Effects of Different Phosphorus Levels and Associated Crops on Growth and Phosphorus Uptake of Tomato Seedlings
In this study,the pot experiment was conducted by setting three phosphorus levels with P2O5 application rates of 0(P0),100(P100)and 200(P200)mg/kg in dry substrate,and with tomato variety'Dongnong 708'as the focal plant.The associated crops were rape,arugula,mustard,radish,cucumber,lettuce,wheat,soybean and tomato,and single plant of tomato was as control.The effects of different phos-phorus level and associated crops on growth and phosphorus uptake of tomato seedlings were studied.The re-sults showed that compared with the control,at P0 level,different associated crops had no significant effect on plant height,stem diameter,dry and fresh weights,and root morphology of tomato seedlings,but phosphorus uptake was significantly promoted when accompanying with rape,lettuce,wheat and soybean.At P100 level,a total of seven associated crops,which were arugula,radish,cucumber,lettuce,wheat,soybean and toma-to,showed significant inhibiting effects on growth of tomato seedlings,and the significant inhibiting effect on the phosphorus uptake was observed when accompanying with cucumber;the significant promoting effect on phosphorus uptake was only found when accompanying with rape.At P200 level,accompanying with radish and cucumber had significant inhibiting effects on growth of tomato seedlings,while the other seven plants had no significant effect.No significant effect on phosphorus uptake was observed in either of the associated crops.
万方数据
维普
