Reducing Nitrogen Fertilizers with Chlorophyll Meter for Determining Health Production

Subject Areas : Environmental pollutions (water, soil and air)

jafar shahabi ¹ (Assistant Professo of Qazvin Agricultural and Natural Resources Research and Education Center, Agricultural and Natural Resources Research Center, (AREEO), Qazvin, Iran. *(Corresponding Author))
Mohammadmehdi Tehrani ² (Assistant Professor of Research, Soil and Water Research Institute, Agricultural and Natural Resources Research Center, (AREEO), Karaj. Iran.)

Received: 2017-03-12 Accepted : 2017-06-10 Published : 2020-09-22

Keywords: wheat, Environment, Pollution, Nitrate, chlorophyll meter,

Abstract :

Background and Objective: Excessive use of nitrogen pollutes water, soil and plant resources. One of the appropriate solutions in determining the correct and timely amount of nitrogen fertilizer is the use of chlorophyll meter. The purpose of this study is to reduce the use of nitrogen fertilizers and prevent nitrate leaching and its entry into groundwater sources. Method: Using chlorophyll assay in leaves, an experiment using 6 treatments of nitrogen fertilizer including: 50, 150, 100, 200, 250 and 300 kg per hectare of urea source in a randomized complete block design with three replications, two locations and It ran for a year. At the stem stage, the chlorophyll in the leaves of the wheat flag was read using a chlorophyll meter. Considering the number 45 as a reference, the amounts of nitrogen road fertilizer at the stem stage were calculated and, if necessary, provided to experimental plots. Findings: With the recommendation of nitrogen fertilizer road using chlorophyll meter, nitrate concentration in soil and plants was reduced. In this study, the nitrogen fertilizer road recommendation was saved so that in the application treatments of 250 and 300 kg / ha nitrogen fertilizer was 25 and 21%, respectively. Discussion and Conclusion: By using chlorophyll meter in recommending nitrogen fertilizer road in wheat, significant savings can be achieved in consumption. This will produce a healthy crop with less nitrate and prevent nitrate from entering groundwater.

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