Variations of soil phosphatase activity and phosphorus fractions in ginger fields exposed to different years of chloropicrin fumigation

文献类型： 外文期刊

第一作者： Wang, Yan

作者： Wang, Yan;Yang, Xiaomei;Geissen, Violette;Wang, Yan;Xu, Minggang;Yang, Xiaomei

作者机构：

关键词： Fumigation; Chloropicrin; Ginger; Phosphatase activity; Soil P fractions

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.536； 五年影响因子：3.821 ）

ISSN： 1439-0108

年卷期： 2022 年 22 卷 5 期

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收录情况： SCI

摘要： Purpose Although soil fumigation efficiently controls soil-borne diseases, the effects of repeated soil fumigation on soil phosphorus (P) cycling are still largely unknown. Methods In this study we conducted a field experiment to explore soil phosphorus availability in ginger fields with 0, 3, and 7 years (F0, F3, and F7) of annual chloropicrin (CP) fumigation history in Shandong Province of China. Soil samples (0-20 cm) were collected at four different times in 2019. Ginger yield, soil phosphatase (acid and alkaline) activities, and soil P fractions were measured. Results Results showed that ginger rhizome yield was similar in F0 and F3 (70.0 t ha(-1)), but significantly lower in F7 (37.5 t ha(-1)). The acid phosphatase (AiP) activity was significantly higher in F0, while alkaline phosphatase (AlP) activity was the highest in F3. There was no significant difference in the available P (resin-P + NaHCO3-P + NaOH-P) between F0 and F7, with 33.6 to 57.5% of total P (TP), while the available P was significantly lower in F3, being less than 30% of TP. Redundancy analysis (RDA) showed that the highest pH values in F3 contributed to the lowest soil P availability there. AiP activities showed highly positive effects on the soil labile P contents. Conclusion Results suggested that more P fertilizers are needed after 3 years of CP fumigation to avoid soil P deficiency for ginger growth. The death of ginger became the main limitation for ginger production after 7 years of CP fumigation, at which time, comprehensive agricultural practices should be considered to control ginger soil-borne diseases.

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