Abstract

Research Article

Under Long Term Experiment, Response of Different Doses Phosphorus Application on Wheat and Soil Content of Carbon and Nitrogen

Mehmet Işik, Veysi Akşahin and Ibrahim Ortaş

Department of Soil Science and Plant Nutrition, University of Çukurova, Turkey, 01330

Corresponding author e-mail: isikm@cu.edu.tr

(Received: 02/07/2021; Revised: 16/09/2021; Accepted: 01/11/2021)

ABSTRACT

A Long-term field experiment was established at the University of Çukurova, Research and Application field of Agriculture Faculty on soil of Arıklı series at 1998. Four P doses like as; 0 (P0) as control, 50 (P50), 100 (P100) as well as 200 kg P₂O₅ ha^-1 (P200) was applied with tree replications. Wheat of Adana-99 species (‎Triticum aestivum L.) seeds were sown in November 2018 and harvested at May 2019. After harvesting, plant sample and soil samples under different depth and places (0-15 and 15-30 cm soil depth in Rhizosphere and Non-Rhizosphere) were taken. Root, shoot and seed part of wheat and soil C and N sample analyzed by Fisher 2000 model CN analyzer. The Organic Carbon (OC) and Total N (TN) pools were calculated by Ortas and Lal, 2012. Obtained data statistically analyzed and LSD test were realized by JMP 8 computer package program. There was statistically significant difference as N% and C% concentration under P200 doses application.  The heights C% and N% concentration was determined with P200 treatment. Also, there was statistically significant different as soil OC amount in Rhizosphere 0-15 soil depth in P 200 doses treatment in which the highest carbon content 46.1 Mg ha^-1 was determined. In addition, soil total nitrogen was determined and the highest N was measured in 0-15 cm soil depth. Soil C:N ratio changing from 6.1 to 10.3 and the highest C:N ratio was determined in Non-Rhizosphere 15-30 cm soil depth. Under long-term field conditions, depending on increasing doses P fertilizer wheat plant growth and increased plant N and C concentration. Also, soil OC and TN amount were increased. It seems that the addition of P dose application increased biomass and consequently plant and soil C content.  This is supporting our hypothesis.

Keywords: Long-term experiment, Phosphorus, Wheat, Soil Organic Carbon, and Nitrogen.