Effects of single/mixed sowing of three medicinal plants on the contents of carbon,nitrogen and enzymes activities of sandy soil

Authors Wu Yuchen; Lin Fang; Zhang Jiayang; Zhang Lulu

Journal Journal of Zhejiang a&f University , 2021,2:38

Abstract [Objective] This study aims to explore the effects of single and mixed sowing of three medicinal plants on soil quality. [Method] Taking Lonicera japonica(LJT),Chrysanthemum morifolium(CMR)and Astragalus membranaceus var. mongholicus(AMB)as experimental materials and sandy bare land as control(ck),the effects of single and mixed sowing patterns on organic carbon,alkaline hydrolyzable nitrogen and soil enzyme activity in different soil layers(0-40 cm)were studied in the location test conducted in northern Henan Province for 4 consecutive years,and their correlation was analyzed. [Result] The content of soil organic carbon,alkali hydrolyzable nitrogen and soil enzyme activity of urease,sucrase and alkaline phosphatase under the mixed sowing patterns of CMR/AMB and LJT/AMB were significantly higher than those under the single patten of CMR or LJT(P<0.05). Soil organic carbon content in CMR/AMB pattern increased by 29.32%,20.16% and 10.25% respectively,compared with ck,CMR and AMB. Alkaline hydrolyzable nitrogen content increased by 28.02% and 13.24% respectively,compared with ck and CMR. Soil organic carbon content of LJT/AMB pattern increased by 25.46%,18.09% and 6.96%,respectively,compared with ck,LJT and AMB. Alkaline hydrolyzable nitrogen content increased by 25.56% and 11.80% respectively,compared with ck and LJT. Soil organic carbon,alkali hydrolyzable nitrogen,and four soil enzymes were all significantly correlated with each other(P<0.01). From the view of soil profile,the soil organic carbon,alkali hydrolyzable nitrogen and the activities of 4 species of soil enzymes showed the characteristics of surface aggregation under different planting patterns. [Conclusion] CMR/AMB and LJT/AMB mixed patterns can improve the effectiveness of soil nutrients through the biological nitrogen fixation of A. membranaceus var. mongholicus. They are sustainable ecological patterns suitable for local promotion.

Species covered 忍冬 Lonicera japonica 蒙古黄耆（变种） Astragalus membranaceus var. mongholicus