In the framework of the PRIN project ‘Optimisation of agro-environmental scenarios for bioenergy crops’ of the Italian Ministry of University and Research (MIUR), a field experiment was carried out, where two fibre sorghum genotypes (H128 and H133), 3 sowing date (April the 24th, May the 16th and July the 29th) and two irrigation treatments (I1 = 100% of ETm restoration until crop maturity; I2= 100% of ETm restoration until stem elongation were studied. The final yield was significantly affected by all the studied treatments. The genotype H133, in the average of the other factors, showed to be significantly more productive than H128 genotype (18.98 against 16.18 t ha-1 in the average of other factors, respectivelyfor the two genotypes). The second sowing date (May) showed to be more productive than the third one (July) and the first one (April) (21.21 t ha-1; 16.23 t ha-1 e 15.3 t ha-1 respectively). The last sowing time allowed the saving of 57% of irrigation water in comparison with the second sowing date because could make use used of the early autumnal rains. The reduction of the amount of water supply (from I1 to I2) in the average of the other treatments, determined a yield decrease by 37% (21.31 against 13.86 t ha-1).
Biomass yield of fibre sorghum (Sorghum bicolor (L.) Moench) under different sowing times and water supply
COSENTINO, Salvatore;
2009-01-01
Abstract
In the framework of the PRIN project ‘Optimisation of agro-environmental scenarios for bioenergy crops’ of the Italian Ministry of University and Research (MIUR), a field experiment was carried out, where two fibre sorghum genotypes (H128 and H133), 3 sowing date (April the 24th, May the 16th and July the 29th) and two irrigation treatments (I1 = 100% of ETm restoration until crop maturity; I2= 100% of ETm restoration until stem elongation were studied. The final yield was significantly affected by all the studied treatments. The genotype H133, in the average of the other factors, showed to be significantly more productive than H128 genotype (18.98 against 16.18 t ha-1 in the average of other factors, respectivelyfor the two genotypes). The second sowing date (May) showed to be more productive than the third one (July) and the first one (April) (21.21 t ha-1; 16.23 t ha-1 e 15.3 t ha-1 respectively). The last sowing time allowed the saving of 57% of irrigation water in comparison with the second sowing date because could make use used of the early autumnal rains. The reduction of the amount of water supply (from I1 to I2) in the average of the other treatments, determined a yield decrease by 37% (21.31 against 13.86 t ha-1).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
