Stoichiometric characteristics of Robinia pseudoacacia and Pinus tabuliformis plantation ecosystems in the Loess hilly-gully region, China

Plant-Soil Stoichiometric Characteristics and Their Influencing Factors in the Pisha Stone Area

“…The results showed that alfalfa N/P showed an increasing trend with significant differences (P<0.05); 2 yr was P-limited, and 5 yr and 7 yr were N and P co-limited. Zhang [19] studied the ecological stoichiometric characteristics of Robinia pseudoacacia and Pinus tabulaeformis plantation ecosystems in a loess hilly region and concluded that there were different relationships between plant and soil nutrient characteristics at different levels. Wang [20] found that the contents of N and P in green leaves and dead leaves of alfalfa increased first and then decreased with the increase of the age of alfalfa, and the N/P decreased first and then increased with the increase of the age of alfalfa.…”