The effect of mycorrhizal symbiosis and application of organic fertilizers on photosynthetic pigments, yield and nutrient content Nasturtium officinalis

Endemic vegetables are a wide range of plants that are known and used in different regions with different names and are native to the region. But a group of them, which are found in most areas, are more common in food, and some of them are used as medical treatment, sedatives, and in health and cosmetics. These plants grow away from chemical fertilizers and in the sun and have a different flavor and are more nutritious and natural than vegetables grown artificially. The increasing use of chemical fertilizers has caused irreparable environmental and health damage. These disadvantages of chemical fertilizers and the high cost of their production have caused the production of biofertilizers to be given serious attention. This study aimed to investigate the effect of organic fertilizers (vermicompost, vermiwash) and mycorrhizal symbiosis on yield and yield components of Nasturtium officinalis.

This factorial experiment in the form of a randomized complete block design with 8 treatments and 4 replications in Sari with a geographical position of 53 degrees and 63 degrees East, 36 degrees latitude, and 82 minutes north and 43.3 meters above sea level in 2014. The test factors included mycorrhiza Glomus moseae in two levels (0 and 200 spores in a pot), vermicompost in two levels (0 and 200 g in a pot), and foliar application vermiwash in two levels (0 and 1.5 liters in the specified pots). Characteristics such as leaf area index, chlorophyll a, b, and total chlorophyll, the concentration of nitrogen, phosphorus, potassium, fresh weight of leaves and stems, number and diameter of flowers and weight of 1000 seeds were evaluated.

The results showed that the use of organic fertilizers (vermicompost, foliar application of vermicompost) and mycorrhizal coexistence increased leaf area index, 1000-seed weight, and percentage of phosphorus, nitrogen, and chlorophyll a, b compared to the control. Mycorrhizal symbiosis treatment with foliar application of vermicompost and application of vermicompost caused 53% increase in 1000-seed weight, 245% nitrogen, 72% phosphorus and 65% chlorophyll b compared to the control. According to the obtained results, combining G. mosseae treatment and foliar application with vermicompost and application of vermicompost had better results than other treatments.

generally, Organic and biological fertilizers have a positive impact on the yield and yield components of Nasturtium officinalis The application of vermicompost, compost tea, and mycorrhizal symbiosis through the availability of nutrients has increased the Nasturtium officinalis qualitative and quantitative qualities.