, and different combinations of chemical and biological fertilizing systems. The results showed that, in both irrigated and dry farming conditions, all fertilizing treatments increased macro- and micro-nutrients uptake over the control. The highest concentration of nutrient elements such as Nitrogen (3.82%), Potassium, (4.16 mg kg-1), Iron (495 mg kg-1) and Cu (60.8 mg kg-1) were observed in integrated fertilizing treatments i.e. Nitrogen-fixing bacteria+Triple superphosphate. Application of integrated fertilizing treatments not only decreased the chemical fertilizer application (consequently, reducing the environmental pollutions), but it also enhanced forage quality in terms of higher macro- and micro-nutrients concentrations. According to the results of this study, it could be concluded that integrated fertilizing systems may be more efficient in dry farming agro-ecosystems than in irrigated systems.
