Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

摘要

cqvip:Utilization and transfer of nitrogen(N)in a strip intercropping system of garlic(Allium sativum L.)and broad bean(Vicia faba L.)have been investigated rarely.The objectives of this study were to quantify N uptake and utilization by intercropped broad bean and garlic and determine the magnitude of N transfer from broad bean to garlic.Field and pot trials were carried out in the Erhai Lake Basin in China using ^(15)N tracer applied to the soil or injected into broad bean plants.Strip intercropping of garlic and broad bean increased N absorption(47.2%)compared with sole crop broad bean(31.9%)or sole crop garlic(40.7%)and reduced soil residual N.Nearly 15%of ^(15)N injected into petioles of broad bean intercropped with garlic was recovered in garlic at harvest,suggesting that N could be transferred from broad bean to strip intercropped garlic.The findings provide a basis for evaluating legumes’role in optimizing N fertilization when intercropped with non-legumes.