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Evaluation of chickpea nitrogen and phosphorus requirement in wheat rotation under conservation tillage systems
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Mokhtar Dashadi *   |
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Abstract: (47 Views) |
In order to provide balanced nitrogen and phosphorus nutrition in rainfed chickpea cultivation in rotation with wheat under conservation tillage systems, a split-plot project was implemented in a randomized complete block design with three replications from the fall of 2020 for 4 years at Sararood Branch, Dryland Agricultural Research Institute. Experimental treatments included Tillage methods in 2 levels including minimum tillage (chisel) and no-till (direct sowing) As main plots and nitrogen fertilizer application at four levels N0, N10, N20, N30 and phosphorus fertilizer at four levels P0, P10, P20, P30 in the sub-plots. In this project, chickpea was planted at a density of 40 seeds per square meter from November 15 to December 15 each year using a direct sowing seeder (ASKE 2200 Sazeh Gostar Bukan) with a row spacing of 50 cm and a length of 8 m. In this study, another phase was considered for wheat with tillage treatments and the place of chickpea and wheat cultivation was changed every year. At the end of the growth period, plant height, number of pods per plant, 100-grain weight, grain yield, and biological yield were determined for each treatment. Analysis of variance and graphing were analyzed using Mstat c and Excel statistical software, respectively. The project results showed that the highest grain yield and biological yield were obtained from the no-tillage treatment with a grain yield of 694.4 and 1752 kg/ha, respectively, which was 12.5 and 6 percent higher than the low-tillage treatment with a grain yield of 607.47 and a biological yield of 1645.8 kg/ha, respectively. Under No-tillage conditions, the highest grain yield (820.7 kg/ha) was obtained from the use of 20 kg of nitrogen, and among the phosphorus fertilizer treatments, the highest grain yield (721.8 kg/ha) was obtained from the use of 10 kg of pure phosphorus. Also, under Minimum-tillage conditions, the highest grain yield (685 kg/ha) was obtained from the use of 10 kg of nitrogen, and among the phosphorus fertilizer treatments, the highest grain yield (702 kg/ha) was obtained from the use of 10 kg of pure phosphorus. Therefore, the use of conservation agriculture with greater emphasis on no-tillage along with the optimal use of nitrogen and phosphorus fertilizers, while relatively increasing yield, will reduce the relative complications of excessive fertilizer use and reduce the production costs incurred in the Minimum -tillage system, and ultimately achieve production sustainability and increase the net income of farmers.
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| Keywords: Rotation, Conservation tillage, Phosphorus, Chickpea rain fed, Nitrogen |
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Full-Text [PDF 605 kb]
(19 Downloads)
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Type of Study: Research |
Subject:
Crop Improvment
Received: 2025/06/28 | Accepted: 2025/09/1 | Published: 2025/09/1
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