Plant-soil-microbe C-N-P contents and stoichiometry in response to nitrogen fertilization gradients during safflower growth and development
Description
We conducted field experiments with different fertilizer gradient treatments on safflower (Carthamus tinctorius L.), and collected data on plant-soil-microbe ecological stoichiometry and physicochemical properties, microbial abundance, and agronomic traits during four developmental stages of safflower. Through statistical analysis, we examined the effects of fertilization on the ecosystem during different developmental stages of safflower and elucidated the underlying mechanisms.By studying the response of plant-soil-microbe systems to nitrogen fertilization gradients during different developmental stages of safflower, it was discovered that the growth of safflower was limited by nitrogen and phosphorus, and the limitation of phosphorus on safflowers gradually increased with the growth of the plant, and fertilization alleviated the limitation of nitrogen on the growth of safflower. AN, AP, ALP, OM, bacteria, fungi and actinomycetes were the key factors affecting plant-soil-microbe C-N-P contents and stoichiometry. Fertilization mainly affects leaf stoichiometry by influencing soil quality and microbial quantity, which in turn affects leaf stoichiometry. For safflower ecosystems, N2 treatments not only increased soil quality, microbial number and safflower agronomic traits, but also affected plant-soil-microbe stoichiometry.