جستجوی مقالات مرتبط با کلیدواژه « economical yield » در نشریات گروه « اکولوژی »

To study the effects of biological and manure fertilizer on quantity and quality characteristics of roselle (Hibiscus Sabdariffa L.)، an experiment was conducted as split plot based on a randomized complete block design with three replications at the Agricultural Research Center of Zabol University، Iran during growing season of 2012-2013. Treatments included three manure level; 0، 10 and 20 t. h-1 and eight levels of biofertilizer such as control، nitroxin، bio - sulfur، biological phosphorus، nitroxin+ bio - sulfur، nitroxin+ biological phosphorus، bio - sulfur+ biological phosphorus، nitroxin+ bio - sulfur+ biological phosphorus. Different levels of manure and biofertilizer inoculation were considered as main plots and subplots، respectively. Add manure to the soil and seeds of rossel inoculant treatment was performed with bio - fertilizers before planting. Traits including plant high، stem diameter، number of branches، number of fruits per plant، biological yield and economic yield based on results، levels of manure and fertilizer treatments and their interactions on biological traits were significant. Bio- fertilizers treatments caused significant differences on all meantioned traits. Interaction between treatments showed that the maximum economic yield equal to 1290 kg. h-1 roselle consumption combined with 10 t. h-1 manure+ nitroxin. The results showed that combined use of manure and biological، rather than taking them separately in increasing economic yield and growth characteristics roselle can play an effective role.

In order to study the sowing system, row distance and weeding effect on yield and yield components of intercropped maize with peanut, this experiment was conducted, as factorial based on a RCBD with three replications at the research farm of agriculture center of Zabol University (Iran) during growing season 2011- 2012. Sowing system were four levels including sole maize, sole peanut, 50% maize + 50% peanut, 100% maize + 100% peanut as the first factor and row distance as the second factor in two levels 40 and 50 cm and weeding as third factor in three levels of non-weeding, once weeding, twice weeding. The results showed that effect of the sowing system was significant on plant height, stem diameter, Number of kernel/ear-1, Number of kernel/row-1, Number of ear/plant-1, 1000-grain weight, biological yield, economical yield and harvest index of maize. Effect of weeding was significant on studied characteristics excluding of biological yield, economical yield and harvest index. The highest economical yield was obtained from sole maize, twice weeding and density of 50 cm. The highest LER was observed from 100% maize + 100% peanut.

In order to evaluate response of Pishgam wheat cultivar to manure and biological substrate, a factorial experiment based on RBCD (randomized complot block design with 3 replications was done. The first factor was manure with three levels including 0, 7.5 and 15 ton per hectare, and second factor was biological substrata consumption including 0, 3 and 5 times. Traits under study were plant height, ear length, number of ear per square meter, number and weight of kernel in ear, 1000 kernel weight, biological and economical yield and also harvest index. Analysis of variance showed that manure had significant effect on all traits except plant height and ear length. By increasing of manure consumption from 7.5 to 15, yield component were increased. Effect of biological substrate on plant height, kernel weight in ear and 1000-kernel weight, was significant (P≤0.01). Maximum economical yield was obtained from 3 times biological substrate consumption and 15 tons manure with 26.6% increase compare to check treat. Highest biological yield was gained from 7.5 tons manure and 3 times biological substrate treatment and also the highest harvest index was earn from 7.5 tons manure and 5 times biological substrate treatment with 24.6% and 5% increasing respectively compare to check. It seems biological substrate effects in fertile soils is lower than non-fertile soils.