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为了解生物炭施入不同类型土壤后对Olsen-P和CaCl2-P的影响,通过室内土壤培养试验,研究施用2%(20 t hm-2)、4%(40 t hm-2)、8%(80 t hm-2)比例的生物炭条件下土壤中Olsen-P、CaCl2-P含量变化,以探讨不同类型土壤中施入生物炭后Olsen-P和CaCl2-P含量变化的差异。结果表明:(1)红壤、水稻土、潮褐土、潮土中施用生物炭后,土壤中Olsen-P含量显著增加(P<0.05),并随着生物炭施用比例增加而增大。(2)培养42天后,施用生物炭对红壤中CaCl2-P含量无显著的影响,水稻土、潮褐土、潮土中CaCl2-P含量则随着生物炭施用比例增加而显著增大。(3)在同一生物炭施用量条件下,潮褐土和潮土中Olsen-P和CaCl2-P的增加量均显著(P<0.05)高于红壤和水稻土。
In order to understand the effects of biochar application on Olsen-P and CaCl2-P after applying different types of soils, indoor soil culture experiments were conducted to study the effects of biochar application on the growth of Olsen-P and CaCl2-P by 2% (20 t hm-2), 4% The content of Olsen-P and CaCl2-P in the soil under biochar with the percentage of 80t hm-2 was used to investigate the difference of Olsen-P and CaCl2-P contents in different types of soils after biochar application. The results showed that: (1) Olsen-P content in soil increased significantly (P <0.05) after application of biochar in red soil, paddy soil, moist cinnamon soil and alluvial soil, and increased with the increase of biochar application rate. (2) After 42 days of cultivation, the application of biochar had no significant effect on the content of CaCl2-P in red soil. The content of CaCl2-P in paddy soil, cinnamon soil and alluvial soil increased significantly with the increase of biochar application rate. (3) The increase of Olsen-P and CaCl2-P in both cinnamon soil and alluvial soil was significantly (P <0.05) higher than that of red soil and paddy soil under the same biochar application.