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.
Neda Pakgohar; Ahmad Ghanbari
Abstract
This experiment was conductee as a RCBD at a research farm at Kerman in Spring 2012 using millet and green pea as intercrop. The treatments were cultivation of sole nutrifid millet and green pea, 75% millet+25% green pea and vice versa, 50% millet+50% green pea, cultivation of mix seeds of two crops ...
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This experiment was conductee as a RCBD at a research farm at Kerman in Spring 2012 using millet and green pea as intercrop. The treatments were cultivation of sole nutrifid millet and green pea, 75% millet+25% green pea and vice versa, 50% millet+50% green pea, cultivation of mix seeds of two crops on the same row. The highest and lowest dry forage yield was obtained from sole millet and green pea. The ratio of 75% and 50% of millet was not significantly different with sole millet. Mineral nutrition uptake of intercrop was higher than sole ones. The intercrop treatments were not significantly different for N uptake, except for mixed cropping, while the highest uptake of P and K were recorded for 75% millet + 25% green pea. Mean RYT of 1.68 obtained from intercrop indicates the complementarity of two crops. Competition ratio of millet to green pea for N, P, K, Fe, Mn, Cu and Zn was more than 1 showing the higher competition ratio of millet compared to green pea. Aggressivity of millet was positive implying the dominancy of millet. Dry forage production near to sole millet, mean RYT of about 2 for mineral uptake, competition ratio of more than 1 and a positive aggressivity value indicates that 75% millet+25% green pea is the best planting ratio.