Bu çalismada, tarim kimyasallarinin sebep oldugu etkiler analiz edilmeye çalisilmistir. Tarim kimyasallarinin en iyi alternatifi biyogübrelerdir. Ürün eldesi ve toprak verimliliginin tekrar kazanilmasi için biyogübrelerin oynadigi faydali rol iyi anlasilmalidir. Bu sebeple, mevcut çalisma, tarim kimyasallari [gübreler (üre), mantar öldürücü (carbendazim) ve böcek öldürücü (endosulfan)] ile biyogübreleri (Azotobacter sp.) karsilastirmaktadir. Deneyler, fidanlik sartlarindaki darilar üzerinde ve mevcut Tamamen Raslantisal Blok Tasarim (TRBT) yönteminde degisiklikler yapilarak gerçeklestirilmistir. Yukarida bahsedilen uygulamalarin etkileri dari büyümesi, fitokimyasal yogunluklar, toprak verimlilik seviyeleri ve mikrobiyal popülasyon bazinda arastirilmistir. Azotobacter sp. uygulamasi ve tavsiye edilen üre dozu diger tarim kimyasallari ile karsilastirildiginda iyi sonuç vermistir. Tarim kimyasallarinin yogunlugu arttikça, bitki büyümesi azalmistir. Bu çalismadan, tarim kimyasallari kullaniminin, genelde bitkinin biyotik özelliklerini ve toprak ekolojisini ciddi sekilde rahatsiz ettigi anlasilmistir.
In the present study, the effort has been taken to analyze the effects caused by agrochemicals. The best alternative to agrochemicals is biofertilizers. It is necessary to understand the beneficial role played by biofertilizer in crop production and regaining the soil fertility. Thus, the present study compares the effect of agrochemicals [fertilizers (urea), fungicide (carbendazim) and insecticide (endosulfan)] and biofertilizers (Azotobacter sp.) on maize under nursery trials were carried out in Complete Randomized Block Design (CRBD) by altering the present recommendation. The effect of above-mentioned treatments was studied based on the maize growth, phytochemical concentrations, soil fertility level and microbial population. The treatment with Azotobacter sp. and actual recommended dose of urea were performing well when compared to other agrochemical treatments. The higher the concentration of agrochemical application, lower is the plant growth. It is incurred from the study that generally the usage of agrochemicals was seriously disturbing plant biotic characters and soil ecology.
Adesemoye AO, Torbert HA, Kloepper JW (2009) Plant growth-promoting rhizobacteria allow reduced application rates of chemical fertilizers. Microbial Ecology 58: 921-929.
Al-Taweil HI, Osman MB, Hamid AA, Wan Yusoff WM (2009) Development of Microbial Inoculants and the Impact of Soil Application on Rice Seedlings Growth. American Journal of Agricultural and Biological Sciences 4(1): 79-82
Anonymous (1984) Environmental Health Criteria 40. Endosulfan. International programme on chemical safety, WHO, Geneva.
Ayoola OT, Makinde EA (2009) Maize growth, yield and soil nutrient changes within-enriched organic fertilizers. African Journal of Food Agriculture and Nutrition Development 9(1): 580- 587.
Bakulin MK, Grudtsyna AS, Pletneva AY (2007) Biological fixation of nitrogen and growth of bacteria of the Genus Azotobacter in liquid media in the presence of Perfluorocarbons. Applied Biochemistry and Microbiology 43(4): 399-402.
Barabasz WD, Albinska M, Jaskowska J, Lipiec (2001) Biological effects of mineral nitrogen fertilization on soil microorganisms. Polish Journal of Environmental Studies 11(3): 193-198.
Britto DT, Kronzucker HJ (2002) NH4 + toxicity in higher plants: a critical review. Journal of Plant Physiology 159: 567-584.
Burger M, Jackson LE (2003) Microbial immobilization of ammonium and nitrate in relation to ammonification and nitrification rates in organic and conventional cropping systems. Soil Biology and Biochemistry 35: 29-36.
Cycon M, Piotrowska-Seget Z (2007) Effect of selected pesticides on soil microflora involved in organic matter and nitrogen transformations: pot experiment. Polish Journal of Ecology 55: 207-220.
Cycon M, Piotrowska-Seget Z (2009) Changes in bacterial diversity and community structure following pesticides addition to soil estimated by cultivation technique. Ecotoxicology 18: 632-642.
Dordas CA, Anastasios S, Lithourgidis, Matsi T, Barbayiannis N (2008) Application of liquid cattle manure and inorganic fertilizers affect dry matter, nitrogen accumulation and partitioning in maize. Nutrient Cycle in Agroecosystems 80: 283-296.
Eghball B, Power JF (1999) Composted and noncomposted manure application to conventional and no-tillage systems: corn yield and nitrogen uptake. Agronomy Journal 91: 819-825.
Gryndler M, Hrselova H, Striteska D (2000) Effect of soil bacteria on hyphal growth of the arbuscular mycorrhizal fungus Glomus claroideum. Folia Microbiology 45: 545-551.
Hafeez HF, Safdar ME, Chaudhary AU, Malik KA (2004) Rhizobial inoculation improves seedling emergence, nutrient uptake and growth of cotton. Australian Journal of Experimental Agriculture 44: 617-622.
Jackson ML (1973) Soil Chemical Analysis. Prentice Hall of India (Pvt) ltd. New Delhi. Jayashree R, Vasudevan N (2007) Persistence and distribution of endosulfan under field condition. Environmental Monitoring and Assessment 131: 475-487.
Marschner H, Dell B (1994) Nutrient uptake in mycorrhizal symbiosis. Plant Soil 159: 89-102.
McGonigle TP, Evans DG, Miller MH (1990) Effect of degree of soil disturbance on mycorrhizal colonization and phosphorus absorption by maize in growth chamber and field experiments. New Phytology 116: 629-636.
Nichols KA, Wright SF (2004) Contributions of soil fungi to organic matter in agricultural soils. In: Magdoff F, Weil R (eds.), Functions and Management of Soil Organic Matter in Agroecosystems. CRC Press, CRC Press, Boca Raton, FL, 179-198.
Ortas I, Varma A (2007) Field trials of bioinoculants. Soil Biology 11: 397-413. Rajeshkannan V, Sumathi CS, Manian S (2009) Arbuscular mycorrhizal fungi colonization in upland rice as influenced by agrochemical application. Rice Science 16: 307-313.
Renck A, Lehmann J (2004) Rapid water flow and transport of inorganic and organic nitrogen in a highly aggregated tropical soil. Soil Science 169: 330-341.
Schenck NC, Perez Y (1990) Manual for identification of the VA mycorrhizal fungi. Synergistic Publications, Gainesville, FL.
Steiner C, Teixeira WG, Lehmann J, Nehls T, de Macêdo JLV, Blum WEH, Zech W (2007) Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil. Plant Soil 291: 275-290.
Thompson JP (1987) Decline of vesicular-arbuscular mycorrhizae in long fallow disorder of field crop and its expression in phosphorus deficiency of sunflower. Australian Journal of Agricultural Research 38: 847-867.
Trivedi P, Kumar B, Pandey A, Palni LMS (2003) Growth promotion of rice by phosphate solubilizing bioinoculants in a Himalayan location. In: Velazquez E, Rodriguez-Barrueco C (eds), First international meeting on phosphate solubilization, 291-299.
Troeh FR, Thompson LM (1993) Soils and soil fertility, Oxford University Press Inc., New York.
Witham FH, Blaydes DF, eds (1971) Experiments in plant physiology. Van Nostrand. New York.
Wright SF, Franke-Synder M, Morton JB, Upadhyaya A (1996) Time-course study and partial characterization of a protein on hyphae of arbuscular mycorrhizal fungi during active colonization of roots. Plant Soil 181: 193-203.
Wright SF, Upadhyaya A (1996) Extraction of an abundant and unusual protein of arbuscular mycorrhizal fungi. Soil Science 161: 91-112.
Wright SF, Upadhyaya A (1998) A survey of soils for aggregate stability and glomalin, a glycoprotein produced by hyphae of arbuscular mycorrhizal fungi. Plant Soil 198: 97-107.
Zhenxie Y, Wang P, Hongbin T, Hongfang Z, Lixia S (2008) Effects of types and application rates of nitrogen fertilizer on the development and nitrogen utilization of summer maize. Frontiers of Agriculture in China 2(1): 44-49.