文献类型： 外文期刊
作者： Ye, Xiaoxin 1 ; Chen, Jie 2 ; McErlean, Christopher S. P. 3 ; Zhang, Meng 4 ; Yu, Rui 1 ; Ma, Yongqing 1 ;
作者机构： 1.Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
3.Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia
4.Henan Acad Agr Sci, Inst Plant Nutr & Environm Resources, Zhengzhou 450002, Henan, Peoples R China
5.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming, Yangling 712100, Shaanxi, Peoples R China
关键词： Foxtail millet;Rhizosphere soil;Sunflower broomrape (SB);Trap crop;Germination
期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： Heavy infestation of large areas in China by the root parasitic sunflower broomrape (Orobanche cumana Wallr.) constitutes a major threat to sunflower production. This study was conducted to investigate the potential of foxtail millet as a trap crop for the management of sunflower broomrape (SB). To assay the ability of foxtail millet to stimulate germination of SB seeds, the rhizosphere soil of six foxtail millet cultivars cultured in various sand/soil ratios and fertilizer levels were employed to directly induce SB germination. Among all sand/soil treatments, Hong Guzi grown in a 1: 1 sand/soil ratio induced the highest germination of SB (30.1%). Phosphorus resulted in a small but significantly higher germination of SB compared with the control without any fertilizer, while in contrast, nitrogen greatly suppressed the germination inducing capacity of foxtail millet even at concentrations as low as 28 mg kg(-1) soil (based on N). Cropping rotation experiment was undertaken to quantify the effect of foxtail millet on SB infection in a subsequent sunflower crop. All foxtail millet rotation treatments reduced broomrape infection and gave higher shoot and flower disk dry mass of sunflowers than the control grown without a fore-rotating crop. These results suggest that efficacious cultivars of foxtail millet reduce SB parasitism and increase sunflower yields and that using foxtail millet as trap crop is probably an effective way to reduce the broomrape weed problem in China, especially in the dry, infertile, and sandy soils of the Loess Plateau.
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