Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system

doi:10.11686/cyxb2015235

Abstract

Abstract: Nitrogen is one of the greatest nutritional resources in agriculture, affecting the yield advantage of many intercrop systems. However, it is unclear how nitrogen application affects oil flax and soybean intercrop systems in northern dry farming land. A field experiment was conducted to explore productivity, interaction and yield under intercropping supplemented with different nitrogen rates (0, 75 and 150 kg N/ha). Oil flax/soybean intercropping systems exhibited interspecific advantages. The land equivalent ratio (LER) based on biomass and yield were greater than 1. With increased nitrogen application, the LER initially increased before peaking at 75 kg N/ha, 1.25 and 1.30 respectively for biomass and yield, and subsequently declining. The interspecific competition ability of oil flax was better than soybean under 0 and 75 kg N/ha, and weaker under 150 kg N/ha. The yield and biomass of oil flax/soybean intercrop systems were maximized at 75 kg N/ha, achieving 2440.5 and 7594.3 kg/ha respectively.

YANG Ping, LI Jie, ZHANG Zhong-Kai, CUI Zheng-Jun, YANG Tian-Qing, NIU Jun-Yi. Effect of nitrogen application on intercropping advantages and crop interactions under an oil flax and soybean intercrop system[J]. Acta Prataculturae Sinica, 2016, 25(3): 181-190.

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