| This article has been：Browse 130Times Download 93Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2023075 |
|
| Effect of long-term fertilization on chemical stoichiometry of topsoil in solar greenhouse |
|
LIU Ping, LI Lijun, HUO Xiaolan, MA Linjie, HUI Wei, MA Qiqi
|
|
1. College of Resource and Environment, Shanxi Agricultural University, Taiyuan 030031, China;
2. Laboratory of Soil Environment and Nutrient Resources of Shanxi Province, Taiyuan 030031, China;
3. School of Biological Engineering, Shanxi University, Taiyuan 030006, China
|
| Abstract: |
| 【Objective】Soil chemical stoichiometry is an important trait affecting microbial activity and the associated carbon and nitrogen cycling. It is dynamic and modulating by both abiotic and biotic factors. In this paper, we study the effect of long-term fertilization on chemical stoichiometry of the topsoil in solar greenhouses.【Method】Soil samples were taken from solar greenhouses that have been in operation from 5 to 30 years. The control was soil samples taken from an adjacent field. The chemical properties of each soil sample were analyzed in laboratory.【Result】Soil organic matter increased in the first 15 years after the establishment of the greenhouse and then decreased asymptotically to a content as the greenhouses continued operation in the subsequent years. The variations in total soil nitrogen and total soil phosphorus were similar to that in soil organic matter. Depending on the operating duration of the greenhouses, the total soil nitrogen and total soil phosphorus were 1.4-2.6 times and 1.7-4.5 times that in the adjacent field, respectively. The total soil nitrogen and total soil phosphorus peaked 15 years and 20 years after the greenhouses were established, respectively. The C∶N and N∶P decreased with the increase in longevity of the greenhouses, with their values varying in the ranges of 8.7 to 10.3 and 1.2 to 1.6, respectively. In contrast, the C∶P ratio increased significantly at first and then decreased slowly in the range of 7.7 to 15.6, with the increase in longevity of the greenhouses. The increasing rates of C, N and P with operating duration of the greenhouse were ranked in the order of P>N>C, resulting in C∶P>N∶P>C∶N.【Conclusion】Continued high fertilizer input in greenhouse production resulted in an accumulation of carbon, nitrogen and phosphorus, but the C∶N, C∶P and N∶P ratios remained relatively stable. Increased phosphorus and decreased organic carbon is a problem in greenhouse production, and measures such as reducing phosphorus application, adjusting nitrogen fertilization and increasing organic fertilization can be used to mitigate this problem and improve soil health. |
| Key words: greenhouse; long-term fertilization; stoichiometric; different planting years; cinnamon soil area in Shanxi Province |
|
|
