Evaluation of Quantitative Traits of Sunflower Using Organic and Biofertilizers under Drought Stress Conditions

شکاری, فریبرز and جوانمرد, عبدالله and عباسی, امین and ایزان, طه and صباغ نیا, ناصر Evaluation of Quantitative Traits of Sunflower Using Organic and Biofertilizers under Drought Stress Conditions. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

In order to investigate the effect of biological, organic and chemical fertilizers on the quantitative traits of experimental sunflower in 1395 and 1396, agricultural research station in Piranshahr city was divided into three replications as a randomized complete block design. The main plots included three levels of irrigation: 85% field capacity (I1), 70% field capacity (I2), 55% field capacity (I3) and sub plots including fertilizer treatment in 8 levels: Fertilizer (F1), 10 ton Vermicompost (F2), 15 ton / ha vermicompost (F3), biofertilizer + Azotobacter biofertilizer (F4), 10 ton / ha vermicompost + biofertilizer + azotobacter biofertilizer (F5), 15 ton / ha vermicompost And Azotobacter (F6), 10 t ha-1 vermicompost + biofertilizer + biofertilizer + 50% fertilizer (F7) and 15 t ha-1 vermicompost + biofertilizer + azotobacter + 50% chemical fertilizer (F8) Were. Severe stress (55% of field capacity) significantly reduced plant height, onion diameter, head diameter, biological yield, number of seeds per head. The highest biological yield (1319 gm-2) was obtained under normal irrigation (85% of field capacity) and 15 ton ha-1 vermicompost + biofertilizer + azotobacter + 50% fertilizer. The lowest biological yield of sunflower (890 gm-2) was observed using 100% fertilizer in 55% irrigation capacity. Therefore, it seems that the combination of organic, biological and chemical fertilizers can be used to increase crop yield.

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