In this paper is studied the phenotipical variability of three cotton species (Gossypium hirsutum sp.): Marismas, Canada, and Coko in the investigation year 2008. It was analized the following characters: blank cotton weight/ plant/ parcel/ agrofund, fibres      weight/ plant/ parcel/ agrofund, seeds weight /plant/ parcel/ agrofund. The test was made at Didactic Station Timisoara, the experimental field being placed into a plane microrelief with large area hollow, on a sol of cambic chernozem type. The bifactorial experience was placed in the field after subdivided parcels methods. The established experimental factors were: factor A – agrofund (a 1 -N 0 P 0 K 0 , a 2 – N 30 P 30 K 30 , a 3 - N 60 P 30 K 30 , a 4 - N 90 P 60 K 60 , a 5 - N 120 P 60 K 60 , a 6 - N 30 P 30 K 30 + foliar fertilization); factor B – the species (b 1 - Marismas- Greece, b 2 - American provenance, b 3 - Coko- Greece). The vegetation conditions analysis for the cotton is made during the period May- October; active vegetation period situated between 1 st May and the first autumn hoarfrost. In the cotton crop it must to have in mind the field uniformity and also the insurance of the best density to each species. The three cotton species presented a good adaptability to weather conditions from Timisoara. The cotton has the capacity to acclimate itself at lower humidity, from plant with hydrophilic aspect, and it receives fairly quickly xerofit plant features. The best results were obtained at all tree analyzed varieties in the a 4 - N 90 P 60 K 60 agrofonds. So, the fibres weight/ plant/ parcel was at 110,58g – Marismas variety, 113,08 g – Canada variety, 101,79 g – Coko variety. The seeds weight /plant/ parcel was at 154,22 g – Marismas variety, 126,07g –  Canada variety, 119,72 g – Coko variety. The blank cotton weight/ plant/ parcel was at 264,80 g – Marismas variety, 239,15 g – Canada variety, 221,51 g – Coko variety.

cotton species; characters; agrofunds; fertilisation

Presentation: oral