关键词: 秸秆还田, 水稻僵苗, 土壤性状, 小麦-水稻两熟

Abstract: [Objective] In order to explore the impact of straw returning patterns on the early growth stage of transplanted rice seedlings and the properties of paddy soil. [Method] In this research, compare with residue mulch(RM) and residue remove(RR), a field experiment was carried out on wheat straw residue incorporation(RI), to determine the characteristics of the agronomic traits of rice seedlings after transplant and soil properties(i.e., pH, electrical conductivity, oxidation reduction potential and Fe²⁺ concentration). [Results] Compared to that for RR and RM, RI decreased tiller number, fresh weight and dry weight of rice seedlings. From rice transplanting to the early period of soil aeration, RI increased electrical conductivity and Fe²⁺ concentration, but decreased soil pH and oxidation reduction potential. No significant effect of wheat straw returning patterns on effective tiller number, grain number per panicle, 1 000-grain weight and yield was observed. [Conclusion] Wheat straw residue incorporation caused negative effects on rice seedlings, but no significant effect on rice yield and its components was observed. The change in soil properties, including pH, electrical conductivity, oxidation reduction potential and Fe²⁺ concentration, might have important contribution to the stunted growth of rice seedlings.

Key words: wheat straw residue incorporation, stunty rice seedlings, soil property, rice-wheat cropping system