In that paper was investigated agrofield influence on seeds weight to three species of cotton (Gossypium hirsutum sp.): Marismas and Coko species from Greece and Canada species from North America, in the year 2008 of investigation. It was made analysis to the following characters: rude cotton weight/plant/parcel/agrofield, strings weight/plant/parcel/agrofield, seeds weight/ plant/parcel/agrofield. The experimentation made to Experimental and Didactical Station of Timisoara, the experimental field being placed on a cambic chernozem soil. Bifactorial experience was placed in the field after subdivided parcels methods. The experimental factors established were: Factor A- agrofield (a1-N0P0K0, a2- N30P30K30, a4- N90P60K60, a5- N120P60K60, a6- N30P30K30 plus foliar fertilization); factor B- species (b1- Marismas-Greece, b2- Canada American provenance, b3- Coko- Greece). Analysis of vegetation conditions for the cotton was made during the period May- October; active vegetation period between 1st May and the first hoarfrost of autumn (the cotton needed 170-180 days from germinal seeds, to the first hoarfrost falling. In the cotton cropping the terrain uniformity and the best density insurance had a great importance specific to every species. The hidric stress was very good supported by the cotton, even when that one was accentuated. The best results to all the three species of cotton investigated were obtained on agrofield a4- N90P60K60; thus the average(x) of seeds weight/plant/parcel had the following values: to Marismas species 30,84g, to Canada species 25,21 g, and to Coko species 21,83g. In agrofield A6 where besides base fertilization 30 kg/ha active substance was applied also foliar fertilization, the seeds weight on plant was inferior both one realized in unfertilized conditions, and the one fertilized at germinal part preparation with equilibrated azoth doses, phosphorus and potassium (N30P30K30). The three species of cotton presented a good adaptability to weather conditions of Timisoara, in the year 2008.

cotton; seed production; agrofild

Presentation: oral