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.
Esmaeil Rezaei-chiyaneh; Sorour Khorramdel; Parisa Garachali
Abstract
To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station ...
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To evaluate the yield components, yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.), a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station Payamenoor University of Nagadeh, Iran during growing reason of 2012-2013. The treatments included row intercropping )one row of sunflower + one row of faba bean(, strip intercropping )two rows of faba bean + four rows of sunflower, four rows of faba bean + two rows of sunflower, three rows of faba bean + three rows of sunflower( and monoculture faba bean and sunflower. The results indicated that the relay intercropping patterns had significant effect on studied traits of sunflower and faba bean (except number of seed per pod of faba bean). The highest seed yield of sunflower (4140 kg/ha) and faba bean (2567.33 kg/ha) were obtained from row intercropping and the lowest seed yield of sunflower (3136.67 kg/ha) and faba bean (1957 kg/ha) were obtained in their monoculture. The oil percentage of all intercropping treatments was higher than monoculture. The maximum land equivalent ratio (1.85) and actual yield loss (1.74) were calculated in row intercropping and the highest intercropping advantage (1.25) was achieved in four rows of faba bean + two rows of sunflower. The results showed that the use of relay intercropping results in better utilization of environmental resources and increased crop production compared to monoculture of the same species.