Investigating the agronomic traits of winter canola in seeding and transplanting systems with different plant densities under delayed cultivation conditions

Document Type : Research Paper

Authors

1 Faculty member Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran

2 Department of Horticulture and Agronomy, Faculty of Agriculture, Kyrgyz-Turkish Manas University, Bishkek, Kyrgyzstan

3 Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran

4 Seed and Plant Improvement Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran

5 Ph. D. Student in Genetics and Plant Breeding, Faculty of Agriculture, Ilam university, Ilam, Iran

Abstract

Introduction
Oilseed rape (Brassica napus L.) is a traditional oil crop in Iran. Conventional oilseed rape production during the past decades has been performed through manual sowing, transplanting, and harvesting. In cold and temperate regions of the Iran in the Karaj region, due to delays in harvesting the previous crop such as corn, canola planting date is delay and it is not possible to planting oilseed rape seeds directly. Problems such as supplying primary soil water for crop establishment of canola fields, possibility of damage from cold and frost stress and late season drought due to delayed planting are the main problems of canola cultivation in Karaj region (Jabbari et al., 2022). Because of this, canola transplanting can solve the problems and be a good choice in these kinds of situations (Zeinalzadeh-Tabrizi et al., 2022). Although there have been many seeding rate studies done for canola, the optimum seeding rate and plant population for canola is not known. Optimum density for canola depends on both biological and economic factors. verall economic optimum plant density for canola was 30 to 40 plants m-2 (French et al., 2016). On the other hand, the transplanting method (bare-root or potted-root transplant), transplanting density and the number of seedlings per hole one seedling or two seedlings are very important to achieve the highest seed yield.

Materials and Methods
In order to agronomic evaluation of winter canola in seeding and transplanting systems with different plant densities under delayed cultivation conditions in the Karaj region, an experiment was conducted as a randomized complete block design with three replications in two cropping years, 2019-2020 and 2020-2021. Experimental treatments included direct sowing of seeds as a control at a rate of 6 kg/ha; transplanting with densities of 20, 30, and 40 plants per square meter, each density with both bare-root transplant and potted-root transplant; and also with one seedling or two seedlings in the planting hole. During the experiment, traits including Days to flowering time, flowering duration, growth period, plant height, stem diameter, branch number, silique length and diameter, silique per plant, seed number per silique, 1000-seed weight and seed yield were recorded. Combined analysis of variance carried out by SAS statistical analysis software and the least significant difference (LSD) test was used to compare treatment means with a probability threshold of 0.05.

Results and Discussion
The results of combined analysis showed that seed yield in the treatments of potted-root and bare-root seedling was between 686 and 1142 kg.ha-1 more than seeding cultivation. Yield reduction in seeding cultivation was due to the reduction of yield components, especially the number of silique per plant. Also, among all the investigated treatments, the highest seed yield (4395 kg.ha-1) was observed in the treatment of bare-root seedlings with a density of 40 plants with one seedling in the hole, which this issue was related to the relatively long flowering duration, noticeable superiority for silique per plant and high 1000 seeds weight. An independent comparison of bare-root and potted-root transplant treatments showed that in the total of two experimental years, bare-root treatments caused a significant decrease of 7.3% in days to beginning of flowering and 13.3% increase in the length of the flowering period, 7.2% in plant height, 42.7% in siliques per plant and 17.1% in the seed yield. Early maturity and higher of siliques number and number of seeds in siliques led to the superiority of seed yield in the bare-root treatment compared to the potted-root treatment. Mentioned issue was related to more competition between seedlings in the pot at the the potted-root treatment and the greater use of soil space for root development and less competition between seedlings in bare-root treatment.
Conclusions
Generally, results showed that bare-root transplant treatments were superior to potted-root transplant treatments for yield components and seed yield. Therefore, in the conditions of delayed cultivation of canola, it is recommended to bare-root transplanting with a density of 40 plants per square meter and one seedling in the planting hole, especially in the Karaj region.

Keywords

References

Amiri, M., Shirani Rad, A.H., Valadabadi, S.A., Daneshyan, J., and Zakerin, H.R. 2020. Evaluation of agronomic attributes of canola cultivars under different plant densities and application of humic acid. Journal of Crop Production and Processing, 9 (4): 83-95 (In Persian with English Summary).
Aram, S., Weisany, W., Daliri, M.S., and Mousavi Mirkalaie, S.A.A. 2021. Phenology, physiology, and fatty acid profile of canola (Brassica napus L.) under agronomic management practices (direct seeding and transplanting) and zinc foliar application. Journal of Soil Science and Plant Nutrition, 21: 1735-1744.
Behzadi, B., Balouchi, H.R., and Mazaheri, D. 2012. Effect of cultivar and plant density by change of row spacing on some of the quantitative and qualitative characteristics of canola (Brassica napus L.) In jiroft region. Applied field crops research (Pajouhesh & Sazandegi), 24(4 (93)), 104-111 (In Persian with English Summary).
Deng, J., Ran, J., Wang, Z., Fan, Z., Wang, G., Ji, M., Liu, J., Wang, Y., Liu, J., and Brown, J.H. 2012. Models and tests of optimal density and maximal yield for crop plants.  Proceedings of the National Academy of Sciences, 109 (39):15823-15828.
El-Sharayhi, R.E.A., El-Sayed, M.A.A., Taher, H.M.E. 2008. Effect of transplant age and some growth regulators on productivity of canola crop. Journal of Agricultural Science of Mansoura University, 33(8): 5497-5508.
Fanadzo, M., Chiduza, S., Mnkeni, P.N. 2009. Comparative response of direct seeded and transplanted maize to nitrogen fertilization at Zanyokwe irrigation scheme, Eastern Cape, South Africa. African Journal of Agricultural Research, 4(8): 689-694.
Habibi Asl, J., Azizi, A., Behbahani, L. 2021. Technical and Yield Evaluation of Mechanized Rapeseed Transplanting in Khuzestan. Agricultural Mechanization and Systems Research, 22(78): 73-88. 
Jabbari, H., Zareei Siahbidi, A., asadi, H., Shirani Rad, A.H., safavi fard, N., Valipour, M.B. 2022. Effect of seed planting and seedlings transplanting methods on agronomic traits of winter Oilseed rape under different times of transplanting in Karaj. Applied Field Crops Research, 35(1): 34-16 (In Persian with English Summary).
Lee, J.E., Kim, K.S., An, D.h., Cha, Y.L. 2021. Effects of transplanting and direct seeding on the growth and yield of Rapeseed (Brassica napus L.) during spring cultivation. Korean Journal of Crop Science, 66 (4): 419-427.
Maggioni, L., Von Bothmer, R., Poulsen, G., and Lipman, E. 2018. Domestication, diversity and use of Brassica oleracea L., based on ancient Greek and Latin texts. Genetic Resources and Crop Evolution, 65: 137-159.
Mokhtarpour, H., and Jabbari, H. 2023. Knowledge of rapeseed production in Iran (Chapter 16 - Transplanting basics). University Publication Center.
Momoh, E., and Zhou, W. 2001. Growth and yield responses to plant density and stage of transplanting in winter oilseed rape (Brassica napus L.). Journal of Agronomy and Crop Science, 186 (4): 253-259.
Mostafavi Rad, M., Nobahar, A., Gholami, M., Jahansaz, H., Akbarzadeh, E., and Adibi, S. 2020. Two Sowing and transplanting method effect on peanut (Arachis hypogea L.) growth as affected by different row distance in Rasht. Journal of Crop Production, 13(2): 117-130. 
Mottaghi, M., Mahrokh, A., and Seyedan, S.M. 2021. Effect of planting date and planting pattern on yield and quality of forage maize (Zea mays L.) in transplanting method. Iranian Journal of Crop Sciences, 23 (4): 341-356 (In Persian with English Summary).
Mousavi, S.J., Sam-Daliri, M., and Bagheri, H. 2011. Study of planting density on some agronomic traits of rapeseed three cultivar (Brassica napus L.). Australian Journal of Basic and Applied Sciences, 5(12): 2625-2627.
Rabiee, M., Majedian, M., Kavoosi, M. 2021. Effects of tillage systems, planting method and nitrogen amounts on the yield of Rapeseed (Brassica napus L.) and some properties of soil in paddy field Conditions. Journal of Agricultural Science and Sustainable Production, 31(1): 221-237. 
Rahnama, A., and Bakhshandeh, A.A. 2006. Effect of sowing dates and direct seeding and transplanting methods on agronomic characteristics and grain yield of canola under Ahvaz conditions. Iranian Society of Crops and Plant Breeding Sciences, 7 (4):324-336 (In Persian with English Summary).
Ren, Y., Zhu, J., Hussain, N., Ma, S., Ye, G., Zhang, D. and Hua, S. 2014. Seedling age and quality upon transplanting affect seed yield of canola (Brassica napus L.). Canadian Journal of Plant Science. 94: 1461-1469.
Safahani Langroodi, A., and Bagheri, M. 2017. Evaluation of sowing date and plant density on growth and seed yield of two canola (Brassica napus L.) cultivars in Gorgan's climatic condition. Journal of Plant production Sciences, 6(2): 59-70.
Safi, S.Z., Kamgar-Haghighi, A.A., Zand-Parsa, S., Emam, Y., and Honar, T. 2019. Evaluation of yield, actual crop evapotranspiration and water productivity of two canola cultivars as influenced by transplanting and seeding and deficit irrigation. International Journal of Plant Production, 13: 23-33.
Shahryari, A., Farhadian, H., and Mahmoudi, M. 2021. Investigating the factor structure of challenges and strategies of rapeseed production development (Studied Case: Alborz Province). Rural Development Strategies, 8(2): 133-150.
Shirani-Rad, A.H., Bitarafan, Z., Rahmani, F., Taherkhani, T., Moradi-Aghdam, A., and Nasresfahani, S. 2015. Effects of planting date on spring rapeseed (Brassica napus L.) cultivars under different irrigation regimes. Turkish Journal of Field Crops, 19 (2):153-157.
Wang, R., Wu, W., Cheng, X., and Peng, W. 2023. High plant density increases sunlight interception and yield of direct-seeded winter canola in China. Experimental Agriculture, 59, E2.
Zareei Siahbidi, A., Jabbari, H., Rezaei Zadeh, A., and Asgari, A. 2020. Effect of transplanting date and seedling growth stage on some agronomic characteristics and seed yield of rapeseed (Brassica napus L. ) In Kermanshah In Iran. Seed and Plant, 36(3), 301-315 (In Persian with English Summary).
Zeinalzadeh-Tabrizi, H., Jabbari, H., Parchami-Araghi, F. 2022. Effect of direct cultivation and transplantation on growth and seed yield of spring canola in different plant densities under delayed conditions in Moghan region. Journal of Crop Production, 15 (2): 137-160.
Zhou, X., Zhang, Y., Leng, S., Wang, Z., Gong, C., Zuo, Q., Yang, G. 2022. Uniconazole and adaptability of transplantations by enhancing the competition tolerance in a high sowing density of rapeseed blanket seedlings. Agronomy, 12: 2637.
Applied Field Crops Research
Volume 35, Issue 4 - Serial Number 137
papers
February 2024
Pages 48-25

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