Mojtaba Salehi Sheikhi; Ali Nakhzari Moghaddam; ali Rahemi karizaki; Majid Mohamad Eamaeili
Abstract
In order to investigate the effect of pea (Pisum sativum L.) cultivar as well as replacement and additive intercropping ratios of pea and spinach (Spinacia oleracea L.) on yield and competition indices, a factorial experiment has been conducted based on randomized complete block design with three replications ...
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In order to investigate the effect of pea (Pisum sativum L.) cultivar as well as replacement and additive intercropping ratios of pea and spinach (Spinacia oleracea L.) on yield and competition indices, a factorial experiment has been conducted based on randomized complete block design with three replications at Gonbad Kavous University research field during 2016-2017. Intercropping ratios at nine levels consisted of pure pea, pure spinach, 33%, 50%, and 67% spinach instead of pea, addition series of 33%, 50%, 67%, and 100% spinach to pea. Also, pea cultivars have been Shamshiri and Pofaki. Land equivalent ratio and relative crowding coefficient in additive treatments have been more than replacement treatments, above one in all treatments. The highest land equivalent ratio with 1.333 has been observed in 100% pea + 100% spinach. In replacement series, pea has been the dominant plant, while in additive series spinach has dominated. No actual yield loss is observed in all treatments. The highest system productivity index has been related to 100% pea + 100% spinach with 3045. Overall, the land equivalent ratio of more than one and positive system productivity index of especial treatment, equal to 100% pea + 100% spinach indicate the benefit of pea and spinach intercropping.
Ali Nakhzari Moghaddam; Mojtaba Salehi Sheikhi; ali Rahemi karizaki; Majid Mohamad Eamaeili
Abstract
In order to investigate the effect of pea cultivars and planting pattern on yield and seed protein of pea, total yield and LER, a factorial experiment (two factors) was conducted in a randomized complete block design with three replications in research farm of Gonbad Kavous University during 2016-2017. ...
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In order to investigate the effect of pea cultivars and planting pattern on yield and seed protein of pea, total yield and LER, a factorial experiment (two factors) was conducted in a randomized complete block design with three replications in research farm of Gonbad Kavous University during 2016-2017. In this experiment, two cultivars of pea (Poffaki (Aspersion) and Shamshiri (Swordfish)) and a native variety of spinach were used. Nine planting pattern i.e. sole pea and spinach, replacement series of 33, 50 and 67% spinach instead of pea and additive series of 33, 50, 67 and 100% spinach to pea. Effect of pea cultivar and planting pattern were significant on most of traits. Plant length, 100-seed weight, pod weight, pod yield per plant, fresh weight of pea plant and pod yield in Poffaki was higher than Shamshiri but number of pod per plant and harvest index in Shamshiri was higher than Poffaki. Number of pod per plant, pod weight, pod yield per plant, 100-seed weight, harvest index, and fresh weight of pea in sole pea and replacement series was higher than additive series. Addition of spinach in additive series reduced traits of pea but total yield increased. According to the results, yield of Poffaki cultivar was 11.81% higher than Shamshiri and the highest total yield with 30.1 ton/ha obtained from additive series of 100% pea + 100% spinach. Land equivalent ratio (LER) was over than 1 in all intercropping treatments that indicates the superiority of intercropping.