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Increasing world population demands for food, limited natural resources have created the risk of food security for  current and future generations. Intercropping is regarded as an effective strategy in sustainable agriculture. Therefore,  current study was carried out to evaluate the nutrient uptake of onion and fenugreek intercropping system during two  growing season of (2015-2016 and 2016-2017) at a research field in Kerman, Iran. Two factorial experiments based on  completely random blocks design with three replications were carried out. The treatments in this study were including:  onion densities as the first factor (30, 25 and 20 plants m-2) and fenugreek densities as the second factor at three levels  of 25, 15 and 12 plants m-2 with sole cropping of two species at these densities. Results showed that in the both of years, mineral concentration and uptake (N, P and K) of onion leaf and bulb and fenugreek in intercropping increased  in comparison with mono cropping for two species. In both years, the highest and lowest nutrient content of onion was  observed in the densities of 30 and 20 plant m-2. In general, it can be said that intercropping systems have some positive  effects on nutrient content and uptake of onion.

Effects of Additive Intercropping on Mineral Uptake of Onion and Fenugreek at Different Densities