麻地膜降解对土壤性质和作物产量影响的研究

为了研究麻地膜在土壤中的降解特性以及麻地膜降解后对土壤物理、化学及生物学特性和作物产量的影响,分别在春、夏、冬3个季节条件下观测RC麻地膜、JC麻地膜和塑料地膜在土壤中的降解特性;JC麻地膜分别设2层(JC2)、4层(JC4)、8层(JC8)、12层(JC12)、16层(JC16)、塑料地膜4层(P4)、8层(P8)、12层(P12)共9个处理,另设未使用地膜作对照(CK),用盆栽试验方法研究了麻地膜在土壤中的降解及对土壤性质和作物产量的影响。结果表明,麻地膜在土壤中能充分降解,温度升高可加速其降解;麻地膜降解可降低土壤容重和增加孔隙度,改善土壤三相比例,增加土壤养分,提高土壤微生物数量,培肥土壤。麻地膜埋入明显促进红麻根系生长,改善根冠比,提高了植株的养分积累量;红麻的日生长量、株高、茎粗、皮厚以及干物质量均高于对照,红麻干皮产量均明显高于CK,并且有随着麻地膜埋入量的增加而提高之势。塑料地膜的埋入则恶化了土壤生态环境,影响了红麻生长发育而造成减产。因此,麻地膜的埋入能够改善土壤生态环境,同时促进作物生长发育及产量的提高。

Effects of Degradation with Bast Fiber Mulching Film on Soil Properties and Crop Yields

The degrading properties of bast fiber mulching film in soil and the effects of degraded film on soil physical,chemical and biological properties and plant yields were characterized in this paper.The degradable characteristics of RC,JC bast fiber mulching film and plastic film were observed respectively in spring,summer and winter seasons.The effects of degraded bast fiber mulching film in the soil on soil properties and plant yields were carried out in pot trials with nine treatments,including no mulching ...