【摘要】 对玉米/蒜苗套作系统两作物根区进行膜隔、网隔和无隔处理,以各自单作为参比,研究了玉米/蒜苗的套作优势及地上部和地下部因素对套作优势的贡献。结果表明,玉米/蒜苗套作的生物学产量和经济学产量的LER均大于1,玉米、蒜苗的经济学产量分别增加933 k.ghm-2和3620 k.ghm-2,有明显的套作优势。套作的地上部和地下部的综合作用还促进了玉米对氮、磷、钾的吸收和蒜苗对氮、钙、镁的吸收。套作产生的地上部环境更有利于蒜苗的生长,其杂草的种类、数量和生物学产量都低于单作。更多还原

【Abstract】 The advantages of intercropping and the effect of above-ground and below-ground interactions between the two crops in a maize/garlic-sprouts intercropping system were investigated by comparing of the effects of mono-cropping and intercropping,and comparing intercropping where the root system was separated by plastic film(FS) or meshwork(MS) compared to controls with no root separation(NS).The results showed that the land equivalent ratios(LER) of both economic yield and biomass were greater than 1.The economic yield of intercropped maize and garlic-sprouts were 933 kg·ha-1 and 3620 kg·hm-2 higher than those of mono-cropped maize and garlic-sprouts,respectively,which was a clear yield advantage.The combined effect of the above-ground and the below-ground interactions between the crops resulted in an increase in the absorption of N,P and K by maize and the absorption of N,Ca and Mg by garlic-sprouts.The intercropping environment was more beneficial to the growth of garlic-sprouts and caused a reduction in the quantity of weeds compared to the mono-cropped garlic-sprouts.更多还原