Effect of Boichar on Olsen-P and CaCl2-P in Different Types of Soil
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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％(20t hm-2)、4％(40 thm-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.
To understand the effect of boichar on Olsen-P and CaCl2-P in different types of soil,an incubation experiment was conducted to test the change of Olsen-P,CaCl2-P concentration in different types of soil with applying 2％ (20 t hm-2),4％ (40 t hm-2),8％ (80 t hm-2) ratio biochar in order to discuss the difference of the change of Olsen-P,CaCl2-P concentration in different types of soil applied biochar.The results showed:(1) Olsen-P concentration in red soil,paddy soil,cinnamon soil and alluvial soil significantly increased as biochar application ratio increased.(2) After 42 days of incubation,CaCl2-P concentration in paddy soil,cinnamon soil and alluvial soil increased along with the increase of application ratio of biochar,while red soil had no significant effect on CaCl2-P concentration.(3) In the same application ratio biochar treatments,Olsen-P concentration and CaCl2-P concentration in cinnamon soil and alluvial soil were higher than them in red soil and paddy soil.
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