地膜覆盖对赣薯2号外观品质及产量的影响

研究了在江西省红壤旱地上地膜覆盖对赣薯2号外观品质及产量的影响,结果表明:地膜覆盖能明显提高赣薯2号的鲜薯产量,白膜、黑膜覆盖的鲜薯产量分别为51475.7、51976.0 kg/hm2,分别比对照增产17.7%、18.9%,均达极显著水平;覆膜处理赣薯2号的还苗期、分枝期、封垄期均较对照早2～3 d;白膜、黑膜覆盖的薯块单株中薯数分别为3.0、3.2个/株,中薯率分别为46.9%、50.8%,分别较对照增加9.0、12.9个百分点,此外地膜覆盖薯块的外观品质明显好于对照。

Effects of Plastic Film Mulching on Appearance Quality and Yield of Ganshu No.2

Sweet potato variety Ganshu No.2 was used as the tested material in this study.The effects of plastic film mulching on its appearance quality and yield were studied in upland red soil of Jiangxi province.The result showed that the film mulching could obviously improve fresh fruits yield.The yield was 51475.7 kg/hm2 and 51976.0 kg/hm2 in white film and black film mulching treatment,respectively.Compared with CK,it increased by 17.7% and 18.9%,respectively.Both reached 1% significant level.The stages of seedling reviving,branching,and sealing ridge were 2~3 days earlier than CK.The numbers of the medium-sized sweet potato by white film and black film were 3.0 and 3.2 per plant separately.The ratios were 46.9% and 50.8%,9.0 and 12.9 percentage points more than CK.Moreover,the ratio by black film was better than that by white film.Also,the appearance quality of sweet potato covered by plastic film was better than that of CK.