新源县制种玉米田地膜残留特征研究

Characteristics of Mulch Film Residues in Seed-production Corn Fields in Xinyuan County

地膜残留对农田土壤安全和作物产量具有极大的威胁,掌握农田地膜残留特征可为采取高效治理措施提供重要依据。本文以新源县制种玉米田为研究对象,并选取覆膜0~5年、6~10年、11~15年和16~20年的地块进行地膜残留取样。结果表明:随着覆膜年限的增加,新源县制种玉米田残膜含量呈显著增加趋势,覆膜16~20年残膜量最大,可达83 kg/hm2。对比各土层残膜占比,上层(0~10 cm)土层一直最高,中层(11~20 cm)土层次之,下层(21~30 cm)土层最低。

Mulch film residues pose a great threat to farmland soil safety and crop yields. Knowing the characteristics of farmland mulch film residues can provide an important basis for taking effective control measures. This paper took the seed-producing corn field in Xinyuan County as the research object, and selected the plots covered with mulch film for 0-5 years, 6-10 years, 11-15 years and 16-20 years to sample the residual mulch film. The results showed that with the increase of film mulching years, the residual film content of the seed-producing corn fields in Xinyuan County showed a significant increase trend, and content of the residual film covered for 16-20 years was the largest, reaching 83 kg/hm2. Comparing the proportion of residual film in each soil layer, the upper(0-10 cm) soil layer was always the highest, the middle(11-20 cm) soil layer was followed, and the lower(21-30 cm) soil layer was the lowest.