Effects of Soil Nutrients, Enzyme Activities and Microbial Composition in Vegetable-Polygonatum Odoratum Rotation Regimes

Abstract

<jats:p> The rotation regimes significantly alter soil properties, however, understanding the effect of crop rotation in various crops system was currently limited. The aim of this research was to reveal the variation in crop productivity, soil nutrients, enzyme activities, and bacterial community composition in vegetable-Polygonatum odoratum rotation horticulture. Thus, a 2-year field experiment was carried out under the P.odoratum-P.odoratum rotation (CC) and vegetable-P.odoratum rotation (FC) system through a randomized complete block design comprising of triplicate plots. The results showed that FC promoted most of the beneficial agronomic traits, soil nutrients, enzyme activities, and reducing root rot disease of P.odoratum. High-throughput sequencing revealed a shift in the microbial community groups with high environmental contaminants degradation ability, and a close correlation between increasing microbial diversity and major environmental factors like soil nutrients, enzyme activities under FC cropping system compared with CC. Therefore, crop rotations with vegetable- P.odoratum was recommended in cultivation. </jats:p>

Physiological and transcriptomic analyses to reveal underlying phenolic acid action in consecutive monoculture problem of Polygonatum odoratum

“…The phenolic acids are detrimental to the rhizosphere soil environment and can change the soil microbial community [ 9 ]. Phenolic acids have a hydroxyl group and a carboxyl group.…”

“…An early study showed that the low-molecule-weight substances extracted from the P. odoratum rhizosphere soil solutions exhibited an obvious self-poison effect on P. odoratum seedling growth and allelopathy effect on the rhizome spore germination rate [ 8 ]. Our recent studies have revealed that the Polygonatum CMP could be alleviated or eradicated under the rotation regimes or with an aeroponic system [ 9 , 10 ], and the miRNAs-regulated genes participating in the sugar and phenylpropanoid metabolism have been enriched through the mircoRNA sequencing on the CC and the first cropping (FC) P. odoratum [ 11 ]. All these results prompted that the root rot in P. odoratum was likely related to the phenolic acid metabolism.…”