AGRONOMIC CHARACTERISTICS AND YIELD OF SUNFLOWER AT DIFFERENT TIMES OF SOWING AND PLANT POPULATIONS IN THE HOLLOW OF BAHIA

作者：Batista de Souza Luiz Henrique; Peixoto Clovis Pereira; da Silveira Patricia Souza; da Silva Ledo Carlos Alberto; Lima Valmir Pereira; dos Santos Astrogildo Peixoto S G

来源：Bioscience Journal, 2014, 30(3): 90-100.

• Helianthus annuus L.
• Yield components of plant
• Productivity

The objective of this work was to evaluate the agronomic and productive characteristics of cultivating of sunflower, Embrapa 122, sown at different times and plant populations for the Bahian Reconcavo. The experiments had been carried through in the area of the Experimental Station of the EBDA, in the city of Conceicao of the Almeida/BA and in the Bahian IF, in the city of Catu/BA. For each experiment, we used the randomized block design with four treatments and four repetitions. The treatments were T1 (35.000 plants ha(-1)), T2 (45.000 plants ha(-1)), T3 (55.000 plants ha(-1)) and T4 (75.000 plants ha(-1)). At physiological maturity (R9) when evaluated for final plant height (AP), stem diameter (DH), diameter of chapters (DC), mass of 1000 seeds (M1000) and harvest index (IC), determined by the ratio between the total dry matter accumulated from the last collection and production achene weight and achene plot useful for determining the yield (kg ha(-1)), with the correction of the humidity to 13%. Positive interaction between the time factors occurred throughout the growth in AP, DH and NF. The sowing dates and plant populations' proposals may have been negatively influenced by low rainfall observed in two locations that caused a reduction in head diameter, weight of 1000 seeds and thus reduced productivity.

• 出版日期2014-6