تأثير معدل النيتروجين على إنتاج الأشطاء في القمح الصلب (Triticum durum) وإسهامها في الإنتاجية تحت الظروف البعلية والري التكميلي

G. A.  Haddad; Abdel M. M.  Abdalla

doi:10.54172/mjsc.v6i1.466

Authors

G. A. Haddad Crops Department, College of Agriculture, Omar Al-Mukhtar University, P.O. 919, Al-Bayda, Libya
Abdel M. M. Abdalla Crops Department, College of Agriculture, Omar Al-Mukhtar University, P.O. 919, Al-Bayda, Libya

DOI:

https://doi.org/10.54172/mjsc.v6i1.466

Abstract

This study has been conducted in the season of 1989–90 and 1990–91 under the conditions of Jebel El–Akhdar, Libya. Tiller production has increased with increase of nitrogen level and the lowest number of tillers was gained from plants received no nitrogen. However, tiller production was not a limited factor in ear number. The dependence of the crop in its yield was mainly on the main stem (MS), in addition to the true first leaf tiller (L₁T) and the true second leaf tiller (L₂T). Nitrogen increased the contribution of L₁T and L₂T in the yield. However, levels higher than 50 kg N ha^–1 did not give a significant increase in this respect. The overall mean contribution of MS was 80.6% and 86% in the two seasons respectively. This was attributed to the high percentage survival of the main stem (100% in both seasons) at all nitrogen levels in addition to the high number of grains per spike of the MS compared to that of tillers. Nitrogen level has no significant effect on single grain weight neither that of MS spike nor of tillers. Supplementary irrigation increased yield of the MS significantly but has no influence on the yield of tillers. This increase in yield of the MS can be attributed to the significant increase in single grain weight.

Downloads

Download data is not yet available.

References

الحداد ، القذافي عبد الله (1995) "تأثير معدل النيتروجين تحت الظروف البعلية والري التكميلي على نمو القمح الصلب وإنتاجيته ومكوناتها" ، المختار للعلوم ، العدد الثاني 59-86 . DOI: https://doi.org/10.54172/mjsc.v2i1.451

Bisco, P. V. and V. B. A Willington, 1983. Role of physiology in the production of heavy wheat yields. Yield of cereals: course papers 1983 National Agric. Center Cereal unit.

Cannell, R. Q., 1969. The tillering pattern in barley varieties. 1, production, survival & contribution to yield by component tillers. J. agric. Sci. comb. 72, 405–422. DOI: https://doi.org/10.1017/S0021859600024837

Darwinkel, A.; B. A. ten Hag and J. Kuizenga, 1977. Effect of sowing date and seed rate on crop development and grain production of winter wheat. Neth. J. agric. Sci. 25, 83–94. DOI: https://doi.org/10.18174/njas.v25i2.17134

Donald, C. M. 1968. The breeding of crop ideotypes. Euphytics 17, 385–403. DOI: https://doi.org/10.1007/BF00056241

Ishag, H. M. and M. B. Taha, 1974. Production & survival of tillers of wheat and their contribution to yield. J. agric. Sci. Camb. 83, 117–124. DOI: https://doi.org/10.1017/S0021859600047079

McLaren, J. S. 1981. Field studies on the growth and development of winter wheat. J. agric. Sci. Camb. 97, DOI: https://doi.org/10.1017/S0021859600037059

–697.

Peltonen, J. 1992. Ear development stage used for timing supplemental nitrogen application to spring wheat. Crop Sci. 32, 1029–1003. DOI: https://doi.org/10.2135/cropsci1992.0011183X003200040039x

Rowson, H. M. 1971. Tillering pattern of wheat with special reference to the shoot of coleoptile node. Aust. J. biol. Sci., 24, 829–41. DOI: https://doi.org/10.1071/BI9710829

Thorne, G. N. and D. W. Wood, 1988. Contribution of shoot categories to growth and yield of winter whcat. J. agric. Sci., Camb. 111, 285–294. DOI: https://doi.org/10.1017/S0021859600083222