不同地膜覆盖对鲜食型甘薯农艺性状和产量的影响

Effects of different film mulching on agronomic traits and yield of edible sweetpotato

为探讨覆膜栽培对鲜食型甘薯[Ipomoea Batatas(L.)Lam]主要农艺性状和产量的影响,以鲜食型甘薯品种烟薯25为试验材料,研究了不同地膜覆盖对其幼苗移栽成活率、生长发育和薯块产量的影响。结果表明,与CK相比,T1、T3处理的甘薯幼苗移栽成活率均提高了10个百分点左右;覆膜可降低栽后至55 d甘薯的主蔓长、粗和基部分枝数,栽后55 d甘薯茎基部分枝数以T3最多;T3处理甘薯的中薯数量最多,其次是T2,两者分别比CK高83.33%和66.67%。各覆膜处理均能提高甘薯单株薯重,T1、T2和T3分别比CK增加12.36%、31.46%和22.47%。与T2相比,T3可有效降低小薯数量、大薯产量和小薯产量,但增加了中薯数量和产量及其相应的占比。

In order to explore the effects of different film mulching on agronomic traits and yield of edible sweetpotato[Ipomoea Batatas(L.)Lam],taking Yanshu No.25 as tested material,and the effects of different film mulching on survival rate,growth and yield of fresh sweetpotato seedlings were studied.The result showed that,compared with CK,the survival rate of transplanted sweetpotato seedlings treated with T1 and T3 increased by 10 percentage.Film mulching effectively reduced the main stem length,thickness and the number of base branch from transplanted to the 55th days after planting,and the most base branches of sweet potato at the 55th days of planting was T3.The largest number of middle-sized tubers was T3,followed by T2,which was 83.33%and 66.67%higher than CK respectively.Compared with CK,the yield of sweetpotato treat with T1,T2 and T3 was increased by 12.36%,31.46%and 22.47%respectively.Compared with T2,T3 effectively reduced the number of small sweetpotato,the yield of big-sized tubers and small-sized tubers,meanwhile increased the number and yield of middle-sized tubers and the corresponding ratio.