Effect of defoliation on yield and yield components of chickpea (Cicer arietinum L.) under different amount of nitrogen fertilizer and irrigation regimes

Document Type : مقالات پژوهشی

Authors

• zohre amini
• mehdi parsa
• mehdi nasiri mahalati
• mohammad banayan aval

Ferdowsi University of Mashhad

10.22067/ijpr.v8i1.30759

Abstract

Introduction
Chickpea (Cicer arietinum L.), an annual with indeterminate growth habit, is one of the most important food legumes. Loss of foliage due to leaf diseases or environmental hazards are prevalent for many crops. Such loss of foliage affects the yield and also the carbohydrate and protein status of leaves and seeds. The source-sink relationship change during growth stages. Few factors including nitrogen fertilizer and water influence this relationship. This experiment was conducted in order to study the effects of nitrogen fertilizer, supplementary irrigation and defoliation on yield and yield components of chickpea.

Materials & Methods
The experiment was conducted as split-split plot based on randomized complete block design with three replications in research farm of Faculty of Agriculture, Ferdowsi University of Mashhad, Iran in 2012. Main plot was nitrogen fertilizer including 30, 75 and 150 kg N/ha and sub-plot was irrigation regimes including full irrigation, supplemental irrigation at flowering and supplemental irrigation at flowering and seed filling stages. Defoliation including 0, 25%, 50%, 75% and 100% was considered as sub-sub plot. Leaf and stem dry weight, seed yield, biological yield, pod number per plant, grain number per plant, 100 grain weight and harvest index were all recorded.

Results & Discussion
The results indicated that all traits excluding harvest index were higher in 150 kg N.ha-1 treatment compared to other levels of nitrogen. Nitrogen rate of 150 kg.ha-1 produced the highest grain yield (135.7 g.m-2). The highest harvest index (40.7%) was obtained at 30 kg.ha-1 N treatment. Full irrigation and supplemental irrigation at flowering and poding stages with average grain yield of 146 g.m-2 were higher than supplemental irrigation at flowering (83 g.m-2). Supplemental irrigation at flowering and poding stages showed the highest harvest index (41.2 %). The highest biological yield was obtained from 150 kg N.ha-1 (413 g.m-2) and full irrigation (415 g.m-2). Nitrogen rate 75 kg.ha-1 at 0% defoliation (control), resulted in the highest seed yield (177 g.m-2). The lowest seed yield (58 g.m-2) was obtained from 75 kg.ha-1 nitrogen treatment and complete defoliation. By increasing of N fertilizer application, the negative effects of defoliation in some traits such as pod number and seed and leaf weight decreased. In 30 and 75 kg.ha-1 nitrogen treatment, 100% defoliation decreased pod number to 50%, but this was 20% in 150 kg.ha-1 nitrogen treatment. Full irrigation with 0% defoliation produced the highest (196 g.m-2) and supplemental irrigation at flowering stage with complete defoliation the lowest (56 g.m-2) grain yield. Defoliation decreased the most of mentioned traits significantly. Complete defoliation decreased grain and biological yield to 46% and 56%, respectively compared to the control. The lowest harvest index (29%) was obtained in complete defoliation. All of traits including pod number, seed number, harvest index and biological yield had positive and significant correlation with seed yield. Biological yield (83%) had highest correlation with yield.

Conclusion
Generally, defoliation decreased grain yield. However, application of nitrogen fertilizer at low levels could decrease the negative effects of defoliation. High N application improved the ability of plant to compensate the leaves that removed grain yield in treatments of full irrigation and supplementary irrigation at flowering and depoding stages was equivalent, therefore under water deficit condition, supplementary irrigation at flowering and podding stages recommend.

Keywords

• Defoliation
• Drought stress
• Nitrogen fertilizer
• Supplemental irrigation

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References

1. Bagheri, A., Nezami, A., Ganjali, A., and Parsa, M. 1997. Agronomy and Breeding of Chickpea. Jahad Daneshgahi Pub. Mashhad.

2. Bilsborrow, P.E., Evans, E.J., and Zhao, F.J. 1993. The influence of spring nitrogen on yield components. Agriculture Science 120: 219-224.

3. Brevendan, R.E., Egli, D.B., and Leggett, J.E. 1978. Influence of N nutrition on flower and pod abortion and yield of soybeans. Agronomy Journal 70: 81-84.

4. Gazzoni, D. L., and Moscardi, F. 1997. Effect of defoliation levels on recovery of leaf area, on yield and agronomic traits of soybeans. Embrapa-Centro Nacional de Pesquisa de Soja (CNPSo).

5. Janmohammadi, M., Ahmadi, A., and Poustini, K. 2010. Effect of leaf area reduction and nitrogen application on stomatal characteristics of flag leaf and grain yield of wheat under deficit irrigation. Electronic Journal Crops Production 3(4): 177-194. (In Persian with English Summary).

6. Mousavi, S.K., Pezeshkpoor, P., Khorgami, A., and Noori, M. N. 2009. Effects of supplemental irrigation and crop density on yield, and yield components of Kabuli chickpea cultivars. Iranian Journal of Agronomic Research. 7(2): 657-672. (In Persian with English Summary).

7. Pandey, R.K. 1984. Influence of source and sink removal on seed yield of chickpea (Cicer arietinum). Field Crops Research 8: 159-168.

8. Rezvani Moghaddam, P., and Sadeghi Samarjan, R. 2008. Effect of sowing dates and different irrigation regimes on morphological characteristics and grain yield of chickpea (Cicer arietinum L.) (cultivar 3279 ILC). Iranian Journal of Agronomic Research 6(2): 315-326. (In Persian with English Summary).

9. Sajadi Nik, R., and Yadavi, A.R. 2013. Effect of nitrogen fertilizer, vermicompost and nitroxin on growth indexes, phonological stages and grain yield of Sesame. Electronic Journal Crops Production 6(2): 73-99. (In Persian with English Summary).

10. Singh, S.K.S., and Ganapathy, P.S. 1998. Realisation of yield potential in chickpea (Cicer arietinum L.). PP: 318- 319. In: Proceeding of the International Worhshop of Chickpea Improvement. 15-20 Feb 1998, New Dehli, India.

11. Siosemardeh, A., Ranjbar B.H., Sohrabi, Y., and Bahram Nejad, B. 2011. Effect of drought stress and sink-source limitation on gaz exchange and yield of sunflower (Helianthus annuus L.). Iranian Journal of Crops Sciences 2(3): 585-596. (In Persian).

12. Yang, Z., and Midmore, D.J. 2004. Experimental assessment of impact of defoliation on growth and production of water-stressed maize and cotton plants. Experimental Agriculture 40: 189-199.

13. Yazdani Biouki, R., Rezvani Moghadam, P., Kouchaki, A., Amiri, M.B., Fallahi, J., and Deyhimfard, R. 2010. Effects of different nitrogen nutrition of wheat (Triticum aestivum L.) Sayonz cultivar on germination indices and seedling growth under levels of drought stress and biological fertilizer. Journal of Agroecology 2)2(: 266-276. (In Persian).