Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (8): 1468-1473.DOI: 10.3969/j.issn.1000-2561.2019.08.002

• Crop Culture and Nutrition, Genetic Breeding • Previous Articles     Next Articles

Comparison of Cassava Yield and Soil Microbial Characteristics under Continuous Cropping and Rotation

LIU Shanting1,LUO Xinglu1,2,*(),WU Meiyan1,TANG Zhiping1,WANG Chaochao1,ZHANG Jialing1   

  1. 1. College of Agricultural, Guangxi University, Nanning, Guangxi 530005, China
    2. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Nanning, Guangxi 530005, China
  • Received:2018-11-24 Revised:2019-03-13 Online:2019-08-25 Published:2019-08-20
  • Contact: LUO Xinglu

Abstract:

The relationship between the continuous cropping obstacles of cassava and soil microorganisms was studied by a comprehensive analysis of the soil microbial abundance, diversity, and community composition, yield of cassava under continuous cropping and rotation using a cassava variety Xinxuan 048 as the material and using high-throughput sequencing technology in the experiment. The results showed that the bacterial abundance and diversity of cassava continuous soil were higher than that of the rotation. The number of OTUs of the bacteria for the continuous cropping was 23.05% higher than that of the rotation. The Chao1 index of the continuous cropping was 463.2 higher than that of the rotation and the Shannon index of the continuous croping was 0.41 higher than that of the rotation, while the abundance and diversity of the fungi of the continuous cropping were lower than that of the rotation. The number of OTUs of the fungi of the rotation was 19.57% higher than that of the continuous cropping, the Chao1 index of the fungi of the rotation was 217.5 higher than that of the continuous cropping, and the Shannon index of the rotation was 0.76 higher than that of the continuous crop. The soil bulk density of the continuous cropping was 0.24 g/cm 3 higher than of the rotation. The soil solid phase in the continuous cropping was 6.69% higher than that in rotation, and the liquid phases was 3.03%, while gas phases was 9.72% lower than that in rotation. The yield of rotation was 11.99 t/hm 2 higher than that of the continuous, reaching a significant level of 0.05. The changes of microbial community in the soil and the solid, liquid and gas phase of the soil were closely related to the continuous cropping obstacles of cassava. It is an effective way to overcome the continuous cropping obstacles of cassava to adopt cultivation management measures to adjust the composition of soil micro-organisms.

Key words: cassava (Manihot esculenta Crantz), continuous cropping obstacles, soil microbiome, high-throughput sequencing

CLC Number: