جستجوی مقالات مرتبط با کلیدواژه « manganese sulfate » در نشریات گروه « آب و خاک »

To study manganese (Mn) status and its effect on fruit yield and quality of Thomson navel oranges, two separate experiments were carried out in East of Mazandaran Province, Iran. The first experiment was conducted in citrus orchards of the region, and the second was conducted in an orchard of Thomson navel on sour orange rootstock, using a randomized complete block design with seven treatments and four replications. Treatments included: 1) First control (without manganese); 2) Second control (without manganese and with urea spray), 3) 300 g manganese sulfate per tree as soil application, before leaf development, 4) 300 g manganese sulfate per tree as fertigation, in the first stage of fruit growth, 5) 300 g manganese sulfate per tree as fertigation, in the first and second stages of fruit growth, 6) Manganese sulfate spraying in the first stage of fruit growth, and 7) Manganese sulfate spraying in the first and second stages of growth. The results showed that the orchards of Sari and Neka had the most deficiency symptoms. The results of the second experiment showed that soil application before leaf development had no effect on yield, fruit quality, Mn concentration in leaf, fruit and root, but its application as fertigation and spraying increased fruit yield, diameter, and weight, leaf and fruit manganese concentration. The highest leaf Mn concentration was obtained from the first and second stage of fruit growth treatment. Fertigation treatment significantly increased the root Mn concentration compared to the control. In general, according to the results of this experiment, for orchards with a history of mild manganese deficiency or probable manganese deficiency, application of manganese sulfate as fertigation or spray after the fall of petals in the first stage of fruit growth is recommended. However, for orchards that have severe symptoms of manganese chlorosis, two foliar applications or fertigations with manganese sulfate, after petal fall and second stage of the fruit growth, before the growth of the fall flash, is recommended.

Water stress is one of the factors whish reduces the amount of nutrient uptake, greatly. In order to study the effect of foliar application of iron and manganese on yield and yield components of the mung bean (Vigna radiata L. Parto) under water deficit stress, an experiment was conducted as a complete randomized block design with split plot arrangement in three replications. Main plots were three levels of irrigation stoppings (With out stopping irrigation, with one irrigation turn stopping at each of the primary growth and the production stages, respectively) and submain plots were combination of foliar iron and manganese applications. The levels of foliar application were no foliar application (as control), water foliar application,iron sulfate 1%, iron sulfate 1.5%, manganese sulfate 0.5%, manganese sulfate 1%,iron sulfate 1%+manganese sulfate 0.5% and iron sulfate 1.5%+manganese sulfate 1%. The results showed that the treatment of water deficit stress at the vegetative and production stages had a significant effect on yield and yield components of the varieties of the mung bean. The hightest effect of water stress was related to the production stage. The combined foliar application of the iron and manganese significantly increased the grain yield, number of the pods per plant, grain weight, plant height, leaf area index, and grain iron and manganese content. However, drought stress reduced the studied traits, but foliar application of iron and manganese resulted in plant resistance that caused delay in appearance of the water stress in plant and thus improved the production performance.