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.
Sara Ghanbari; Mohammad Moradi Telavat; Seyyed Ataollah Siadat
Abstract
In order to determinate the optimum combination of barley with fenugreek in intercropping under cow manure levels, an experiment was conducted as split plot based on a randomized complete blocks design with three replications at the research farm of Ramin Agriculture and Natural Resources University ...
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In order to determinate the optimum combination of barley with fenugreek in intercropping under cow manure levels, an experiment was conducted as split plot based on a randomized complete blocks design with three replications at the research farm of Ramin Agriculture and Natural Resources University of Khouzestan during growing season of 2014-15. In this study, four manure levels (0, 12, 24 and 36 t.ha-1) were placed in the main plots, and eight levels of replacing and increasing ratios of intercropped cultures including 75% barley + 25% fenugreek, 50% barley + 50% fenugreek, 25% barley + 75% fenugreek, 100% barley + 16.6% fenugreek, 100% barley + 33.3% fenugreek, 100% barley + 50% fenugreek and pure cultures of both plant were placed in sub-plots. The results showed that the highest barley dry forage yield (2850 kg.h-1) was obtained from treatment of Sole barley by application of 36 ton.ha-1 manure, also the highest fenugreek dry forage yield (1633.33 kg.h-1) was obtained from treatment of Sole fenugreek by application of 24 ton.ha-1 manure. According to the highest System Productivity Index (SPI = 2933.29) from two treatment of 100% barley + 50% fenugreek and 100% barley + 33.3% fenugreek by application 36 ton.ha-1 manure, An increase of culture at 36 ton.ha-1 of manure was the best composition in the present experiment. Also the Land equivalent ratio and aggressivity index was obtained in increasing ratios of intercropped cultures and with application of 36 ton.ha-1 manure more than one. Therefore, in this study, barley and fenugreek were introduced two species compatible combinations of intercropping.