科研之友
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摘要
Four soybean cultivars (%26apos;Atlantic%26apos;, %26apos;Cresie, %26apos;Pr91m10%26apos; and %26apos;Regir%26apos;), selected through a theoretical procedure as suitable for cultivation in BLSS, were evaluated in terms of growth and production. Germination percentage and Mean Germination Time (MGT) were measured. Plants were cultivated in a growth chamber equipped with a recirculating hydroponic system (Nutrient Film Technique). Cultivation was performed under controlled environmental conditions (12 h photoperiod, light intensity 350 mu mol m(-2) s(-1), temperature regime 26/20 degrees C light/dark, relative humidity 65-75%). Fertigation was performed with a standard Hoagland solution, modified for soybean specific requirements, and EC and pH were kept at 2.0 dS m(-1) and 5.5 respectively. %26lt;br%26gt;The percentage of germination was high (from 86.9% in %26apos;Cresir%26apos; to 96.8% in %26apos;Regilland the MGT was similar for all the cultivars (4.3 days). The growing cycle lasted from 114 in %26apos;Cresir%26apos; to 133 days on average in the other cultivars. Differences in plant size were recorded, with %26apos;Pr91m10%26apos; plants being the shortest (58 vs 106 cm). Cultivars did not differ significantly in seed yield (12 g plant(-1)) and in non edible biomass (waste), water consumption and biomass conversion efficiency (water, radiation and acid use indexes). `Pr91m10%26apos; showed the highest protein content in the seeds (35.6% vs 33.3% on average in the other cultivars). %26lt;br%26gt;Results from the cultivation experiment showed good performances of the four cultivars in hydroponics. The overall analysis suggests that %26apos;Pr91m10%26apos; could be the best candidate for the cultivation in a BLSS, coupling the small plant size and the good yield with high resource use efficiency and good seed quality.
- 出版日期2012-12-1
