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Information Journal Paper

Title

EFFECT OF VARIOUS BIOLOGICAL, CHEMICAL, AND INTEGRATED FERTILIZATION SYSTEMS ON GROWTH, YIELD, AND YIELD COMPONENTS OF SUNFLOWER (HELIANTHUS ANNUUS L.)

Pages

 Start Page 19 | End Page 30

Abstract

 In order to investigate the effects of biological, chemical, and integrated fertilizers on growth, yield, and yield components of sunflowers, an experiment was conducted in a randomized complete block design with three replications at the Agricultural Research Station of Zabol University in the growing season 2014-15. The experiment consisted of 13 treatments including NPK, BIO PHOSPHORUS, biophosphorus+25% NPK, biophosphorus+50% NPK, biophosphorus+100% NPK, nitroxin, nitroxin+25% NPK, nitroxin+50% NPK, nitroxin+100% NPK, BIO PHOSPHORUS + nitroxin, BIO PHOSPHORUS + nitroxin +25% NPK, biophosphorus+nitroxin+50%NPK and BIO PHOSPHORUS + nitroxin + 100%NPK. The results showed that the effect of different treatments of chemical, biological, and integrated fertilizers were significant on most of the studied traits except the number of leaves, flowering date, and the number of florets per head. The highest mean in most of the studied traits belonged to the nitroxin+biophosphorus+100% NPK treatment which was not significantly different from the nitroxin+biophosphorus+50% NPK integrated treatment. The results of this study showed that combined application of nitroxin+biophosphorus+50% NPK in comparison with the integrated treatment of nitroxin+biophosphorus+100% NPK in addition to reducing 50% of chemical fertilizers application can also produce optimal yield. According to the obtained results, the application of 50% of the recommended amount of chemical fertilizers in combination with the NITROX IN and BIO PHOSPHORUS bio fertilizers can be recommended for obtaining the maximum quality and quantity yield of sunflower.

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