地膜覆盖对木薯生长发育和产量及淀粉含量的影响

目的]探索木薯节本增效栽培技术。方法]分别采用地膜覆盖与不覆膜（对照）2种方式种植木薯，研究地膜覆盖对木薯茎叶生长、产量构成因素及淀粉含量的影响。结果]地膜覆盖可促进木薯前中期茎叶生长，增加木薯生物量；地膜和覆盖后，木薯的块根长度、块根直径、单株块根数、单株块根重和小区鲜块根产量分别较对照增加了17．79％、14．61％、14．28％、76．14％和76．09％；地膜覆盖后木薯的淀粉含量较对照降低2％，但相同面积木薯的淀粉产量较对照增加65．35％。结论]地膜覆盖是木薯节本增效栽培的有效措施，其增产效应主要是通过促进木薯前中期茎叶生长、提高块根直径和单株块根重、增加块根充实度实现的。

Effects of Plastic Film Mulching on Development and Yield and Starch Content of Cassava

Objective] The study was to explore cultivation techniques with less cost and high benefit for cassava.Method] 2 planting patterns of plastic film mulching and no mulching (CK) were taken to plant cassava, the effects of plastic film mulching on growth of stem and leaf, yield components and starch content of cassava were studied.Result] Plastic film mulching could improve the growth of stem and leaf of cassava at early and middle stage and increase the biomass of cassava.After plastic film mulching, the length and diameter of root tuber, number and weight of root tuber per plant and fresh root tuber yield per plot of cassava were increased by 17.79%, 14.61%, 14.28%, 76.14%, 76.09% resp.than that of CK.After plastic film mulching the starch content of cassava was decreased by 2% than that of CK, while the starch yield of cassava of the same area was increased by 65.35% than that of CK.Conclusion] Plastic film mulching was the effective measurement of cultivation with less cost and high benefit for cassava, the yield increasing effect was realized through promoting stem and leaf growth of cassava at early and middle sate, improving root tuber diameter and root tuber weight per plant, and increasing the plumpness of root tuber.