Anestis KARKANIS, Dimitrios J. BILALIS, Aspasia EFTHIMIADOU, Panagiotis EFTHIMIADIS

Effects of cultural practices on weed flora in Virginia (flue-cured) organic tobacco (Nicotiana tabacum L.): green manure and irrigation systems

Organic tobacco is a new industrial crop. Field experiments were conducted, during 2005-2006, to determine the effects of irrigation system and green manure on weed flora in organic tobacco crops (Nicotiana tabacum cv. NC 71). The experiments were designed as a split plot design with 4 replicates, 2 main plots (drip and sprinkler irrigation), and 3 sub-plots (vetch and red clover as green manure, and control). The greatest number and dry weight of weeds was observed in sprinkler irrigation. Our results indicate that weed distribution under drip and sprinkler irrigation is related not only to the surface soil water content but also to competition from the crop for water and light. Moreover, there were no significant differences between vetch, red clover, and the control in terms of number of weeds at site 1. In addition, at site 2, the lowest number of weeds was found in red clover plots. The main reason for weed suppression at site 2 may be attributed to the amount of red clover incorporated into the soil, 390 kg ha-1 and 270 kg ha-1, for site 2 and site 1, respectively. Red clover strongly inhibited germination and growth of barnyardgrass (Echinochloa crus-galli (L.) P.Beauv.) but only at the first sample date after transplanting of tobacco (35 days after transplanting). These results indicated that green manure and drip irrigation could be used for the suppression of weeds in organic row-crops.

Anahtar Kelimeler:

Key words: Allelopathy, drip irrigation, green manure, organic tobacco, sprinkler irrigation, weed flora

Effects of cultural practices on weed flora in Virginia (flue-cured) organic tobacco (Nicotiana tabacum L.): green manure and irrigation systems

Keywords:

Key words: Allelopathy, drip irrigation, green manure, organic tobacco, sprinkler irrigation, weed flora,

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Bilalis D, Efthimiadis P, Sidiras N (2001) Effect of three tillage systems on weed flora in a 3-year rotation with four crops. J Agron Crop Sci 186: 135-141.
Bilalis D, Karkanis A, Efthimiadou A, Konstantas AR, Triantafyllidis V (2009) Effects of irrigation system and green manure on yield and nicotine content of Virginia (Flue-cured) Organic tobacco (Nicotiana tabacum), under Mediterranean conditions. Ind Crops Prod 29: 388-394.
Bilalis D, Sidiras N, Economou G, Vakali C (2003) Effect of different levels of wheat straw soil surface coverage on weed flora in Vicia faba crops. J Agron Crop Sci 189: 223-241.
Bond W, Grundy AC (2001) Non-chemical weed management in organic farming systems. Weed Res 41: 383-405.
Booth BD, Murphy SD, Swanton CJ (2003) Weed ecology in natural and Agricultural systems. CABI Publishing. UK. pp. 255-274.
Bremner JM (1960) Determination of nitrogen in soil by Kjedahl method. J Agric Sci 55: 11-33.
Cetin O, Bilgel L (2002) Effects of different irrigation methods on shedding and yield of cotton. Agric Water Manag 54: 1-15.
Dhima KV, Vasilakoglou IB, Gatsis TD, Panou-Philotheou E, Eleftherohorinos IG (2009) Effects of aromatic plants incorporated as green manure on weed and maize development. Field Crops Res 110: 235-241.
Grattan SR, Schwankl LJ, Lanini WT (1990) Distribution of annual weeds in relation to irrigation method. Visions of the future: Proceeding of the third national irrigation symposium held in conjunction with the 11thannual international irrigation exposition October 28-November 1, Phoenix Civic Plaza, Phoenix Arizona St. Joseph, Mich (USA), American Society of Agricultural Engineers pp. 148-153.
Karkanis A, Bilalis D, Efthimiadou A (2007) Tobacco (Nicotiana tabacum) infection by branched broomrape (Orobanche ramosa) as influenced by irrigation system and fertilization, Under East Mediterranean conditions. J Agron 6: 37-402.
Khalak A, Kumaraswamy AS (1993) Weed bio-mass in relation to irrigation and mulching, and economics of mulching potato crop under conditions of acute water scarcity. J Indian Potato Assoc 20: 185-189.
Khanh TD, Chung MI, Xuan TD, Tawata S (2005) The exploitation of crop allelopathy in sustainable Agricultural production. J Agron Crop Sci 191: 172-184.
Kobayashi K (2004). Factors affecting phytotoxic activity of allelochemichals in soil. Weed Biol Manag 4: 1-7.
Korres NE, Froud-Williams RJ (2002) Effects of winter wheat cultivars and seed rate on the biological characteristics of naturally occurring weed flora. Weed Res 42: 417-428.
Liebman M, Gallandt ER (2002) Differential responses to red clover residue and ammonium nitrate by common bean and wild mustard. Weed Sci 50: 521-529.
Malash N, Flowers TJ, Ragab R (2005) Effect of irrigation systems and water management practices using saline and non-saline water on tomato production. Agric. Water Manag 78: 25-38.
Medeiros ARM, Lucchesi AA (1993) Allelopathic effects of common vetch (Vicia sativa L.) on lettuce in laboratory tests. Pesqui Agropecu Bras 28: 9-14.
Norsworthy JK, Brandenberger L, Burgos NR, Riley M (2005) Weed suppression in Vigna unguiculata with a spring-seeded Brassicaceae green manure. Crop Prot 24: 441-447.
Ohno T, Doolan K, Zibilske LM, Liebman M, Gallandt ER, Berube C (2000) Phytotoxic effects of red clover amended soils on wild mustard seedling growth. Agric Ecosyst Environ 78: 187-192.
Om H, Dhiman SD, Kumar S, Kumar H (2002) Allelopathic response of Phalaris minor to crop and weed plants in rice-wheat system. Crop Prot 21: 699-705.
Panwar LG, Yaduraju NT, Ahuja KN (2000) Population dynamics of weed flora and their growth in tall and dwarf wheats as influenced by sub-optimal levels of irrigation and nitrogen. Indian J Weed Sci 32: 164-168.
Sabra FS (2000) Population dynamics of potato weeds under three types of irrigation in newly reclaimed desert land in Egypt. Alex J Agric Res 45: 193-205.
Singh VP, Mishra JS, Yaduraju NT (2002) Impact of irrigation levels and metribuzin on weed growth and tuber yield of potato (Solanum tuberosum) under Vertisols. Indian J Agric Sci 72: 174-176.
Smith NL, Lanini WT, Grattan S, Schwank L (1988) The influence of irrigation methods on weed control in processing tomatoes. Proceedings of the Western Society of Weed Science. pp. 41- 49.
Tiwari KN, Singh A, Mal PK (2003) Effect of drip irrigation on yield of cabbage (Brassica oleracea L. var. capitata) under mulch and non-mulch conditions. AgricWater Manag 58: 19-28.
Veeraputhiran R, Kandasamy OS (2001) Weed density and weed dry weight as influenced by drip irrigation and fertigation in hybrid cotton. Indian J Weed Sci 33: 42-74.
Xuan TD, Tawata S, Khanh TD, Chung IM (2005a) Decomposition of allelopathic plants in soil. J Agron Crop Sci 191: 162-171.
Xuan TD, Tawata S, Khanh TD, Chung IM (2005b). Biological control of weeds and plant pathogens in paddy rice by exploiting plant allelopathy: An overview. Crop Prot 24: 197-206.