Effect of Humic Acid on Physiological and Biochemical Indices and Yield of Tomato under Deficit Irrigation

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Aslani Shilan; BARZEGAR TAHER; Nikbakht Jaefar

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Journal: JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE) Year:2019 | Volume:21 | Issue:2 Page(s): 221-232

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Information Journal Paper

Title

Effect of Humic Acid on Physiological and Biochemical Indices and Yield of Tomato under Deficit Irrigation

Author(s)

Aslani Shilan | BARZEGAR TAHER | Nikbakht Jaefar | Issue Writer Certificate

Keywords

Foliar sprayQ2

membrane stability indexQ2

prolineQ1

proxidaseQ2

stomatal conductanceQ2

Abstract

In order to study the effect of water deficit stress and Foliar spray of humic acid (HA) on physiological and yield traits of tomato, the current paper conducts an experiment in a split plot based on randomized complete block design with three replications at the research filed of University of Zanjan, during 2016. The treatments in this experiment include arrangement of three irrigation levels (at 100%, 80%, and 60% ETc) and 4 levels of HA (0, 100, 200, and 300 mg. l-1). Results show that deficit irrigation has significantly decreased stomatal conductance, membrane stability index, leaf relative water and chlorophyll a and b content, and plant yield, increasing the proline content and proxidase activity. HA treatment enhances proxidase activity, leaf relative water content, proline, chlorophyll, membrane stability index, and plant yield under normal and deficit irrigation, decreasing stomatal conductance. The maximum peroxidase activity (1. 207 uints. g-1FW. Min-1) and proline content (11. 5 mg. gFW-1) belongs to the treatment with 200 mg L-1 HA and 60% of ETc irrigation. Also, the maximum leaf relative water content (78. 6%) and membrane stability index (70. 01%) has been observed in HA 300 and 200 mg L-1, respectively under 100% ETc irrigation. The maximum plant yield has been obtained with application of HA 200 mg L-1 under 100% ETc irrigation. According to the results, application of HA 200 mg L-1 could help improving the plant's physiological traits, simultaneously increasing its fruit yield.

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APA: Copy

Aslani, Shilan, BARZEGAR, TAHER, & Nikbakht, Jaefar. (2019). Effect of Humic Acid on Physiological and Biochemical Indices and Yield of Tomato under Deficit Irrigation. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), 21(2 ), 221-232. SID. https://sid.ir/paper/209480/en

Vancouver: Copy

Aslani Shilan, BARZEGAR TAHER, Nikbakht Jaefar. Effect of Humic Acid on Physiological and Biochemical Indices and Yield of Tomato under Deficit Irrigation. JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE)[Internet]. 2019;21(2 ):221-232. Available from: https://sid.ir/paper/209480/en

IEEE: Copy

Shilan Aslani, TAHER BARZEGAR, and Jaefar Nikbakht, “Effect of Humic Acid on Physiological and Biochemical Indices and Yield of Tomato under Deficit Irrigation,” JOURNAL OF CROPS IMPROVEMENT (JOURNAL OF AGRICULTURE), vol. 21, no. 2 , pp. 221–232, 2019, [Online]. Available: https://sid.ir/paper/209480/en

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