Allelopathy of decomposed maize straw products on three soil-born diseases of wheat and the analysis by GC-MS

作者：Yongzhi Qi, Wenchao Zhen, Haiyan Li · 发表于：Journal of Integrative Agriculture · 年份：2015 · DOI：10.1016/s2095-3119(14)60795-4 · 被引用次数：36 · 研究领域：Allelopathy and phytotoxic interactions、Plant Parasitism and Resistance、Seed Germination and Physiology

In northern China, the soil-born diseases of wheat have been getting more and more serious under a new farming system that returns maize straw to the field. In order to investigate the allelopathy of the decomposed maize straw products on three soil-born diseases of wheat, culture dish and pot experiments were conducted and the compounds in the products were identified by gas chromatography-mass spectrometry (GC-MS). Culture dish experiments showed that the mycelial growth, sclerotia formation amount and total weight of Rhizoctonia cerealis were promoted at concentrations of 0.03, 0.06 and 0.12 g mL−1 and inhibited at concentration of 0.48 g mL−1 of the decomposed products. No significant effects were found of the product concentrations on average weight of the sclerotia. Mycelial growth of Gaeumannomyces graminis was promoted at almost all concentrations except the highest one. Mycelial growth and spore germination of Bipolaris sorokiniana were significantly inhibited by all concentrations of the decomposed products, with enhanced inhibition effects along with the increased concentrations. The length, number and dry weight of roots together with the root superoxide dismutase activity were promoted by the lowest concentration (0.03 g mL−1), with a synthetic effect index of 0.012, and inhibited by other concentrations. The ion leakage of roots was increased and the root peroxidase activity of roots was lowered by all the treatments. Pot experiments revealed that occurrence of ...