Cultivation of sweetpotato by using bio-degradable plastic mulching films
(0) This experiment was conducted to determine the usability of biodegradable plastic in the mulching cultivation of sweetpotato.For this,we investigated the physical characteristics,biodegradability,leaching,yield,workability,etc.of biodegradable films.Compared with general mulching materials,biodegradable Poly butyleneadipate-CO-butylene succinate(PBSA)and Polycaprolactone(PLC)+starch showed 2％～27％ higher tensile strength,but 2％～22％lower elongation and 2％～6％ lower tear strength.In the leaching test on the biodegradable films,heavy metals were detected very little or not at all.As to difference in ground temperature according to mulching material,the temperature was high in order of PLC+starch>PBSA>Low Density Polyethylene(LDPE)>Control during the period from late June to mid July,but in order of LDPE>PLC+starch>PBSA>Control during the period from late July to late September.In the mulching cultivation of sweetpotato,biodegradable films PBSA(EA,EB,EC)and PLC+starch(DD,DE,DF)began to degrade after 60 days from the cut planting of sweetpotato,and over 95％degraded after 120 days.The quantity of roots was 3,070kg/10a for PBSA,3,093kg/10a for PLC+starch,and 2,946kg/10a for LDPE,showing no significant difference according to mulching material.Considering the physical characteristics,biodegradability,environment,convenience in harvesting work,yield,etc.of the films in the mulching cultivation of sweetpotato,biodegradable films are expected to be very useful.
Mulching Sweetpotato PBSA PLC+Starch LDPE
Joonseol Lee Kwangho Jeong Jinki Bang Jaesung Choi
Mokpo Experiment Station,National Institute of Crop Science,RDA,Muan 534-833,Korea
国际会议
3rd China-Japan-Korea Workshop on Sweetpotato(第三届中日韩甘薯学术研讨会)
北京
英文
97-105
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）