Growth and yield responses of two forage sorghum cultivars to different nitrogen fertilizer rates

Document Type: Research Paper

Authors

Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz University, Shiraz, I.R. Iran.

Abstract

In order to evaluate the impact of different amounts of nitrogen fertilizer on growth and yield of two forage sorghum cultivars, a 2-year field experiment was carried out at the College of Agriculture, Shiraz University, Shiraz, Iran during 2010 and 2011 growing seasons. Two factorial experiments were carried out in randomized block design with three replicates, in which the treatments included nitrogen fertilizer at three levels: 69 (N1), 138 (N2) and 205 (N3) kg N ha-1 and two sorghum cultivars: Pegah and KFS2. The results showed that nitrogen fertilizer enhanced plant height, leaf area index, fresh weight, total dry weight and biological yield significantly so that these traits were higher in N3 as 5.71, 22.8, 8.13, 22.5, and 8.7% than N1, respectively. Furthermore, increasing nitrogen rate had additive effect on crop growth rate, relative growth rate, biomass duration and leaf area duration. Comparing the cultivars, it was found that, plant height, fresh weight, total dry weight and biological yield were higher in Pegah than KFS2 cultivar. Results also showed that most of the studied traits were superior for Pegah under N3 treatment; so, Pegah cultivar and application of 205 kg N ha-1 might be offered for similar agro-climatic conditions.

Keywords

Main Subjects


Article Title [Persian]

واکنش رشد و عملکرد دو رقم سورگوم علوفه‌ای به مقادیر مختلف کود نیتروژن

Authors [Persian]

  • نغمه مقیمی
  • کبری مقصودی
دانشگاه شیراز
Abstract [Persian]

به منظور ارزیابی تأثیر مقادیر مختلف کود نیتروژن بر رشد و عملکرد دو رقم سورگوم علوفه‌ای ازمایشی مزرعه‌ای در دانشکده کشاورزی دانشگاه شیراز در دو سال زراعی 90-1389 انجام شد. دو ازمایش فاکتوریل در قالب طرح بلوک‌های کامل تصادفی با سه تکرار انجام شد که در آن تیمارها شامل سه سطح کود نیتروژن (69، 138 و 205 کیلوگرم نیتروژن در هکتار) و دو رقم سورگوم (پگاه و KFS2) بودند. نتایج نشان داد که کود نیتروژن به طور معنی‌داری ارتفاع بوته، شاخص سطح برگ، وزن تر، وزن خشک کل و عملکرد بیولوژیک را افزایش داد، به نحوی‌که این صفات در تیمار 205 کیلوگرم نیتروژن در هکتار به ترتیب 71/5، 8/22، 13/8، 5/22 و 7/8 درصد نسبت به تیمار 69 کیلوگرم نیتروژن در هکتار افزایش داشت. علاوه بر این، افزایش میزان نیتروژن اثر افزایشی بر سرعت رشد گیاه، سرعت رشد نسبی، دوام زی‌توده و دوام سطح برگ داشت. در مقایسه ارقام مشاهده شد که ارتفاع بوته، وزن تر، وزن خشک کل و عملکرد بیولوژیک در رقم پگاه بیشتر از KFS2بود. نتایج نشان داد که رقم پگاه در بیشتر صفات مطالعه شده و در تیمار 205 کیلوگرم نیتروژن در هکتار برتری داشت. بنابراین، رقم پگاه و کاربرد تیمار 205 کیلوگرم نیتروژن در هکتار می‌تواند برای شرایط زراعی و آب و هوایی مشابه پیشنهاد گردد.

Keywords [Persian]

  • دوام زی توده
  • سرعت رشد محصول
  • دوام سطح برگ
  • سرعت رشد نسبی
Amanullah, H., Marwat, K.B., Shan, P., Maula, N., &Arifullah, S. (2009). Nitrogen levels and its time of application influence leaf area, height and biomass of maize planted at low and high density. Pakistan Journal of
Botany
, 41, 761-768.

Bebawi, F.F. (1981). Response of sorghum cultivars and striga population to nitrogen fertilization. Plant Soil, 59, 261-267.

Bethlenfalvay, G.J., & Phillips, D.A. (1977).Ontogenetic interactions between photosynthesis and symbiotic N 2 fixation in legumes.Plant Physiology, 60, 419-421.

Borrell, A., & Hammer, G.L. (2000).Nitrogen dynamics and the physiological basis of stay-green in sorghum.Crop Science, 40, 1295–1307.

Borrell, A., Van Osterom, E., Hammer, G., Jordanand, D., & Douglas, A.(2003).The physiology of “stay-green” in sorghum. Proceedings of the 11th Australian Agronomy Conference, 2-6 Feb 2003.

Cox, W.J.,&Cherney, D.J.R. (2001). Row spacing, plant density, and nitrogen effects on corn silage. Agronomy Journal, 93, 597–602.

Ding, L., Wang, K.J., Iang, G.M., Biswas, D.K., Xu, H., Li, L.F., & Li, Y.H. (2005). Effects of nitrogen deficiency on photosynthetic traits of maize hybrids released in different years. Annals of Botany, 96, 925-930.

Gardner, J.C., Maranville, J.W., &Paparozzi, E.T. (1994).Nitrogen use efficiency among diverse sorghum cultivars.Crop Science, 34, 728-733.

Grewal, H.S., & Williams, R. (2003). Liming and cultivars affect root growth, nodulation, leaf to stem ratio, herbage yield, and elemental composition of alfalfa on an acid soil. Journal of Plant Nutrition, 26, 1683-1696.

Hammad, H.M., Ahmad, A., Wajid, A.,&Akhter, J. (2011).Maize response to time and rate of nitrogen application.Pakistan Journal of Botany, 43, 1935-1942.

Jensen, E.S. (1987).Seasonal patterns of growth and nitrogen fixation in field-grown pea.Plant Soil, 101, 29-37.

Kamoshita, A., Fukai, S., Muchow, R.C., & Cooper, M. (1998). Genotypic variation for grain yield and grain nitrogen concentration among sorghum hybrids under different levels of nitrogen fertilizer and water supply. Australian Journal of Agricultural Research, 49, 737–747.

Karic, L., Vukasinovic, S., &Znidarcic, D. (2005).Response of leek (Allium porrumL.) to different levels of nitrogen dose under agro-climate conditions of Bosnia and Herzegovina.ActaAgriculturaeSlovenica, 85, 219-226.

Levine, J.M., Brewer, J.S., &Bertness, M.D. (1998).Nutrients, competition and plant zonation in a New England salt marsh. Journal of Ecology, 86, 285-292.

Magdoff, F.R. (1991). Managing nitrogen for sustainable corn systems: problems and possibilities. American Journal of Alternative Agriculture, 6, 3-8.

Mahmud, K., Ahmad, I., &Ayub, M. (2003).Effect of nitrogen and phosphorus on the fodder yield and quality of two sorghum cultivars (Sorghum bicolor L.).Journal of Agricultural & Biological Science, 5, 61-63.

MansouriFar, C., ModarresSanavy, S.A.M., &Saberali, S.F. (2010).Maize yield response to deficit irrigation during low-sensitive growth stages and nitrogen rate under semi-arid climatic conditions.Agricultural Water Management, 97, 12-22.

Marsalis, M.A., Angadi, S.V.,& Contreras-Govea, F.E. (2010). Dry matter yield and nutritive value of corn, forage sorghum, and BMR forage sorghum at different plant populations and nitrogen rates. Field Crops Research, 116, 52-57

Micheal, A.M., &Ojha, T.P. (1987).Principles of agricultural engineering. Vol. II. New Delhi Jain Brothers Publisher.320 p.

Milbourn, G.M., &Harwick, R.C. (1968).The growth of vining peas. I. The effect of time of sowing. Journal of Agricultural ScienceCambridge, 70, 393-402.

Monneveux, P., Zaidi, P.H. and Sanchez, C. (2005). Population density and low nitrogen affects yield-associated traits in tropical maize. Crop Science, 45, 535-545.

O’Neill, P.M., Shanahan, J.F., Schepers, J.S., & Caldwell, B. (2004).Agronomic responses of corn hybrids from different eras to deficit and adequate levels of water and nitrogen.Agronomy Journal, 96, 1660-1667.

Qing, H., Yao, Y., Xiao, Y., Hu, F., Sun, Y., Zhou, C., &An, S. (2011). Invasive and native tall forms of Spartinaalterniflora respond differently to nitrogen availability. ActaOecologica, 37, 23-30.

Turgut, I. (2000). Effects of plant populations and nitrogen doses on fresh ear yield and yield components of sweet corn grown under Bursa conditions.Turkish Journal of Agriculture and Forestry, 24, 341-347.

Tyler, A.C., Mastronicola, T.A., &McGlathery, K.J. (2003).Nitrogen fixation and nitrogen limitation of primary production along a natural marsh chronosequence.Oecologia, 136, 431-438.

Valiela, I., Teal, J.M., &Persson, N.Y. (1976). Production and dynamics of experimentally enriched salt marsh vegetation: belowground biomass. Limnology and Oceanography, 21, 245-252.

Vanderlip, R.L. (2012).How a sorghum plant develops. Kansas State University Press.20 p.

Young, K.J., & Long, S.P. (2000). Crop ecosystem responses to climatic change: maize and sorghum. In: Reddy K.R, Hodges H.F (ed) Climate change and global crop productivity. CABI Publishing, Wallingford.

Zhao, D., Reddy, K.R., Kakani,V.G., & Reddy, V.R. (2005). Nitrogen deficiency effects on plant growth, leaf photosynthesis and hyperspectral reflectance properties of sorghum. European Journal of Agronomy, 22, 391-403.