Abstract
Production and nutritional characteristics of sunflowers and paiaguas palisadegrass under different forage systems in the off season
Highlights
From an agricultural perspective, the sunflower crop has desirable traits, including a short cycle, high quality and good oil yield (CASTRO; FARIAS, 2005)
The experimental design consisted of randomized blocks with four replicates and used the following forage systems: sunflower monocropped; Paiaguas palisadegrass monocropped; sunflower row-intercropped with Paiaguas palisadegrass; sunflower inter-row intercropped with Paiaguas palisadegrass; and sunflower oversown and intercropped with Paiaguas palisadegrass
Harvest was performed manually at 130 days after the emergence (DAE) at the time when the plants reached the physiological maturity stage, and the following parameters were assessed in the useful area of the plot at harvest: head diameter was measured in ten randomly chosen plants; dry mass yield from the stem and leaf collection from all plot plants was determined by placing the plant material in an oven at 55 oC until a constant mass was reached, with the dry weight converted to kg ha-1; 1000-achene mass was determined by weighing 1000 achenes and was expressed in grams, with the moisture adjusted to 13%; and achene productivity was determined by threshing the heads, weighing the achenes, adjusting the moisture to 13% and converting the data to kg ha-1
Summary
The sunflower crop has desirable traits, including a short cycle, high quality and good oil yield (CASTRO; FARIAS, 2005). The high efficiency of sunflowers in extracting water from the soil under water stress conditions and their tolerance to a wide temperature range without noticeable effects on production are factors that promote sunflower cultivation in the offseason (BRIGHENTI et al, 2008) Another key factor for sunflower cultivation in the offseason is the choice of achene for oil production, which has a higher market value than soybean oil for human nutrition and decreases the idleness of beneficiary industries, optimizing the use of land, machinery and manpower (CAPONE et al, 2011).
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