作物学报Issue(9)：1677-1685,9.DOI:10.3724/SP.J.1006.2014.01677
覆膜栽培对甘薯幼根生长发育、块根形成及产量的影响
Effects of Plastic Film Mulching Cultivation on Young Roots Growth Develop-ment, Tuber Formation and Tuber Yield of Sweet Potato
摘要
Abstract
A two-year trial and a one-year pot experiment were performed to investigate growth and development and absorbing ability of young roots, endogenous hormones content of differentiated roots at early growing stage using variety Jixu 23 with two types of plastic film mulching cultivation, and no plastic as control (CK). The tuberous root fresh weight per plant at 50 days after planting was determined, and its relationship with tuberous root yield at harvest time was analyzed. The results showed that, at 10 and 20 days after planting, the number, total length, fresh weight, and volume of young roots significantly increased compared with control, and the differences in activity, total absorption area and active absorption area of young roots between two plastic film mulching treatments were significant (P<0.05), showing the black plastic film mulching (BF) superior to the transparent film mulching (TF). Besides, zeatin riboside (ZR) content of differentiated roots (at 10 and 20 days after planting) was significant im-proved, which was in favor of procambium activity and tuberous roots formation. On the other hand, at early expansion period of tuberous roots, plastic film mulching cultivation increased abscisic acid (ABA) content and decreased gibberellin (GA) content in differentiated roots, as well as improved the secondary cambium activity, starch accumulation and differentiated root expansion. Meanwhile, abscisic acid (ABA) content and gibberellin (GA) content under the black film mulching significantly changed. Film mulching cultivation increased the number and fresh weight of tuberous roots per plant at 50 days after planting, which contrib-uted to higher fresh yield of tuberous root at harvest time. In the two year experiment, two treatments significantly enhanced the valid tuber number and fresh tuber yield compared with CK. The average increments were 10.71% and 5.76% in 2011, and 12.99%and 7.45%in 2012, respectively.关键词
甘薯/覆膜栽培/块根分化建成/产量Key words
Sweet potato/Film mulching cultivation/Tuberous root formation/Tuberous root yield引用本文复制引用
王翠娟,史春余,王振振,柴沙沙,柳洪鹃,史衍玺..覆膜栽培对甘薯幼根生长发育、块根形成及产量的影响[J].作物学报,2014,(9):1677-1685,9.基金项目
本研究由国家自然科学基金项目(31371577),国家现代农业产业技术体系建设专项(GARS-11-B-14)和山东省薯类创新团队首席专家(SDAIT-10-011-01)资助。 （31371577）
