期刊论文

Effects of potato continuous cropping on soil physicochemical and biological properties

中文

湖南农业大学学报(自然科学版)

1007-1032

2019

45

6

611-616

10.13331/j.cnki.jhau.2019.06.008

CARS-09-ES16:农业部马铃薯产业技术体系 2018YFD0200800:马铃薯化肥农药减施技术集成研究与示范项目 SCX1710:湖南省大学生创新创业训练计划

本校为第一机构

为揭示南方马铃薯连作障碍产生的机理,以金湘为材料,研究马铃薯连作对南方土壤理化性质、微生物数量、酶活性的影响。结果表明:新开垦土壤种植的马铃薯产量为43.69 t/hm~2,未见块茎发生疮痂病,连作土壤马铃薯产量显著降低,为25.63 t/hm~2,疮痂病薯率显著增加,为6.7%;种植1季春马铃薯后,连作土壤和新开垦土壤pH均降低,有效磷、全磷、全氮、碱解氮、速效钾和有机质含量增加,土壤放射菌总数降低,细菌总数和真菌总数均增加,土壤蔗糖酶活性、过氧化氢酶活性、磷酸酶活性、脲酶活性增加,转化酶活性降低;与新开垦土壤和第1季土壤相比,连作土壤的pH值及全氮、有机质含量显著降低,碱解氮含量降低,全磷、有...

Continuous cropping affects the yield and quality of potatoes. In order to reveal the potential mechanism of potato continuous cropping obstacles in southern China, we set up a serial experiments in this study to investigate the effects of potato continuous cropping on soil physical and chemical properties, microbial biomass and enzyme activities. The results showed that the potato planted in newly reclaimed soil yielded in 43.69 t/hm~2 without showing common scab symptoms of tubers. The potato yield in continuous cropping soil was significantly reduced to 25.63 t/hm~2 with the scab symptoms o...