Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Beijing Innovation Consortium of Agriculture Research System, Beijing 100193, China.
J Agric Food Chem. 2020 May 6;68(18):5049-5058. doi: 10.1021/acs.jafc.9b08033. Epub 2020 Mar 24.
The soil phosphorus (P) cycle and P transformation are largely driven by the soil bacterial microbial community. However, little is known about the effects of dazomet (DZ) soil fumigation on soil P and soil microbial communities associated with P transformation. This research investigated P released from three farm soils as a result of DZ fumigation and changes in enzyme activity, gene abundance, and the encoding alkaline phosphatase microbial community. After DZ fumigation, we observed a briefly significant increase in the available P and the active P fractionation. The soil ALP activity, 16 abundance, and the gene decreased significantly after DZ fumigation. The abundance and diversity of -harboring microbes also decreased shortly after fumigation, increased significantly 14-28 days later, and then decreased again toward the end of the experimental period of 86 days. The shared OTUs between treatments became fewer with increasing time after fumigation. The changes in available P and the active P fractionation after DZ fumigation were significantly correlated with the abundance of the dominant -harboring microbes. DZ fumigation promoted P mineralization in these farm soils and changed the composition of -harboring microbial communities, which will benefit crops able to absorb and use P.
土壤磷（P）循环和 P 转化在很大程度上受土壤细菌微生物群落的驱动。然而，人们对土壤熏蒸剂威百亩（DZ）对与 P 转化相关的土壤 P 和土壤微生物群落的影响知之甚少。本研究调查了 DZ 熏蒸对三种农田土壤中 P 的释放以及酶活性、基因丰度和碱性磷酸酶编码微生物群落变化的影响。DZ 熏蒸后，我们观察到有效 P 和活性 P 分组的含量短暂显著增加。DZ 熏蒸后，土壤碱性磷酸酶活性、16S 基因丰度和基因丰度显著下降。熏蒸后不久，携带-基因的微生物的丰度和多样性也会减少，28 天后会显著增加，然后在 86 天的实验期结束时再次减少。处理之间的共有 OTUs 随着熏蒸后时间的增加而减少。DZ 熏蒸后有效 P 和活性 P 分组的变化与优势携带微生物的丰度显著相关。DZ 熏蒸促进了这些农田土壤中的 P 矿化，并改变了携带-基因的微生物群落的组成，这将有利于能够吸收和利用 P 的作物。
