首页|Effects of exogenous phosphorus compounds interact with nitrogen addition on soil organic phosphorus fractions in a meadow steppe
Effects of exogenous phosphorus compounds interact with nitrogen addition on soil organic phosphorus fractions in a meadow steppe
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NETL
NSTL
Springer Nature
Purpose Soil organic phosphorus is vital for plant growth and function, but there is still largely restricted to learning about how co-adding nitrogen (N) and phosphorus (P) affects the soil OP dynamics. Methods We researched the impacts of different P compound addition [KH2PO4 (PK) vs. Ca(H2PO4)2 (PCa)] at rates of 0, 2, 4, 6, 8, and 10 g P m- 2 yr- 1 combined with two-level N (NH4NO3) addition (0 and 10 g N m- 2 yr- 1) on soil labile, moderate-labile, moderate-stable, and high-stable organic P concentrations in a meadow steppe. Results Results showed that PK addition resulted in higher soil labile and high-stable organic P concentrations than PCa addition. P addition enhanced the concentration of soil labile organic P regardless of P compound form. P addition alone showed no impact on soil moderate-stable organic P. Compared with P addition alone, combined N and PK addition increased soil labile, moderate-labile and high-stable organic P concentrations, while combined N and PCa addition significantly decreased moderate-labile and moderate-stable organic P. Conclusion Our results highlighted that soil labile organic P is critical to the P cycle in grassland, and the P compound forms need to be taken into account when managing grasslands related to P utilization.
NETL
NSTL
Springer Nature
