The effect of urea fertilizer and foliar application of seaweed Ulva fasciata Delile extract on some of alfalfa (Medicago sativa L.) growth factors.
Subject Areas : Environmental physiologymehdi rezvanimehr 1 , Mansour Seyyednejad 2 , azadeh niroomand 3 , Abdolali Gilani 4
1 - Department of Biology, Faculty of Science, ShahidChamran University of Ahvaz, Ahvaz, Iran
2 - Department of Biology, Shahid Chamran University, Ahvaz, Iran
3 - Department of Biology, Payame Noor University, Tehran, Iran
4 - Seed and Plant Improvement Research Department, Khuzestan Agricultural and Natural Resources Research Center, AREEO, Ahvaz, Iran
Keywords: Growth, Pigment, Seaweed extract, Medicago.Urea, Growth, Pigment, Seaweed extract, Medicago.,
Abstract :
Improper use of chemical fertilizers to increase the yield of various crops has caused numerous damages in various fields .The international community is moving towards the use of fertilizers and bio stimulants in the form of organic agriculture in order to reduce the risks and harms caused by the use of chemical fertilizers and at the same time maintain crop yields. In order to investigate the effect of urea chemical fertilizer and foliar application of Ulva fasciata Delile seaweed extract on growth factors of alfalfa (Medicago sativa L.), A Split plot study was conducted in the form of a randomized complete block design with 3 replications in Shavour Agricultural Research Station and Plant Physiology Laboratory of Shahid Chamran University of Ahvaz in 1399-1400. The treatments for this experiment included different concentrations of 4 levels urea fertilizer (0, 40, 70 and 100% of the usual amount of urea fertilizer) and different concentrations of 4 levels ulva seaweed extract (0, 5, 10 and 15%). Different concentrations of urea chemical fertilizer were used as soil application and different concentrations of ulva seaweed extract were used as foliar application. The treated plants were examined in the beginning of reproductive phase. The results were statistically analyzed by MSTAT-C software. Comparison of the mean interaction of urea fertilizer and seaweed extract showed that the application of 15% ulva seaweed extract along with 70% of the usual amount of urea chemical fertilizer leads to an increase in the desired factors compared to other treatments. In addition, malondialdehyde a level in plants treated with ulva seaweed extract were decreased. Based on this, it can be said that foliar application of 15% seaweed extract has an effect almost similar to half of the usual application of urea chemical fertilizer.
