Benefits of partially substituting mineral fertilizers with organic manure combined with foliar selenium on the growth of <i>Atractylodes macrocephala</i> Koizd.

• Main Authors: ZHOU Wu-xian, ZHANG Mei-de, WANG Hua, DUAN Yuan-yuan, AI Lun-qiang, HUANG Dong-hai, LUO Xiao-rong, ZHANG Yu
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2021-05-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: <i>atractylodes macrocephala</i>; organic manure; exogenous selenium; leaf; functional characteristics; soil properties
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2021/3/20210312.htm

To explore the effects of applying organic manure combined with foliar Se on the growth of <i>Atractylodes macrocephala</i>, and the possible mechanism thereof, an experiment using five different treatments was conducted to determine the effects of the treatments on leaf growth(a functional characteristic of leaves), yield and rhizospheric soil properties. The five treatments were as follows:spraying with distilled water(CK); mineral fertilizers partially substituted with organic manure combined with spraying of distilled water(OM); mineral fertilizers partially substituted with organic manure combined with spraying 5 mg·m^-2 foliar Se(OM + 5Se); mineral fertilizers partially substituted with with organic manure combined with spraying 10 mg·m^-2 foliar Se(OM+10Se); and mineral fertilizers partially substituted with organic manure combined with spraying 15 mg·m^-2 foliar Se(OM+15Se). The results showed that compared with the CK, the OM, OM + 5Se, OM + 10Se and OM + 15Se treatments significantly increased the leaf area of <i>A. macrocephala</i> by 12.3%, 25.3%, 22.5%, and 10.4%, respectively. The OM + 5Se and OM + 10Se treatments produced a marked increase in leaf dry weight, of 10.7% and 13.0%, respectively, while also decreasing the leaf length width ratio by 15.6% and 18.4%, respectively. The OM + 5Se treatment increased the specific leaf area significantly, by 13.0%. The OM, OM + 5Se, OM + 10Se and OM + 15Se treatments also increased the yield of <i>A. macrocephala</i> significantly, by 37.3%, 121.7%, 91.7%, and 65.2%, respectively. The promotion of the growth in <i>A. macrocephala</i> leaves by the application of foliar Se(based on the application of organic manure) showed an increasing trend when Se was applied at low levels but a decreasing trend when Se was at high levels. Correlation analysis showed that the growth of <i>A. macrocephala</i> could be understood preliminarily by measuring its leaf functional characteristics. The OM, OM + 5Se, OM + 10Se and OM + 15Se treatments significantly increased the content of organic matter, alkaline N, and available P and K in the rhizospheric soil of <i>A. macrocephala</i>, compared with the CK. Thus, the application of both mineral fertilizers only partially substituted with organic manure and that combined with foliar Se treatments all increased the growth and yield of <i>A. macrocephala</i>. The application of mineral fertilizers partially substituted with organic manure combined with 5 mg·m^-2 foliar Se was the optimal treatment.