【摘要】 取北方5种作物轮作茬口和休闲土壤种植火豆、玉米、小麦、亚麻和甜菜,出苗后22 d制备作物的根渗出物,观察其对大豆胞囊线虫卯孵化的影响。试验表明,麦豆麦迎茬的甜菜根渗出物在后期大豆胞囊线虫(SCN)的卵孵化率最高,豆麦米轮作茬的大豆根渗出物9 d后SCN的卵孵化率明显高于其它作物,米豆米茬口的玉米根渗出物SCN的卵孵化率较高,豆麦豆迎茬甜菜根渗出物SCN的卵孵化率明显高于所有供试作物,12年大豆连作茬甜菜从一开始卵孵化率就高于对照和其它4种作物,休闲区的5种作物根渗出物也有对SCN卵孵化的刺激作用。更多还原

【Abstract】 The effects of 5 crops from 5 rotation systems and fallow soil on egg hatch of H. glycines were determined under laboratory conditions. Crops tested included soybean, corn, wheat, flax and sugar beet. Five rotation systems were wheat-soybean-wheat (WSW), soybean-wheat-corn (SWC), corn-soybean-corn (CSC), soybean-wheat-soybean (SWS), continuous soybean (SSS…S 12 years). Root diffusate from sugar beet on WSW, SWS and SSS…S 12 years caused greater hatch of H. glycines than other crops on the same rotation system. Diffusate from soybean root on SWC and corn root on CSC stimulated the egg hatch more than any of the other crops on the same rotation system. Root diffusate from 5 crops on fallow soil also stimulated egg hatch of H. glycines.更多还原